Centralized control type high-voltage isolating switch electric operating mechanism

Abstract

The invention discloses a centralized control type high-voltage isolating switch electric operating mechanism, and belongs to the field of high-voltage isolating switch electric operating mechanisms. Comprising an electrical control module and a motor auxiliary switch circuit which are separately arranged, the motor auxiliary switch circuit is reserved and arranged in a mechanism box of the electric operating mechanism, the mechanism box is located outdoors, the electrical control module is arranged in a control cabinet of the high-voltage isolating switch, the control cabinet is located indoors, and the motor auxiliary switch circuit is arranged in the control cabinet. The electrical control module is connected with the motor auxiliary switch circuit through a multi-core cable, and motor operation control and opening and closing position signal transmission of the electric operating mechanism multiplex the multi-core cable. The intelligent module has the advantages that the possibility that the intelligent module is serially connected with strong electromagnetic interference can be completely eradicated, and the problems of safety and reliability of the intelligent module possibly existing under the condition of strong electromagnetic interference are solved.

Description

Technical Field

[0001] The invention belongs to the field of electric operating mechanisms for high-voltage disconnect switches, and in particular relates to a centrally controlled electric operating mechanism for high-voltage disconnect switches. Background Art

[0002] High-voltage disconnector is a high-voltage switchgear connected in series to the high-voltage transmission circuit, which is related to the safety of the high-voltage transmission and distribution network. It is usually installed at the starting point of the high-voltage distribution station transmission and distribution network. The electric operating mechanism of the high-voltage disconnector is the general control device of the high-voltage disconnector. The existing electric operating mechanism of the high-voltage disconnector is an independent unit electrical equipment designed according to the functional requirements. All its components are collected in the same mechanism box, and all the internal electrical components are designed according to the standard parameters of the indoor environment. Such devices have high working reliability, high safety and low failure rate in the indoor environment. However, once they are placed in the field, in a high temperature and high humidity environment, the electrical components in the mechanism box are densely stacked and the heat dissipation conditions are poor, which will cause a lot of acclimatization of the electrical components. In particular, the location of the electrical components in the mechanism box is very susceptible to strong electromagnetic interference such as strong thunderstorms, which seriously reduces the reliability of the electrical components in the mechanism box, with a high failure rate and poor maintainability, seriously affecting the normal operation and safe power supply of the power grid.

[0003] With the continuous development of science and technology, the intelligent construction of power grids has become an inevitable trend. The defects of the existing design of the electric operating mechanism of high-voltage disconnectors in the intelligent development have become apparent. The mechanism box of the electric operating mechanism of high-voltage disconnectors is easily attacked by strong electromagnetic interference such as strong thunderstorms. Factors such as high temperature and high humidity also bring more severe safety problems to the intelligent upgrade of the electric operating mechanism of high-voltage disconnectors. Therefore, it is urgent to find a new high-voltage disconnector solution that is fully competent, can work reliably under strong electromagnetic interference, and has better safety, higher reliability, and better maintainability.

[0004] In view of the above-mentioned prior art, the applicant has made a useful design, and the technical solution to be introduced below is produced in this context. Summary of the invention

[0005] The purpose of the present invention is to provide a centrally controlled high-voltage disconnector electric operating mechanism, which can completely eliminate the possibility of strong electromagnetic interference in the intelligent module and solve the safety and reliability problems of the intelligent module that may exist under strong electromagnetic interference.

[0006] The object of the present invention is achieved in this way. A centrally controlled high-voltage disconnector electric operating mechanism comprises an electrical control module and a motor auxiliary switch circuit which are separately arranged. The motor auxiliary switch circuit is retained in a mechanism box of the electric operating mechanism, and the mechanism box is located outdoors. The electrical control module is arranged in a control cabinet of the high-voltage disconnector, and the control cabinet is located indoors. The electrical control module and the motor auxiliary switch circuit are connected by a multi-core cable, and the motor operation control and the transmission of the opening and closing position signals of the electric operating mechanism reuse the multi-core cable.

[0007] In a specific embodiment of the present invention, the multi-core cable is a 5-core cable.

[0008] In another specific embodiment of the present invention, the electrical control module includes a high-current voltage relay KV, a voltage-current two-phase relay KVA, a magnetic latching relay KB, an electronic time relay KT, an AC contactor KM, a motor working ammeter A, a switch-off position signal relay KS1, a switch-on position signal relay KS2, a manual switch-off control self-resetting switch KK, a remote conversion combination switch YK, a maintenance protection switch K1, an external device interlock switch K2, a remote switch-off control switch K3, a remote switch-on control switch K4, a switch-off indicator light LD1, a switch-on indicator light LD2, a fault indicator light LD3, diodes D1, D2, a control power transformer B, a main DC regulated power supply U1, and an auxiliary DC regulated power supply U2 And resistor R, wherein the voltage and current two-phase relay KVA has overcurrent alarm and protection functions, the electronic time relay KT has a short delay function, one end of the coil of the high-current voltage relay KV is connected to one end of the reset contact KB-1R of the magnetic holding relay, one end of the voltage coil of the voltage and current two-phase relay KVA is connected to one end of the external device interlock switch K2, the other end of the external device interlock switch K2 is connected to one end of the maintenance protection switch K1, the other end of the voltage coil of the voltage and current two-phase relay KVA is connected to the common end of the high-current voltage relay moving contact KV-3, the normally closed contact of the high-current voltage relay moving contact KV-3 is connected to the No. 1 end of the opening contact of the manual opening and closing control self-resetting switch KK, The cathode of diode D2 is connected to one end of the remote opening control switch K3, the 3 ends of the closing contact of the manual opening and closing control self-resetting switch KK are connected to the normally open contact of the large current voltage relay moving contact KV-3, the cathode of diode D1 and one end of the remote closing control switch K4, the anode of diode D1 is connected to one end of the S coil of the magnetic holding relay KB, the anode of diode D2 is connected to one end of the R coil of the magnetic holding relay KB, the other end of the R coil of the magnetic holding relay KB and the other end of the S coil are commonly connected to the normally open contact of the voltage and current two-phase relay moving contact KVA-1, the normally closed contact of the voltage and current two-phase relay moving contact KVA-1 is connected to one end of the normally closed contact KS1-21 of the opening position signal relay , the other end of the normally closed contact KS1-21 of the opening position signal relay is connected to one end of the normally closed contact KS2-21 of the closing position signal relay KS2, the other end of the normally closed contact KS2-21 of the closing position signal relay is connected to one end of the coil of the electronic time relay KT, the other end of the remote opening control switch K3 is connected to the other end of the remote closing control switch K4 and the 10 end of the remote contact of the remote conversion combination switch YK, the 12 end of the local contact of the remote conversion combination switch YK is connected to the 2 and 4 contacts of the manual opening and closing control self-resetting switch KK, one end of the opening indicator light LD1 is connected to one end of the normally open contact KS1-21 of the opening position signal relay KS1,One end of the closing indicator light LD2 is connected to one end of the closing position signal relay normally open contact KS2-21 of the closing position signal relay KS2, one end of the fault indicator light LD3 is connected to one end of the time relay normally open contact KT-21, the other end of the opening position signal relay normally open contact KS1-21, the other end of the closing position signal relay normally open contact KS2-21, the other end of the time relay normally open contact KT-21, the common end of the voltage and current two-phase relay moving contact KVA-1, the other end of the magnetic holding relay reset contact KB-1R and the other end of the maintenance protection switch K1 are connected to the DC power supply VDD, the other end of the opening indicator light LD1, the other end of the closing indicator light LD2, the other end of the fault indicator light LD3 The other end of the fault indicator light LD3, the other end of the time relay KT coil, the other end of the high current voltage relay KV coil and the local and remote contacts 9 and 11 of the remote conversion combination switch YK are grounded together; one end of the main winding coil of the control power transformer B and one end of the AC contactor KM coil are connected to the N end of the power supply, the other end of the AC contactor KM coil is connected to one end of the voltage and current two-phase relay normally open contact KVA-21, the other end of the voltage and current two-phase relay normally open contact KVA-21 and the other end of the main winding coil of the control power transformer B are connected to the L end of the power supply, the first secondary winding of the control power transformer B is connected to the main DC regulated power supply U1, and the main DC regulated power supply U2 is connected to the main DC regulated power supply U3. Source U1 provides a DC power supply VDD, the second secondary winding of the control power transformer B is connected to the auxiliary DC regulated power supply U2, the auxiliary DC regulated power supply U2 provides a DC power supply VCC and a DC power supply VEE, one end of the third secondary winding of the control power transformer B is connected to one end of a resistor R, the other end of the resistor R is respectively connected to the positive pole of the coil of the opening position signal relay KS1 and the negative pole of the coil of the closing position signal relay KS2, the negative pole of the coil of the opening position signal relay KS1 is connected to the reset contact KB-2R of the magnetic latching relay, the positive pole of the coil of the closing position signal relay KS2 is connected to the set contact KB-2S of the magnetic latching relay, the common terminal KB-2 of the magnetic latching relay is connected to the normally closed contact of the AC contactor The other end of the AC contactor normally closed contact KM-12 is connected to one end of the voltage and current two-phase relay KVA current coil and the common end of the large current voltage relay moving contact KV-1. The other end of the voltage and current two-phase relay KVA current coil is connected to one end of an AC contactor main contact KM-11. The other end of the AC contactor main contact KM-11 is connected to the positive pole of the power supply through the fuse 1RD. One end of the normally closed contact and one end of the normally open contact of the large current voltage relay moving contact KV-1 are respectively connected to the motor auxiliary switch circuit through the second and first cores of the 5-core cable. The other end of the third secondary winding of the control power transformer B is connected to one end of the AC contactor normally closed contact KM-22.The other end of the normally closed contact KM-22 of the AC contactor is connected to the motor auxiliary switch circuit through the 5th core of the 5-core cable. One end of the motor working ammeter A is connected to one end of the main contact KM-11 of another AC contactor. The other end of the main contact KM-11 of another AC contactor is connected to the negative pole of the power supply through the fuse 2RD. The other end of the motor working ammeter A is connected to the common end of the moving contact KV-2 of the large current voltage relay. The normally closed contact and the normally open contact of the moving contact KV-2 of the large current voltage relay are connected to the motor auxiliary switch circuit through the 4th and 3rd cores of the 5-core cable respectively.

[0009] In another specific embodiment of the present invention, the motor auxiliary switch circuit includes a motor M, a diode D3, an opening position switch SP1, a closing position switch SP2, a rotating porcelain bottle opening position magnetic induction switch SP3, a rotating porcelain bottle closing position magnetic induction switch SP4 and a manual electric conversion switch SP5, the diode D3 is used to generate an opening and closing position signal, the motor M is a DC drive motor, one end of the opening position switch normally open contact SP1-11 is connected to one end of the opening position switch normally closed contact SP1-22, and are connected together to the first core of the 5-core cable, the opening position switch normally open contact SP1-22 is connected to the first core of the 5-core cable, and the opening position switch normally open contact SP1-22 is connected to the first core of the 5-core cable. The other end of P1-11 is connected to one end of the normally closed contact SP1-12 of the opening position travel switch and the positive electrode of the diode D3. The other end of the normally closed contact SP1-12 of the opening position travel switch is connected to one end of the normally open contact SP4-11 of the rotating porcelain bottle closing position magnetic induction switch. The other end of the normally open contact SP4-11 of the rotating porcelain bottle closing position magnetic induction switch is connected to one end of the normally open contact SP2-11 of the closing position travel switch. The other end of the normally open contact SP2-11 of the closing position travel switch is connected to one end of the normally open contact SP1-21 of the opening position travel switch, and are connected together to the 5th core of the 5-core cable. The other end of the open contact SP1-21 is connected to one end of the normally open contact SP3-11 of the rotating porcelain bottle opening position magnetic induction switch, the other end of the normally open contact SP3-11 of the rotating porcelain bottle opening position magnetic induction switch is connected to one end of the normally closed contact SP2-12 of the closing position travel switch, the other end of the normally closed contact SP2-12 of the closing position travel switch is connected to the cathode of the diode D3 and one end of the normally open contact SP2-21 of the closing position travel switch, the other end of the normally open contact SP2-21 of the closing position travel switch is connected to one end of the normally closed contact SP2-22 of the closing position travel switch, and are connected together to the second core of the 5-core cable, and the closing position line The other end of the normally closed contact SP2-22 of the manual electric transfer switch is connected to one end of the normally closed contact SP5-11 of the manual electric transfer switch and one end of the normally closed contact SP1-32 of the opening position travel switch. The other end of the normally closed contact SP5-11 of the manual electric transfer switch is connected to one end of the motor M. The other end of the motor M is connected to the other end of the normally closed contact SP1-22 of the opening position travel switch and one end of the normally closed contact SP2-32 of the closing position travel switch. The other end of the normally closed contact SP2-32 of the closing position travel switch is connected to the 4th core of the 5-core cable, and the other end of the normally closed contact SP1-32 of the opening position travel switch is connected to the 3rd core of the 5-core cable.

[0010] In another specific embodiment of the present invention, the electrical control module includes a high-current voltage relay KV, a voltage-current two-phase relay KVA, a magnetic latching relay KB, an electronic time relay KT, an AC contactor KM, a motor working ammeter A, a switch-off position signal relay KS1, a switch-on position signal relay KS2, a manual switch-off control self-resetting switch KK, a remote conversion combination switch YK, a maintenance protection switch K1, an external device interlock switch K2, a remote switch-off control switch K3, a remote switch-on control switch K4, a switch-off indicator light LD1, a switch-on indicator light LD2, a fault indicator light LD3, diodes D1, D2, a control power transformer B, a main DC regulated power supply U1, an auxiliary DC regulated power supply U2, Resistor R1, zero-sequence sensor IO and three-phase circuit breaker QF, wherein the voltage and current two-phase relay KVA has overcurrent alarm and protection functions, the electronic time relay KT has a short delay function, one end of the coil of the high-current voltage relay KV is connected to one end of the reset contact KB-1R of the magnetic holding relay, one end of the voltage coil of the voltage and current two-phase relay KVA is connected to one end of the external device interlock switch K2, the other end of the external device interlock switch K2 is connected to one end of the maintenance protection switch K1, the other end of the voltage coil of the voltage and current two-phase relay KVA is connected to the common end of the moving contact KV-3 of the high-current voltage relay, and the normally closed contact of the moving contact KV-3 of the high-current voltage relay is connected to the manual opening and closing control self-resetting The opening contact 1 end of the switch KK is connected to the cathode of the diode D2 and one end of the remote opening control switch K3. The closing contact 3 ends of the manual opening and closing control self-resetting switch KK are connected to the normally open contact of the large current voltage relay moving contact KV-3, the cathode of the diode D1 and one end of the remote closing control switch K4. The anode of the diode D1 is connected to one end of the S coil of the magnetic holding relay KB. The anode of the diode D2 is connected to one end of the R coil of the magnetic holding relay KB. The other end of the R coil of the magnetic holding relay KB and the other end of the S coil are connected to the normally open contact of the voltage and current two-phase relay moving contact KVA-1. The normally closed contact of the voltage and current two-phase relay moving contact KVA-1 is connected to the normally closed contact of the opening position signal relay. The other end of the normally closed contact KS1-21 of the opening position signal relay is connected to one end of the normally closed contact KS2-21 of the closing position signal relay KS2, and the other end of the normally closed contact KS2-21 of the closing position signal relay is connected to one end of the coil of the electronic time relay KT. The other end of the remote opening control switch K3 is connected to the other end of the remote closing control switch K4 and the 10 end of the remote contact of the remote conversion combination switch YK. The 12 end of the remote contact of the remote conversion combination switch YK is connected to the 2 and 4 ends of the manual opening and closing control self-resetting switch KK. The remote and local contacts 9 and 10 ends of the remote conversion combination switch YK are connected to the other end of the coil of the time relay KT.One end of the opening indicator light LD1 is connected to one end of the opening position signal relay normally open contact KS1-21 of the opening position signal relay KS1, one end of the closing indicator light LD2 is connected to one end of the closing position signal relay normally open contact KS2-21 of the closing position signal relay KS2, one end of the fault indicator light LD3 is connected to one end of the time relay normally open contact KT-21, the other end of the opening position signal relay normally open contact KS1-21, the other end of the closing position signal relay normally open contact KS2-21, the other end of the time relay normally open contact KT-21, the common end of the voltage and current two-phase relay moving contact KVA-1, the other end of the magnetic holding relay reset contact KB-1R and the maintenance protection switch K The other end of 1 is connected to the DC power supply VDD, the other end of the opening indicator light LD1, the other end of the closing indicator light LD2, the other end of the fault indicator light LD3, the other end of the coil of the time relay KT, the other end of the coil of the high-current voltage relay KV, and the 9 and 10 ends of the remote and local contacts of the remote conversion combination switch YK are grounded together; one end of the main winding coil of the control power transformer B and one end of the coil of the AC contactor KM are connected to the N end of the power supply, the other end of the coil of the AC contactor KM is connected to one end of the normally open contact KVA-21 of the voltage and current two-phase relay, and the other end of the normally open contact KVA-21 of the voltage and current two-phase relay and the other end of the main winding coil of the control power transformer B are connected to the L end of the power supply. , the first secondary winding of the control power transformer B is connected to the main DC regulated power supply U1, and the main DC regulated power supply U1 provides a DC power supply VDD. The second secondary winding of the control power transformer B is connected to the auxiliary DC regulated power supply U2, and the auxiliary DC regulated power supply U2 provides a DC power supply VCC and a DC power supply VEE. One end of the third secondary winding of the control power transformer B is connected to one end of the normally closed contact KM-42 of the AC contactor, and the other end of the normally closed contact KM-42 of the AC contactor is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the common end KB-2 of the magnetic latching relay, and the magnetic latching relay set contact KB-2S is connected to one end of the normally closed contact KM-22 of the AC contactor and the coil of the closing position signal relay KS2 The positive pole of the magnetic latching relay reset contact KB-2R is connected to one end of the normally closed contact KM-32 of the AC contactor and the negative pole of the coil of the opening position signal relay KS1. The other end of the normally closed contact KM-22 of the AC contactor is divided into two paths, one of which is connected to one end of the motor working ammeter A, and the other is connected to the common end of the moving contact KV-1 of the large current voltage relay after passing through the zero-sequence sensor IO. The normally closed contact of the moving contact KV-1 of the large current voltage relay is connected to the auxiliary switch circuit of the motor through the second core of the 5-core cable, and the normally open contact of the moving contact KV-1 of the large current voltage relay is connected to the negative pole of the coil of the closing position signal relay KS2, and is connected to the auxiliary switch circuit of the motor through the fourth core of the 5-core cable.The L1, L2, and L3 lines of the external three-phase AC power supply are connected to the power supply side of the AC contactor main contact KM-11 through the circuit breaker QF. The other end of the motor working ammeter A is connected to the L2 line on the load side of the AC contactor main contact KM-11. The other end of the AC contactor normally closed contact KM-32 is divided into two paths, one of which is connected to the L3 line on the load side of the AC contactor main contact KM-11, and the other is connected to the common end of the large current voltage relay moving contact KV-2 after passing through the zero-sequence sensor IO. The normally closed contact of the large current voltage relay moving contact KV-2 is connected to the positive pole of the opening position signal relay KS1 coil, and is connected to the motor auxiliary switch circuit through the 5th core of the 5-core cable. The large current voltage relay moving contact KV- The normally open contact of 2 is connected to the motor auxiliary switch circuit through the third core of the 5-core cable, and the other end of the third secondary winding of the control power transformer B is connected to one end of the normally closed contact KM-12 of the AC contactor. The other end of the normally closed contact KM-12 of the AC contactor is divided into two paths, one of which is connected to the L1 line on the load side of the AC contactor main contact KM-11, and the other is connected to one end of the current coil of the voltage and current two-phase relay KVA. The other end of the current coil of the voltage and current two-phase relay KVA passes through the zero-sequence sensor IO and is connected to the motor auxiliary switch circuit through the first core of the 5-core cable. The current coil of the voltage and current two-phase relay KVA is also connected to the output end of the zero-sequence sensor IO. The zero-sequence sensor IO has a protection function when running in the missing phase.

[0011] In another specific embodiment of the present invention, the motor auxiliary switch circuit includes a motor M, a diode D3, an opening position switch SP1, a closing position switch SP2, a rotating porcelain bottle opening position magnetic induction switch SP3, a rotating porcelain bottle closing position magnetic induction switch SP4 and a resistor R2, the diode D3 is used to generate an opening and closing position signal, the motor M is a three-phase AC drive motor, the W terminal of the motor M is connected to one end of the closing position switch normally closed contact SP2-32 and one end of the opening position switch normally closed contact SP1-12, the closing position switch normally closed contact SP2 -32 is connected to the fifth core of the five-core cable, the other end of the normally closed contact SP1-12 of the opening position travel switch is connected to the fourth core of the five-core cable, the V terminal of the motor M is connected to one end of the normally closed contact SP1-22 of the opening position travel switch, one end of the normally closed contact SP2-22 of the closing position travel switch, one end of the normally open contact SP1-21 of the opening position travel switch and one end of the normally open contact SP2-11 of the closing position travel switch, the other end of the normally closed contact SP1-22 of the opening position travel switch is connected to one end of the normally open contact SP3-11 of the magnetic induction switch of the rotating porcelain bottle opening position, and connected together The third core of the 5-core cable, the other end of the normally open contact SP3-11 of the rotating porcelain bottle open-in-place magnetic induction switch is connected to one end of the normally open contact SP1-11 of the open-in-place travel switch, the other end of the normally open contact SP1-11 of the open-in-place travel switch is connected to one end of the normally closed contact SP2-12 of the close-in-place travel switch, the other end of the normally closed contact SP2-12 of the close-in-place travel switch is connected to one end of the resistor R2 and the other end of the normally open contact SP2-11 of the close-in-place travel switch, the other end of the resistor R2 is connected to the positive electrode of the diode D3, and the negative electrode of the diode D3 is connected to the other end of the normally open contact SP1-21 of the open-in-place travel switch And one end of the normally open contact SP2-21 of the closing position travel switch, the other end of the normally open contact SP2-21 of the closing position travel switch is connected to one end of the normally closed contact SP1-22 of the opening position travel switch, the other end of the normally closed contact SP1-22 of the opening position travel switch is connected to one end of the normally open contact SP4-11 of the rotating porcelain bottle closing position magnetic induction switch, the other end of the normally open contact SP4-11 of the rotating porcelain bottle closing position magnetic induction switch is connected to the other end of the normally closed contact SP2-22 of the closing position travel switch, and are connected together to the second core of the 5-core cable, and the U terminal of the motor M is connected to the first core of the 5-core cable.

[0012] In a further specific embodiment of the present invention, the opening position signal relay KS1 and the closing position signal relay KS2 are current type unipolar relays, wherein the opening position signal relay KS1 only works normally under unidirectional reverse polarity current input, and the closing position signal relay KS2 is normally attracted only under unidirectional positive polarity current input. If the input current polarity is opposite or AC current is input, the opening position signal relay KS1 and the closing position signal relay KS2 are disconnected.

[0013] In a more specific embodiment of the present invention, the voltage-current two-phase relay KVA has an overcurrent alarm and protection function, which is energized when any input parameter of current or voltage reaches a specified value. When the input current is higher or lower than a preset value, it automatically enters the protection state after a delay and outputs an alarm.

[0014] In yet another specific embodiment of the present invention, the magnetic latching relay K is a bistable relay.

[0015] In yet another specific embodiment of the present invention, in the mechanism box of the electric operating mechanism, the motor M and the output shaft of the electric operating mechanism are connected through a constant torque connector CMC, which is used to self-protect the electrical control module when the output shaft of the electric operating mechanism of the high-voltage disconnect switch is obstructed from normal opening or closing.

[0016] Due to the adoption of the above structure, the present invention has the following beneficial effects compared with the prior art: firstly, the motor auxiliary switch circuit is retained in the mechanism box of the outdoor electric operating mechanism, and the electrical control module is arranged in the control cabinet of the indoor high-voltage isolating switch. The electrical control module and the motor auxiliary switch circuit are separately arranged, so that the electrical control module with the low-voltage electric operating mechanism components can be separated from the integrated chassis originally placed outdoors and moved indoors, and multiple electrical control modules can be centrally arranged in the indoor high-voltage isolating switch control cabinet, which is more convenient for centralized observation and control; the separately arranged structure can also completely eliminate the possibility of strong electromagnetic interference in the intelligent module, and solve the safety and reliability problems of the intelligent module that may exist in the electric operating mechanism of the high-voltage isolating switch under strong electromagnetic interference; secondly, the electrical control module and the motor auxiliary switch circuit are connected by a 5-core cable, and the motor operation control and the transmission of the opening and closing position signal of the electric operating mechanism reuse the 5-core cable, and the number of cable cores is much smaller than the number of cables connecting the electric operating mechanism of the traditional high-voltage isolating switch and the control center. The number of cores of the connecting cable of the traditional integrated high-voltage isolating switch electric operating mechanism is counted into the power line, the remote signal indication line, The remote transmission opening and closing action control line requires at least ten-core cables, and according to the principle of separation of strong and weak electricity, at least two cables are required to complete all connections. If intelligent requirements are incorporated, the number of cable cores will increase; the power supply mode of the opening and closing action drive motor concentrated in the outdoor mechanism box adopts DC 110V, 220V power supply or three-phase AC 380V power supply, and the power supply mode of the opening and closing signal indication circuit adopts AC 110V or 220V power supply. Under strong electromagnetic interference conditions such as strong thunderstorms, its safety and reliability are dozens of times higher than that of weak current components. At the same time, the components in the outdoor mechanism box can withstand high temperature and high Long-term reliable operation under humid environmental conditions further improves the safety and reliability of the long-term operation of the electric operating mechanism of the high-voltage disconnector; thirdly, the opening and closing signal indication circuit of the outdoor mechanism box is directly powered by an AC 110V or AC 220V power supply, and the opening position travel switch SP1, the closing position travel switch SP2 and the diode D3 form a closed current loop of the signal circuit through the 3-core cable in the indoor and outdoor connecting cable. The signal circuit composed of the closed current loop has a low input impedance. This structure is dozens of times better than the signal circuit composed of a closed voltage loop in terms of electromagnetic compatibility and the safety and reliability of the entire life cycle;Fourthly, the voltage and current two-phase relay KVA has overcurrent alarm and protection functions. It is energized when any input parameter of current or voltage reaches the specified value. When the input current is higher or lower than the preset value, it automatically enters the protection state after a delay and outputs an alarm. When the outdoor mechanism box selects the three-phase AC motor drive scheme, the zero-sequence sensor signal output end is connected to the voltage and current two-phase relay KVA, so that the voltage and current two-phase relay KVA can force the AC contactor KM to release when the motor is running in the phase loss. When the DC motor drive scheme is selected, the electrical control module has no zero-sequence sensor. Therefore, the reference of the voltage and current two-phase relay KVA can make the outdoor mechanism box enter the self-protection state when subjected to external majeure, protect the high-voltage disconnector electric operating mechanism, and avoid the expansion of the fault; Fifthly, the electrical control module adopts the magnetic holding relay KB, which is a A bistable relay, the working state of its contacts remains stable under strong electromagnetic interference conditions such as strong thunderstorms; Sixth, the electrical control module uses the opening position signal relay KS1 and the closing position signal relay KS2, which are current-type unipolar relays. The relays have extremely strong blocking and inhibitory effects on AC currents with a frequency of 50Hz and above. Under 110V and 220V AC input conditions, the opening position signal relay KS1 and the closing position signal relay KS2 contacts can be reliably separated. The opening position signal relay KS1 only works normally under unidirectional reverse polarity current input, and the closing position signal relay KS2 only closes normally under unidirectional positive polarity current input. If the input current polarity is opposite, the opening position signal relay KS1 and the closing position signal relay KS2 contacts can also be reliably separated. Therefore, in a strong electromagnetic interference environment, the failure rate of this type of relay is extremely low and the reliability is extremely high. ; BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an electrical schematic diagram of an embodiment of the present invention based on a DC motor drive solution;

[0018] Figure 2 This is an electrical schematic diagram of another embodiment of the present invention based on a three-phase AC induction motor drive solution.

[0019] In the figure: SP1. Opening position travel switch; SP2. Closing position travel switch; SP3. Rotating porcelain bottle opening position magnetic induction switch; SP4. Rotating porcelain bottle closing position magnetic induction switch; SP5. Manual electric transfer switch; KVA. Voltage and current two-phase relay; KB. Magnetic holding relay; KV. High current voltage relay; KT. Electronic time relay; KM. AC contactor; KS1. Opening position signal relay; KS2. Closing position signal relay; B. Control power transformer; LD1. Opening indicator light; LD2. Closing indicator light; LD3. Fault indicator light; K1. Maintenance protection switch; K2. External equipment interlock switch; K3. Remote opening control switch; K4. Remote closing control switch; KK. Manual opening and closing control self-resetting switch; YK. Remote conversion combination switch; A. Motor working ammeter; U1. Main DC regulated power supply; U2. Auxiliary DC regulated power supply; IO. Zero sequence sensor; M. Motor. DETAILED DESCRIPTION

[0020] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but the description of the embodiments is not a limitation of the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as the protection scope of the present invention.

[0021] In the following description, all concepts related to directionality (or orientation) such as up, down, left, right, front and back are referring to the position state of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be understood as special limitations on the technical solution provided by the present invention.

[0022] Embodiment 1:

[0023] See also Figure 1 , which illustrates the circuit schematic diagram of the electric operating mechanism of a centrally controlled high-voltage disconnector based on a DC motor drive solution.

[0024] The present invention relates to a centralized control type high-voltage isolating switch electric operating mechanism, which is connected to the main tool of the high-voltage isolating switch through a high-voltage porcelain bottle group. The mechanism includes a separately arranged electrical control module and a motor auxiliary switch circuit, wherein the motor auxiliary switch circuit is reserved and arranged in a mechanism box of the electric operating mechanism, and the mechanism box is located outdoors, and the electrical control module is centrally installed in a control cabinet of the high-voltage isolating switch or in an interval terminal box of an outdoor power supply unit, and the control cabinet is located in an indoor or outdoor terminal box with a perfect seal and an air conditioner. The electrical control module and the motor auxiliary switch circuit are separately arranged, so that the electrical control module with the low-voltage electric operating mechanism components can be separated from the integrated chassis originally placed outdoors and moved indoors, and multiple electrical control modules can be centrally arranged in the indoor high-voltage isolating switch control cabinet or the outdoor terminal box with a perfect seal and an air conditioner, which is more convenient for centralized observation and control; the separately arranged structure can also completely eliminate the possibility of strong electromagnetic interference in the intelligent module, and solve the safety and reliability problems of the intelligent module that may exist in the high-voltage isolating switch electric operating mechanism under the situation of strong electromagnetic interference.

[0025] The electrical control module is connected to the motor auxiliary switch circuit through a 5-core cable, and the motor operation control and the transmission of the opening and closing position signal of the electric operating mechanism reuse the 5-core cable. The number of cable cores is much smaller than the number of cables connecting the electric operating mechanism of the traditional high-voltage disconnector and the control center. The number of cores of the connecting cable of the traditional integrated high-voltage disconnector electric operating mechanism includes the power line, remote signal indication line, and remote opening and closing action control line. At least ten cores of cable are required, and according to the principle of separation of strong and weak electricity, at least two cables are required to complete all connections. If intelligent requirements are incorporated, the number of cable cores will increase.

[0026] Furthermore, the electrical control module includes a high-current voltage relay KV, a voltage-current two-phase relay KVA, a magnetic latching relay KB, an electronic time relay KT, an AC contactor KM, a motor working ammeter A, an opening position signal relay KS1, a closing position signal relay KS2, a manual opening and closing control self-resetting switch KK, a remote conversion combination switch YK, a maintenance protection switch K1, an external equipment interlock switch K2, a remote opening control switch K3, a remote closing control switch K4, an opening indicator light LD1, a closing indicator light LD2, a fault indicator light LD3, diodes D1, D2, a control power transformer B, a main DC regulated power supply U1, an auxiliary DC regulated power supply U2 and a resistor R, wherein the voltage-current two-phase relay KVA has an overcurrent alarm and protection function, and the electronic time relay KT has a short delay function.

[0027] The motor auxiliary switch circuit includes a motor M, a diode D3, an opening position travel switch SP1, a closing position travel switch SP2, a rotating porcelain bottle opening position magnetic induction switch SP3, a rotating porcelain bottle closing position magnetic induction switch SP4 and a manual electric conversion switch SP5. The diode D3 is used to generate an opening and closing position signal. In this embodiment, the motor M is a DC drive motor.

[0028] This embodiment uses a 110V DC motor drive and an AC 110V signal loop drive solution for illustration. The parameters in this embodiment are set as follows:

[0029] The control power transformer B is equivalent to the isolation transformer for signal loop power supply. The power supply voltage standard is 110V. The series resistance R of the signal loop is 1KΩ / 100W. The design rule of the resistance R is: Assuming that the five-core cable is short-circuited due to external force, the 110V AC voltage is fully applied to both ends of the resistance R. At this time, the electric power borne by the resistance R is:

[0030] P=U 2 / R=110 2 / 1K=12.1W

[0031] The power redundancy factor is taken as 25%, and the power of the resistor R is selected as 50W.

[0032] The diode D3 is a lightning protection rectifier module composed of a transient suppression diode 1.5KE-250A. Under strong electromagnetic interference conditions such as strong thunderstorms, when the reverse voltage exceeds 250V, the diode D3 conducts in the reverse direction to discharge overvoltage energy. The module can protect itself and be safe and reliable through transient energy discharge.

[0033] like Figure 1 As shown: the action flow of the electric operating mechanism in this embodiment is as follows.

[0034] Closing status indication:

[0035] When the mechanism box of the electric operating mechanism of the high-voltage disconnect switch is in the closing position, the closing position travel switch SP2 is pressed down, and the normally open contact SP4-11 of the rotating porcelain bottle closing position magnetic induction switch is turned on. The limited AC current first passes through the normally closed contact KM-22 of the AC contactor KM, and then passes through the closed normally open contact SP2-11 of the closing position travel switch, the closed normally open contact SP4-11 of the rotating porcelain bottle closing position magnetic induction switch, and the normally closed contact SP1-12 of the opening position travel switch, and then passes through the diode D3 for half-wave rectification, and then passes through the closed normally open contact S of the closing position travel switch in turn. P2-21, the normally closed contact KV-12 of the moving contact KV-1 of the high current voltage relay, the normally closed contact KM-12 of the AC contactor, and the set contact KB-2S of the magnetic latching relay are input to the closing position signal relay KS2 in the positive direction, and then return to the control power transformer B through the resistor R that acts as a current limiter. At this time, the current signal input to the closing position signal relay KS2 is a half-wave positive direction current signal, which meets the closing position signal relay KS2 pull-in condition. After the closing position signal relay KS2 is pulled in, the closing position signal relay KS2 contacts are closed, and the closing indicator light LD2 is lit. The closing indicator light LD2 is lit, indicating that the electric operating mechanism of the high-voltage disconnector has the conditions for switching from the closing position to the opening position.

[0036] The process of switching from closing to opening:

[0037] When the maintenance protection switch K1 and the external equipment interlock switch K2 are both turned on, select local manual conversion, that is, the remote conversion combination switch YK is placed in the "local" position (during remote conversion, the remote conversion combination switch YK is placed in the "remote" position), turn the manual opening and closing control self-resetting switch KK to the "open" position, and the opening contact terminals 1 and 2 are closed (during remote conversion, the remote control turns on the remote opening control switch K3), the voltage coil U of the voltage and current two-phase relay KVA is energized, the normally open contacts KVA-11 and KVA-21 of the voltage and current two-phase relay are closed, the reset coil 2R of the magnetic holding relay KB is energized, the reset contact KB-2R of the magnetic holding relay is connected to the opening position signal relay KS1 coil, the AC contactor KM coil is energized, and then the high current voltage relay KV coil is energized, and the normally open contact KV of the high current voltage relay moving contact KV-1 is closed. -11 and the normally open contact KV-21 of the moving contact KV-2 of the high-current voltage relay are connected. After the AC contactor KM coil is energized, the normally closed contacts KM-12 and KM-22 of the AC contactor are disconnected first, and the original closing signal indicates that the circuit path is cut off. Then the motor drives the working current from the closed AC contactor main contact KM-11 through the voltage and current two-phase relay KVA current coil I, the closed high-current voltage relay normally open contact KV-11 to the normally closed contact SP1-22 of the opening position travel switch, and flows into the motor M in the positive direction, and then returns to the negative pole of the power supply through the manual electric conversion switch normally closed contact SP5-11, the opening position travel switch normally closed contact SP1-32, the closed high-current voltage relay normally open contact KV-21, the motor working ammeter A, and the AC contactor main contact KM-11. After the motor circuit is connected, the motor M starts to run in the positive direction and performs the opening action.

[0038] After the motor M runs in the positive direction, current passes through the current coil I of the voltage and current two-phase relay KVA. When the DC drive motor M runs normally and the motor current works within a reasonable range, the voltage and current two-phase relay KVA is in an attracted and held state. At this time, even if the voltage coil of the voltage and current two-phase relay KVA is powered off, the voltage and current two-phase relay KVA will still be in an attracted and held state until the output shaft of the mechanism box rotates to the opening position card point, the opening action is completed, the opening position travel switch SP1 is pressed down, and the motor circuit is disconnected by the opening position travel switch normally closed contact SP1-22 and the opening position travel switch normally closed contact SP1-32. The working current path in the positive direction of the motor is cut off, the current coil I of the voltage and current two-phase relay KVA loses power, the voltage and current two-phase relay normally open contact KVA-21 is released, the AC contactor KM coil loses power, the AC contactor main contact KM-11 is disconnected, and the AC contactor normally closed contact KM-22 is connected. Prior to this, when the main shaft of the high-voltage disconnector electric operating mechanism leaves the closing position, the closing position travel switch SP2 is released.

[0039] Opening status indication:

[0040] When the mechanism box of the electric operating mechanism of the high-voltage disconnect switch is in the open position, the open position travel switch SP1 is pressed down, and the normally open contact SP3-11 of the rotating porcelain bottle open position magnetic induction switch is turned on, and the control power transformer B supplies power to the signal circuit. The limited AC current first passes through the normally closed contact KM-22 of the AC contactor, the closed normally open contact SP1-21 of the open position travel switch, the normally open contact SP3-11 of the rotating porcelain bottle open position magnetic induction switch, and the normally closed contact SP2-12 of the closed position travel switch, and then reversely passes through the diode D3 for half-wave rectification, and then passes through the closed normally open contact SP1-11 of the open position travel switch and the closed normally open contact KV-11 of the high-current voltage relay, and finally through the normally closed contact KM-12 of the AC contactor and the reset contact KB-2R of the magnetic holding relay, and is reversely input to the open position signal relay KS1, and then returns to the control power transformer B through the current limiting resistor R. At this time, the current signal input to the opening position signal relay KS1 is a half-wave negative direction current signal, which meets the closing condition of the opening position signal relay KS1, the opening position signal relay KS1 is closed, the opening position signal relay normally open contact KS1-21 is closed, and the opening indicator light LD1 is lit. The opening indicator light LD1 is lit, indicating that the high-voltage disconnector electric operating mechanism has the conditions for switching from the opening position to the closing position.

[0041] The process of switching from opening to closing:

[0042] The electric operating mechanism of the high-voltage disconnector is switched from the closed position to the open position, and the remote conversion combination switch YK is placed in the "local" position (when the remote conversion is performed, the remote conversion combination switch YK is placed in the "remote" position). When the maintenance protection switch K1 and the external equipment interlock switch K2 are both turned on, the manual opening and closing control self-resetting switch KK is turned to the "closed" position, and the closing contacts No. 3 and No. 4 are closed (when the remote conversion is performed, the remote control turns on the remote closing control switch K4), the voltage coil U of the voltage and current two-phase relay KVA is energized, the normally open contact KVA-11 of the voltage and current two-phase relay is closed, the setting coil S of the magnetic latching relay KB is energized, the setting contact KB-2S of the magnetic latching relay is turned on, the reset contact KB-1R of the magnetic latching relay is disconnected, the coil of the high-current voltage relay KV is de-energized, and the high-current voltage relay KV The normally closed contacts are closed; at the same time, the normally open contact KVA-21 of the voltage and current two-phase relay is closed, the AC contactor KM coil is energized, the normally closed contacts KM-22 and KM-12 of the AC contactor are disconnected first, and the original opening signal indicates that the circuit path is cut off. Then the main contact KM-11 of the AC contactor is closed, and the motor drive working current flows from the main contact KM-11 of the AC contactor through the current coil I of the voltage and current two-phase relay KVA, and then through the normally closed contact KV-12 of the high-current voltage relay to the normally closed contact SP2-22 of the closing position travel switch and the normally closed contact SP5-11 of the manual electric conversion switch, and then flows into the motor M in the opposite direction, and then returns to the negative pole of the power supply through the normally closed contact SP2-32 of the closing position travel switch, the normally closed contact KV-22 of the high-current voltage relay, the motor working ammeter A, and the main contact KM-11 of the AC contactor. After the motor circuit is connected, the coil of the voltage and current two-phase relay KVA is energized. At this time, even if the voltage coil U of the voltage and current two-phase relay KVA is de-energized, the voltage and current two-phase relay KVA will still remain in the attracted state until the output shaft of the mechanism box turns to the closing position, and the closing action is completed. When the closing position travel switch SP2 is pressed, the motor circuit is disconnected by the closing position travel switch normally closed contact SP2-22 and the closing position travel switch normally closed contact SP2-32, the reverse current path of the motor circuit is cut off, the current coil I of the voltage and current two-phase relay KVA loses power, the normally open contact KVA-21 of the voltage and current two-phase relay is released, the AC contactor KM coil loses power, the AC contactor main contact KM-11 is disconnected, and the AC contactor normally closed contacts KM-22 and KM-12 are closed. Before this, when the main shaft of the high-voltage disconnector electric operating mechanism leaves the opening position, the opening position travel switch SP1 is released, and now the closing position travel switch SP2 is pressed, and the AC contactor normally closed contact KM-22 is connected again, the motor action main circuit is powered off, and the closing position signal circuit is connected.

[0043] When the shaft of the mechanism box of the electric operating mechanism of the high-voltage disconnect switch is in the closing position again, the closing position travel switch SP2 is pressed down, and the normally open contact SP4-11 of the rotating porcelain bottle closing position magnetic induction switch is closed. The limited AC current first passes through the normally closed contact KM-22 of the AC contactor, and then passes through the closed normally open contact SP2-11 of the closing position travel switch, the normally open contact SP4-11 of the rotating porcelain bottle closing position magnetic induction switch, and the normally closed contact SP1-12 of the opening position travel switch, and then passes through the diode D3 for half-wave rectification, and then passes through the closed closing position travel switch normally closed contact KM-22. The open contact SP2-21, the normally closed contact KV-12 of the high current voltage relay, and finally the normally closed contact KM-12 of the AC contactor and the set contact KB-2S of the magnetic latching relay are input to the closing position signal relay KS2, and then returned to the control power transformer B through the resistor R. At this time, the current signal input to the closing position signal relay KS2 is a half-wave positive direction current signal, which meets the closing position signal relay KS2 pull-in condition, the closing position signal relay KS2 is pulled in, the normally closed contact KS2-21 of the closing position signal relay is closed, and the closing indicator light LD2 is lit. The closing indicator light LD2 is lit, indicating that the electric operating mechanism of the high-voltage disconnector has the conditions for switching from the closing position to the opening position.

[0044] The above is the action flow of the electric operating mechanism based on DC motor drive of Example 1 of the present invention, which describes in detail the whole process of an action cycle from closing position → opening action → opening position → closing action → closing position. The subsequent actions are the repetition of the above action cycle.

[0045] Embodiment 2:

[0046] This embodiment selects a three-phase AC induction motor and a signal circuit of AC 220V for explanation. Compared with the embodiment 1, the electrical control module further includes a zero-sequence sensor 10; the motor auxiliary switch circuit omits the manual electric conversion switch SP5.

[0047] The parameters in the specific embodiment of the present invention are set as follows:

[0048] The control power transformer B is equivalent to the isolation transformer for the signal loop power supply. The power supply voltage standard is 220V. The signal loop series resistor R1 is 2KΩ / 100W. The design rule of resistor R1 is: Assuming that the 5-core cable is short-circuited due to external force, the 220V AC voltage is fully applied to both ends of resistor R1. At this time, the power borne by resistor R1 is:

[0049] P=U 2 / R=220 2 / 2K=24.2W

[0050] The power redundancy factor is taken as 25%, and the power of resistor R1 is selected as 100W.

[0051] The diode D3 is composed of a lightning protection rectifier module composed of a transient suppression diode 1.5KE-440A. Under strong electromagnetic interference conditions such as strong thunderstorms, when the reverse voltage exceeds 440V, the diode D3 conducts in the reverse direction to discharge overvoltage energy. The module can protect itself and be safe and reliable through transient energy discharge.

[0052] Furthermore, the motor M is connected to the output shaft of the electric operating mechanism via a constant torque connector CMC, which is used to self-protect the electrical control module when the output shaft of the electric operating mechanism of the high-voltage disconnect switch is obstructed from normal opening or closing.

[0053] like Figure 2 As shown, the action flow of the electric operating mechanism in this embodiment is as follows.

[0054] When the mechanism box of the electric operating mechanism of the high-voltage disconnect switch is in the closing position, the closing position travel switch SP2 is pressed down, the rotating porcelain bottle closing position magnetic induction switch normally open contact SP4-11 is connected, the opening position travel switch SP1 is released, and the rotating porcelain bottle opening position magnetic induction switch normally open contact SP3-11 is closed.

[0055] Closing status indication:

[0056] In this embodiment, the current path of the closing signal is as follows.

[0057] When the same-name terminal outputs positive half-cycle current, the positive current starts from the same-name terminal, first passes through the normally closed contact KM-12 of the AC contactor, then passes through the current coil I of the voltage-current two-phase relay KVA, and the U-phase coil of the motor M, and reaches the neutral point of the motor M. Starting from this node, the current path is divided into two. One of the current paths passes through the V-phase coil of the motor M, the normally open contact SP2-11 of the closing position travel switch, the resistor R2, and flows in the positive direction through the diode D3 for rectification, and then passes through the normally open contact SP2-21 of the closing position travel switch and the normally closed contact SP1- 22. When the rotating porcelain bottle is in full-close position, the normally open contact SP4-11 of the magnetic induction switch, the normally closed contact KV-12 of the high-current voltage relay, and the normally closed contact KM-22 of the AC contactor reach the set contact of the magnetic latching relay KB-2S. Another path passes through the W-phase coil of the motor M, the normally closed contact SP1-12 of the opening position travel switch, and the reverse direction passes through the closing position signal relay KS2 and also reaches the set contact KB-2S of the magnetic latching relay. Finally, after merging, it passes through the current-limiting resistor R1 and the normally closed contact KM-42 of the AC contactor and returns to the coil of the control power transformer B. Since the reverse state of the resistor R2 and the diode D3 is low impedance compared to the closing position signal relay KS2, the forward path of the resistor R2 and the diode D3 is similar to the short-circuit state for the signal current. When the positive current starting from the same-name end actually flows into the closing position signal relay KS2 in the reverse direction, the current of the branch is negligible.

[0058] When the same-name terminal outputs a negative half-cycle current, the positive current starts from the opposite-name terminal, first passes through the normally closed contact KM-42 of the AC contactor, the resistor R1, the set contact KB-2S of the magnetic latching relay, and then flows in the positive direction through the closing position signal relay KS2, and then passes through the normally closed contact SP1-12 of the opening position travel switch, the W-phase coil and U-phase coil of the motor M, and the current coil I of the voltage-current two-phase relay KVA, and finally returns to the same-name terminal of the control power transformer B. At this time, another branch in the current path is from the normally closed contact KM-22 of the AC contactor to the normally closed contact KV-12 of the high-current voltage relay. This branch is cut off because the direction of the diode D3 in it is opposite to the current direction. The current path through the closing position signal relay KS2 is the only path for the positive current to start from the opposite-name terminal.

[0059] Furthermore, the current flowing into the closing position signal relay KS2 is superimposed with positive and negative half cycles. Because the reverse current is short-circuited when the same-name terminal is positive, the inflow current is approximately zero; when the same-name terminal is negative, the current flows into the closing position signal relay KS2 in the positive direction, the full-cycle current wave is synthesized, the input current of the closing position signal relay KS2 is still a positive pulsating current, the closing position signal relay KS2 is energized, and the closing indicator light LD2 indicates normally. The closing indicator light LD2 is lit, indicating that the electric operating mechanism of the high-voltage disconnector has the conditions for switching from the closing position to the opening position.

[0060] Switching from closed position to open position:

[0061] When the maintenance protection switch K1 and the external equipment interlock switch K2 are both turned on, select local manual conversion, that is, the remote conversion combination switch YK is placed in the "local" position (during remote conversion, the remote conversion combination switch YK is placed in the "remote" position), turn the manual opening and closing control self-resetting switch KK to the "open" position, and the opening contact terminals 1 and 2 are closed (during remote conversion, the remote control makes the remote opening control switch K3 closed), the voltage coil U of the voltage and current two-phase relay KVA is energized, the normally open contacts KVA-11 and KVA-21 of the voltage and current two-phase relay are closed, the reset coil R of the magnetic holding relay KB is energized, and the reset contact KB-2R of the magnetic holding relay is closed and connected to the opening position signal relay KS 1 coil, the AC contactor KM coil is energized, and then the high-current voltage relay KV coil is energized, and the high-current voltage relay normally open contacts KV-11 and KV-21 are closed; after the AC contactor KM coil is energized, the AC contactor normally closed contacts KM-12, KM-22, KM-32 and KM-42 are disconnected first, and the original closing signal indicates that the circuit path is cut off, and then the AC contactor main contact KM-11 is connected, and the three-phase motor drive current flows from the current coil I of the voltage-current two-phase relay KVA, the high-current voltage relay normally open contact KV-11, and the high-current voltage relay normally open contact KV-21 in the three-phase reverse phase sequence of L1→U, L2→W, and L3→V into the motor M, and the motor M starts to run in the reverse direction and enters the open operation state.

[0062] After the motor M runs in the reverse direction, the current on the L1 line of the three-phase power supply passes through the current coil I of the voltage and current two-phase relay KVA. As long as the motor M runs normally and the motor current works within a reasonable range, the voltage and current two-phase relay KVA is in an energized and held state. At this time, even if the voltage coil U of the voltage and current two-phase relay KVA is powered off, the voltage and current two-phase relay KVA will still be in an energized and held state until the output shaft of the mechanism box rotates to the opening position card point, and the opening action is completed. The opening position travel switch SP1 is pressed down, and the motor circuit is disconnected by the normally closed contacts SP1-12 and SP1-22 of the opening position travel switch, and the reverse working current path of the motor is cut off. The current coil I of the voltage and current two-phase relay KVA loses power, the normally closed contact KVA-12 of the voltage and current two-phase relay closes, and the normally open contact KVA-21 of the voltage and current two-phase relay is released. The coil of the AC contactor KM loses power, the main contact KM-11 of the AC contactor is disconnected, and the normally closed contacts KM-12, KM-22, KM-32 and KM-42 of the AC contactor are closed.

[0063] Before this, when the main shaft of the high-voltage disconnector electric operating mechanism leaves the closing position, the closing position travel switch SP2 is released. When the mechanism box of the high-voltage disconnector electric operating mechanism is in the opening position, the opening position travel switch SP1 is pressed down, and the rotating porcelain bottle opening position magnetic induction switch normally open contact SP3-11 is connected.

[0064] Opening status indication:

[0065] In this embodiment, the current path of the opening signal is as follows.

[0066] When the same-name terminal outputs a positive half-cycle current, the positive current starts from the same-name terminal, first passes through the normally closed contact KM-12 of the AC contactor, then passes through the current coil I of the voltage-current two-phase relay KVA, and the U-phase coil of the motor M, and reaches the neutral point of the motor M. Starting from this node, the current path is divided into two. One current passes through the W-phase coil of the motor M, the normally closed contact SP2-32 of the closing position switch, and then flows into the opening position signal relay KS1 coil in the positive direction. The other current passes through the V-phase coil of the motor M, the normally open contact SP1-21 of the opening position switch to the negative pole of the diode D3, and the diode D3 is cut off at this time.

[0067] When the same-name end outputs a negative half-cycle current, the positive current starts from the opposite-name end, first passes through the normally closed contact KM-42 of the AC contactor, the resistor R1, and the reset contact KB-2R of the magnetic latching relay, and then from this node, the current path is divided into two. One branch current passes through the normally closed contact KM-32 of the AC contactor, the normally open contact KV-21 of the closed high-current voltage relay, the normally open contact SP3-11 of the rotating porcelain bottle open-in-place magnetic induction switch, and the normally open contact SP1-11 of the open-in-place travel switch, and then passes through the normally closed contact SP2-12 of the closed-in-place travel switch, the resistor R2, and then flows into the diode D3 from the positive direction, and then passes through the normally open contact of the closed open-in-place travel switch. Point SP1-21, the V-phase coil of motor M, the U-phase coil of motor M, the current coil I of the voltage-current two-phase relay KVA, the normally closed contact KM-12 of the AC contactor, and finally return to the same-name end of the control power transformer B; the other branch current first flows in the opposite direction through the coil of the opening position signal relay KS1, the normally closed contact SP2-32 of the closing position travel switch, and then passes through the W-phase coil of motor M to the neutral point and meets the other branch. Because the resistor R2 and the diode D3 branch are turned on in the positive direction of the diode D3, the internal resistance is extremely small, so the current mainly leaks from the branch of the diode D3, and the current flowing through the coil of the opening position signal relay KS1 can be ignored.

[0068] Furthermore, the current flowing into the coil of the opening position signal relay KS1 is superimposed with positive and negative half cycles. When the same-name terminal is negative, the reverse current is short-circuited by the diode D3, and the inflow current is approximately zero; when the same-name terminal is positive, the current flows into the coil of the opening position signal relay KS1 in the positive direction. Therefore, the input current of the opening position signal relay KS1 is still an effective unidirectional pulsating current after full-wave synthesis, and the opening position signal relay KS1 is energized, and the opening indicator light LD1 indicates normally. The opening indicator light LD1 is lit, indicating that the electric operating mechanism of the high-voltage disconnector has the conditions for switching from the opening position to the closing position.

[0069] Switching from the open position to the closed position:

[0070] When the maintenance protection switch K1 and the external equipment interlock switch K2 are both turned on, select local manual conversion, that is, the remote conversion combination switch YK is placed in the "local" position (when converting remotely, the remote conversion combination switch YK is placed in the "remote" position), turn the manual opening and closing control self-resetting switch KK to the "closing" position, and the closing contacts 3 and 4 are closed (when converting remotely, the remote control closes the remote closing control switch K4), the voltage coil U of the voltage-current two-phase relay KVA is energized, the normally open contact KVA-11 of the voltage-current two-phase relay is closed, the normally open contact KVA-21 of the voltage-current two-phase relay is closed, the setting coil S of the magnetic latching relay KB is energized, the coil of the AC contactor KM is energized, and then the reset contact KB-1R of the magnetic latching relay is disconnected, The coil of the high-current voltage relay KV is de-energized, the normally closed contact KV-12 of the high-current voltage relay is closed, and the normally closed contact KV-22 of the high-current voltage relay is closed. At the same time, after the coil of the AC contactor KM is energized, the normally closed contacts KM-12, KM-22, KM-32 and KM-42 of the AC contactor are disconnected first, and the path of the original opening signal indication circuit is cut off. Then the main contact KM-11 of the AC contactor is turned on, and the three-phase motor drive current flows from the current coil I of the voltage-current two-phase relay KVA, the normally closed contact KV-12 of the high-current voltage relay, and the normally closed contact KV-22 of the high-current voltage relay into the motor M in the three-phase forward phase sequence direction of L1→U, L2→V, and L3→W. The motor M starts to run in the forward direction and enters the closed operation state.

[0071] After the motor M runs in the forward direction, the L1 line current of the three-phase power supply passes through the current coil I of the voltage and current two-phase relay KVA. As long as the motor M runs normally and the motor current works within a reasonable range, the voltage and current two-phase relay KVA will remain in the energized state. At this time, even if the voltage coil U of the voltage and current two-phase relay KVA is powered off, the voltage and current two-phase relay KVA can still be in the energized and maintained state until the output shaft of the mechanism box rotates to the closing position card point, and the closing action is completed. The closing position travel switch SP2 is pressed down, and the motor circuit is disconnected by the closing position travel switch normally closed contacts SP2-22 and SP2-32, and the motor forward working current path is cut off, and the voltage and current two-phase relay KVA current coil I loses power.

[0072] The moving contact KVA-1 of the voltage and current two-phase relay switches from the normally open contact to the normally closed contact, the normally open contact KVA-21 of the voltage and current two-phase relay is released, the AC contactor KM coil loses power, the AC contactor main contact KM-11 is disconnected, and the AC contactor normally closed contacts KM-12, KM-22, KM-32 and KM-42 are closed.

[0073] Before this, when the main shaft of the high-voltage disconnector electric operating mechanism leaves the opening position, the opening position travel switch SP1 is released. When the mechanism box of the high-voltage disconnector electric operating mechanism is in the closing position, the closing position travel switch SP2 is pressed down, and the normally open contact SP4-11 of the rotating porcelain bottle closing position magnetic induction switch is closed. At this time, the present embodiment returns to the closing state, and the closing indicator light LD2 is re-lit. The closing indicator light LD2 is lit, indicating that the high-voltage disconnector electric operating mechanism has the conditions for switching from the closing position to the opening position.

[0074] The above is the action flow of the electric operating mechanism in Embodiment 2 of the present invention based on the three-phase AC induction motor drive, which describes in detail the whole process of an action cycle from closing position → opening action → opening position → closing action → closing position. The subsequent actions are the repetition of the above action cycle.

[0075] The operation modes in the above two embodiments are both set to the manual operation mode of the "local" state. If the mode needs to be switched to the "remote" mode, remote control can be achieved by operating the corresponding remote opening control switch K3 and remote closing control switch K4. Furthermore, if the remote opening control switch K3 and the remote closing control switch K4 are changed to intelligent modules, remote intelligent control can be achieved.

[0076] In the above two embodiments, the power supply mode of the opening and closing action driving motor concentrated in the outdoor mechanism box adopts a DC 110V, 220V power supply or a three-phase AC 380V power supply, and the power supply mode of the opening and closing signal indication circuit adopts an AC 110V or 220V power supply. Under strong electromagnetic interference conditions such as strong thunderstorms, its safety and reliability are dozens of times higher than those of weak current components. At the same time, the components in the outdoor mechanism box can work reliably for a long time under high temperature and high humidity environmental conditions, further improving the safety and reliability of the long-term operation of the electric operating mechanism of the high-voltage disconnector. The signal circuit closed current loop is formed by the opening position travel switch SP1, the closing position travel switch SP2 and the diode D3 through the 3-core cable in the indoor and outdoor connecting cable line. The signal circuit composed of the closed current loop has a low input impedance. This structure is dozens of times higher than the signal circuit composed of the closed voltage loop in terms of electromagnetic compatibility and safety and reliability throughout the life cycle.

[0077] The voltage and current two-phase relay KVA has overcurrent alarm and protection functions. It is energized when any input parameter of current or voltage reaches a specified value. When the input current is higher or lower than a preset value, it automatically enters a protection state after a delay and outputs an alarm. When the three-phase AC motor drive scheme is selected for the outdoor mechanism box, the zero-sequence sensor signal output end is connected to the voltage and current two-phase relay KVA, so that the voltage and current two-phase relay KVA can force the AC contactor KM to release when the motor is running in the phase loss. When the DC motor drive scheme is selected, the electrical control module has no zero-sequence sensor. Therefore, the reference of the voltage and current two-phase relay KVA can enable the outdoor mechanism box to enter a self-protection state when subjected to external majeure, thereby protecting the high-voltage disconnector electric operating mechanism and avoiding the expansion of the fault.

[0078] The electrical control module adopts a magnetic latching relay KB, which is a bistable relay. Its contact working state remains stable under strong electromagnetic interference conditions such as strong thunderstorms. The electrical control module also adopts a switch-off position signal relay KS1 and a switch-on position signal relay KS2, which are current-type unipolar relays. The relays have extremely strong blocking and inhibitory effects on AC currents with a frequency of 50Hz and above. Under 110V and 220V AC input conditions, the switch-off position signal relay KS1 and the switch-on position signal relay KS2 contacts can be reliably separated. The switch-off position signal relay KS1 only works normally under unidirectional reverse polarity current input, and the switch-on position signal relay KS2 is normally attracted only under unidirectional positive polarity current input. If the input current polarity is opposite, the switch-off position signal relay KS1 and the switch-on position signal relay KS2 contacts can also be reliably separated. Therefore, in a strong electromagnetic interference environment, the failure rate of this type of relay is extremely low and the reliability is extremely high.

[0079] The signal circuit designs for the closing state indication and the opening state indication in the above two embodiments effectively utilize the internal coils of the DC motor and the three-phase AC induction motor to form the opening and closing position signal indication circuit loop of the high-voltage disconnector. If the internal coils of the DC motor and the three-phase AC induction motor are broken, the signal circuits for the closing state indication and the opening state indication cannot provide effective position signal currents for the opening position signal relay KS1 and the closing position signal relay KS2, and the opening and closing signal indication circuits fail accordingly, and the corresponding electrical control module generates a fault alarm signal. Compared with the traditional signal circuit design, the signal circuit design for the closing state indication and the opening state indication described in the present invention also has the function of detecting the motor coil, which can help the monitoring operator of the high-voltage power grid to effectively monitor the equipment safety and operating status of the electric operating mechanism of the centralized control type high-voltage disconnector described in the present invention, and prevent potential safety accidents.

Claims

1. A centrally controlled high-voltage disconnector electric operating mechanism, characterized in that: It includes a separately arranged electrical control module and a motor auxiliary switch circuit. The motor auxiliary switch circuit is retained in a mechanism box of an electric operating mechanism, and the mechanism box is located outdoors. The electrical control module is arranged in a control cabinet of a high-voltage disconnector, and the control cabinet is located indoors. The electrical control module and the motor auxiliary switch circuit are connected via a multi-core cable, and the multi-core cable is multiplexed for the transmission of motor operation control and opening and closing position signals of the electric operating mechanism.

2. The centrally controlled high-voltage disconnector electric operating mechanism according to claim 1 is characterized in that: The multi-core cable is a 5-core cable.

3. The centrally controlled high-voltage disconnector electric operating mechanism according to claim 2 is characterized in that: The electrical control module includes a high-current voltage relay KV, a voltage-current two-phase relay KVA, a magnetic latching relay KB, an electronic time relay KT, an AC contactor KM, a motor working ammeter A, a switch-off position signal relay KS1, a switch-on position signal relay KS2, a manual switch-off control self-resetting switch KK, a remote conversion combination switch YK, a maintenance protection switch K1, an external device interlock switch K2, a remote switch-off control switch K3, a remote switch-on control switch K4, a switch-off indicator light LD1, a switch-on indicator light LD2, a fault indicator light LD3, diodes D1, D2, a control power transformer B, a main DC regulated power supply U1, an auxiliary DC regulated power supply U2 and a resistor R, wherein the The voltage and current two-phase relay KVA has overcurrent alarm and protection functions, the electronic time relay KT has a short delay function, one end of the coil of the high-current voltage relay KV is connected to one end of the reset contact KB-1R of the magnetic holding relay, one end of the voltage coil of the voltage and current two-phase relay KVA is connected to one end of the external device interlock switch K2, the other end of the external device interlock switch K2 is connected to one end of the maintenance protection switch K1, the other end of the voltage coil of the voltage and current two-phase relay KVA is connected to the common end of the high-current voltage relay moving contact KV-3, the normally closed contact KV-32 of the high-current voltage relay moving contact KV-3 is connected to the No. 1 terminal of the opening contact of the manual opening and closing control self-resetting switch KK, The cathode of diode D2 is connected to one end of the remote opening control switch K3, the No. 3 terminal of the closing contact of the manual opening and closing control self-resetting switch KK is connected to the normally open contact KV-31 of the large current voltage relay moving contact KV-3, the cathode of diode D1 and one end of the remote closing control switch K4, the anode of diode D1 is connected to one end of the setting coil S of the magnetic holding relay KB, the anode of diode D2 is connected to one end of the reset coil R of the magnetic holding relay KB, the other end of the reset coil R of the magnetic holding relay KB and the other end of the setting coil S are connected together to the normally open contact KVA-11 of the voltage and current two-phase relay moving contact KVA-1, the normally closed contact KVA-1 of the voltage and current two-phase relay moving contact KVA-1 Point KVA-12 is connected to one end of the normally closed contact KS1-21 of the opening position signal relay, the other end of the normally closed contact KS1-21 of the opening position signal relay is connected to one end of the normally closed contact KS2-21 of the closing position signal relay KS2, the other end of the normally closed contact KS2-21 of the closing position signal relay is connected to one end of the coil of the electronic time relay KT, the other end of the remote opening control switch K3 is connected to the other end of the remote closing control switch K4 and the No. 10 terminal of the remote contact of the remote conversion combination switch YK, the No. 12 terminal of the local contact of the remote conversion combination switch YK is connected to the No. 2 and No. 4 terminals of the opening and closing contacts of the manual opening and closing control self-resetting switch KK,One end of the opening indicator light LD1 is connected to one end of the opening position signal relay normally open contact KS1-21 of the opening position signal relay KS1, one end of the closing indicator light LD2 is connected to one end of the closing position signal relay normally open contact KS2-21 of the closing position signal relay KS2, one end of the fault indicator light LD3 is connected to one end of the time relay normally open contact KT-21, the other end of the opening position signal relay normally open contact KS1-21, the other end of the closing position signal relay normally open contact KS2-21, the other end of the time relay normally open contact KT-21, the common end of the voltage and current two-phase relay moving contact KVA-1, the other end of the magnetic holding relay reset contact KB-1R and the maintenance protection switch K 1 is connected to the DC power supply VDD, the other end of the opening indicator light LD1, the other end of the closing indicator light LD2, the other end of the fault indicator light LD3, the other end of the coil of the time relay KT, the other end of the coil of the high-current voltage relay KV, and the remote and local contacts 9 and 11 of the telecontrol conversion combination switch YK are grounded; one end of the main winding coil of the control power transformer B and one end of the coil of the AC contactor KM are connected to the N end of the power supply, the other end of the coil of the AC contactor KM is connected to one end of the normally open contact KVA-21 of the voltage and current two-phase relay, and the other end of the normally open contact KVA-21 of the voltage and current two-phase relay and the other end of the main winding coil of the control power transformer B are connected to the N end of the power supply. At the L end, the first secondary winding of the control power transformer B is connected to the main DC regulated power supply U1, and the main DC regulated power supply U1 provides a DC power supply VDD. The second secondary winding of the control power transformer B is connected to the auxiliary DC regulated power supply U2, and the auxiliary DC regulated power supply U2 provides a DC power supply VCC and a DC power supply VEE. One end of the third secondary winding of the control power transformer B is connected to one end of the resistor R, and the other end of the resistor R is respectively connected to the positive pole of the coil of the opening position signal relay KS1 and the negative pole of the coil of the closing position signal relay KS2, the negative pole of the coil of the opening position signal relay KS1 is connected to the reset contact KB-2R of the magnetic holding relay, and the positive pole of the coil of the closing position signal relay KS2 is connected to the set contact of the magnetic holding relay The contact KB-2S is connected, the common end KB-2 of the magnetic latching relay is connected to one end of the normally closed contact KM-12 of the AC contactor, the other end of the normally closed contact KM-12 of the AC contactor is connected to one end of the current coil I of the voltage and current two-phase relay KVA and the common end of the moving contact KV-1 of the high-current voltage relay, the other end of the current coil I of the voltage and current two-phase relay KVA is connected to one end of the main contact KM-11 of the AC contactor, the other end of the main contact KM-11 of the AC contactor is connected to the positive pole of the power supply through the fuse 1RD, one end of the normally closed contact KV-12 of the high-current voltage relay and one end of the normally open contact KV-11 of the high-current voltage relay are connected to the motor auxiliary switch circuit through the 2nd and 1st cores of the 5-core cable respectively,The other end of the third secondary winding of the control power transformer B is connected to one end of the normally closed contact KM-22 of the AC contactor, and the other end of the normally closed contact KM-22 of the AC contactor is connected to the motor auxiliary switch circuit through the 5th core of the 5-core cable. One end of the motor working ammeter A is connected to one end of another AC contactor main contact KM-11, and the other end of the AC contactor main contact KM-11 is connected to the negative pole of the power supply through the fuse 2RD. The other end of the motor working ammeter A is connected to the common end of the moving contact KV-2 of the large current voltage relay, and the normally closed contact KV-22 and the normally open contact KV-21 of the moving contact KV-2 of the large current voltage relay are connected to the motor auxiliary switch circuit through the 4th and 3rd cores of the 5-core cable respectively.

4. The centrally controlled high-voltage disconnector electric operating mechanism according to claim 3 is characterized in that: The motor auxiliary switch circuit includes a motor M, a diode D3, a switch in place travel switch SP1, a switch in place travel switch SP2, a rotating porcelain bottle switch in place magnetic induction switch SP3, a rotating porcelain bottle switch in place magnetic induction switch SP4 and a manual electric conversion switch SP5. The diode D3 is used to generate a switch opening and closing position signal. The motor M is a DC drive motor. One end of the switch in place travel switch normally open contact SP1-11 is connected to one end of the switch in place travel switch normally closed contact SP1-22, and they are connected together to the first core of the 5-core cable. The other end of the switch in place travel switch normally open contact SP1-11 is connected to the switch in place. One end of the normally closed contact SP1-12 of the in-position travel switch is connected to the positive pole of the diode D3, the other end of the normally closed contact SP1-12 of the open-position travel switch is connected to one end of the normally open contact SP4-11 of the rotating porcelain bottle closed-position magnetic induction switch, the other end of the normally open contact SP4-11 of the rotating porcelain bottle closed-position magnetic induction switch is connected to one end of the normally open contact SP2-11 of the closed-position travel switch, the other end of the normally open contact SP2-11 of the closed-position travel switch is connected to one end of the normally open contact SP1-21 of the open-position travel switch, and the 5th core of the 5-core cable is connected together, and the normally open contact SP1-21 of the open-position travel switch is connected to the 5th core of the 5-core cable. The other end of is connected to one end of the normally open contact SP3-11 of the rotating porcelain bottle opening position magnetic induction switch, the other end of the normally open contact SP3-11 of the rotating porcelain bottle opening position magnetic induction switch is connected to one end of the normally closed contact SP2-12 of the closing position travel switch, the other end of the normally closed contact SP2-12 of the closing position travel switch is connected to the cathode of the diode D3 and one end of the normally open contact SP2-21 of the closing position travel switch, the other end of the normally open contact SP2-21 of the closing position travel switch is connected to one end of the normally closed contact SP2-22 of the closing position travel switch, and are connected together to the second core of the 5-core cable, and the closing position travel switch is normally closed. The other end of contact SP2-22 is connected to one end of the normally closed contact SP5-11 of the manual electric transfer switch and one end of the normally closed contact SP1-32 of the opening position travel switch. The other end of the normally closed contact SP5-11 of the manual electric transfer switch is connected to one end of the motor M. The other end of the motor M is connected to the other end of the normally closed contact SP1-22 of the opening position travel switch and one end of the normally closed contact SP2-32 of the closing position travel switch. The other end of the normally closed contact SP2-32 of the closing position travel switch is connected to the 4th core of the 5-core cable, and the other end of the normally closed contact SP1-32 of the opening position travel switch is connected to the 3rd core of the 5-core cable.

5. The electric operating mechanism of a centralized controlled high-voltage disconnector according to claim 2 is characterized in that: The electrical control module includes a high-current voltage relay KV, a voltage-current two-phase relay KVA, a magnetic latching relay KB, an electronic time relay KT, an AC contactor KM, a motor working ammeter A, a switch-off position signal relay KS1, a switch-on position signal relay KS2, a manual switch-off control self-resetting switch KK, a remote conversion combination switch YK, a maintenance protection switch K1, an external device interlock switch K2, a remote switch-off control switch K3, a remote switch-on control switch K4, a switch-off indicator light LD1, a switch-on indicator light LD2, a fault indicator light LD3, diodes D1, D2, a control power transformer B, a main DC regulated power supply U1, an auxiliary DC regulated power supply U2, a resistor R1, a zero-sequence sensor IO and a three-phase circuit breaker. QF, wherein the voltage and current two-phase relay KVA has overcurrent alarm and protection functions, the electronic time relay KT has a short delay function, one end of the coil of the high-current voltage relay KV is connected to one end of the reset contact KB-1R of the magnetic holding relay, one end of the voltage coil U of the voltage and current two-phase relay KVA is connected to one end of the external device interlock switch K2, the other end of the external device interlock switch K2 is connected to one end of the maintenance protection switch K1, the other end of the voltage coil U of the voltage and current two-phase relay KVA is connected to the common end of the moving contact KV-3 of the high-current voltage relay, the normally closed contact KV-32 of the high-current voltage relay is connected to the No. 1 terminal of the opening contact of the manual opening and closing control self-resetting switch KK, and the negative electrode of the diode D2 And one end of the remote opening control switch K3, the No. 3 terminal of the closing contact of the manual opening and closing control self-resetting switch KK is connected to the normally open contact KV-31 of the large current voltage relay, the cathode of the diode D1 and one end of the remote closing control switch K4, the anode of the diode D1 is connected to one end of the setting coil S of the magnetic holding relay KB, the anode of the diode D2 is connected to one end of the reset coil R of the magnetic holding relay KB, the other end of the reset coil R of the magnetic holding relay KB and the other end of the setting coil S are connected to the normally open contact KVA-11 of the voltage and current two-phase relay, the normally closed contact KVA-12 of the voltage and current two-phase relay is connected to one end of the normally closed contact KS1-21 of the opening position signal relay, and the opening position signal relay The other end of the normally closed contact KS1-21 is connected to one end of the normally closed contact KS2-21 of the closing position signal relay KS2, the other end of the normally closed contact KS2-21 of the closing position signal relay is connected to one end of the coil of the electronic time relay KT, the other end of the remote opening control switch K3 is connected to the other end of the remote closing control switch K4 and the No. 10 terminal of the remote contact of the remote conversion combination switch YK, the No. 12 terminal of the local contact of the remote conversion combination switch YK is connected to the No. 2 and No. 4 terminals of the opening and closing contacts of the manual opening and closing control self-resetting switch KK, one end of the opening indicator light LD1 is connected to one end of the normally open contact KS1-21 of the opening position signal relay KS1,One end of the closing indicator light LD2 is connected to one end of the closing position signal relay normally open contact KS2-21 of the closing position signal relay KS2, one end of the fault indicator light LD3 is connected to one end of the time relay normally open contact KT-21, the other end of the opening position signal relay normally open contact KS1-21, the other end of the closing position signal relay normally open contact KS2-21, the other end of the time relay normally open contact KT-21, the common end of the voltage and current biphase relay moving contact KVA-1, the other end of the magnetic holding relay reset contact KB-1R and the other end of the maintenance protection switch K1 are connected to the DC power supply VDD, the other end of the opening indicator light LD1, the other end of the closing indicator light LD2, and the fault indicator light LD3 The other end of the coil of the time relay KT, the other end of the coil of the high-current voltage relay KV, and the No. 9 and No. 11 terminals of the remote and local contacts of the telecontrol conversion combination switch YK are grounded together; one end of the main winding coil of the control power transformer B and one end of the coil of the AC contactor KM are connected to the N end of the power supply, the other end of the coil of the AC contactor KM is connected to one end of the normally open contact KVA-21 of the voltage-current two-phase relay, the other end of the normally open contact KVA-21 of the voltage-current two-phase relay and the other end of the main winding coil of the control power transformer B are connected to the L end of the power supply, the first secondary winding of the control power transformer B is connected to the main DC regulated power supply U1, and the main DC regulated power supply U1 provides a DC power supply VDD , the second secondary winding of the control power transformer B is connected to the auxiliary DC regulated power supply U2, the auxiliary DC regulated power supply U2 provides DC power supply VCC and DC power supply VEE, one end of the third secondary winding of the control power transformer B is connected to one end of the normally closed contact KM-42 of the AC contactor, the other end of the normally closed contact KM-42 of the AC contactor is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the common end KB-2 of the magnetic latching relay, the magnetic latching relay set contact KB-2S is connected to one end of the normally closed contact KM-22 of the AC contactor and the positive pole of the closing position signal relay KS2 coil, the reset contact 2R of the moving contact is connected to one end of the normally closed contact KM-32 of the AC contactor and the open position signal relay KS1 line The negative pole of the coil is connected, and the other end of the normally closed contact KM-22 of the AC contactor is divided into two paths, one of which is connected to one end of the motor working ammeter A, and the other is connected to the common end of the large current voltage relay moving contact KV-1 after passing through the zero-sequence sensor IO. The normally closed contact KV-12 of the large current voltage relay moving contact KV-1 is connected to the motor auxiliary switch circuit through the second core of the 5-core cable, and the normally open contact KV-11 of the large current voltage relay moving contact KV-1 is connected to the negative pole of the closing position signal relay KS2 coil, and is connected to the motor auxiliary switch circuit through the fourth core of the 5-core cable. The L1, L2, and L3 lines of the external three-phase AC power supply are connected to the power supply side of the AC contactor main contact KM-11 through the circuit breaker QF.The other end of the motor working ammeter A is connected to the L2 line on the load side of the AC contactor main contact KM-11, and the other end of the AC contactor normally closed contact KM-32 is divided into two paths, one of which is connected to the L3 line on the load side of the AC contactor normally open contact KM-11, and the other is connected to the common end of the large current voltage relay moving contact KV-2 after passing through the zero-sequence sensor IO. The normally closed contact KV-22 of the large current voltage relay moving contact KV-2 is connected to the positive pole of the opening position signal relay KS1 coil, and they are connected to the motor auxiliary switch circuit through the 5th core of the five-core cable. The normally open contact KV-21 of the large current voltage relay moving contact KV-2 is connected to the positive pole of the opening position signal relay KS1 coil through the 3rd core of the five-core cable. The motor auxiliary switch circuit is connected, and the other end of the third secondary winding of the control power transformer B is connected to one end of the normally closed contact KM-12 of the AC contactor. The other end of the normally closed contact KM-12 of the AC contactor is divided into two paths, one of which is connected to the L1 line on the load side of the normally open contact KM-11 of the AC contactor, and the other is connected to one end of the current coil I of the voltage and current two-phase relay KVA. The other end of the current coil I of the voltage and current two-phase relay KVA passes through the zero-sequence sensor IO and is connected to the motor auxiliary switch circuit through the first core of the 5-core cable. The current coil of the voltage and current two-phase relay KVA is also connected to the output end of the zero-sequence sensor IO. The zero-sequence sensor IO has a protection function when running in the missing phase.

6. The centrally controlled high-voltage disconnector electric operating mechanism according to claim 5 is characterized in that: The motor auxiliary switch circuit includes a motor M, a diode D3, an opening position switch SP1, a closing position switch SP2, a rotating porcelain bottle opening position magnetic induction switch SP3, a rotating porcelain bottle closing position magnetic induction switch SP4 and a resistor R2. The diode D3 is used to generate an opening and closing position signal. The motor M is a three-phase AC drive motor. The W terminal of the motor M is connected to one end of the closing position switch normally closed contact SP2-32 and one end of the opening position switch normally closed contact SP1-12. The other end of the closing position switch normally closed contact SP2-32 is connected to the 5-core The 5th core of the cable and the other end of the normally closed contact SP1-12 of the opening position travel switch are connected to the 4th core of the 5-core cable. The V terminal of the motor M is connected to one end of the normally closed contact SP1-22 of the opening position travel switch, one end of the normally closed contact SP2-22 of the closing position travel switch, one end of the normally open contact SP1-21 of the opening position travel switch and one end of the normally open contact SP2-11 of the closing position travel switch. The other end of the normally closed contact SP1-22 of the opening position travel switch is connected to one end of the normally open contact SP3-11 of the magnetic induction switch of the rotating porcelain bottle opening position, and they are connected together to the 3rd core of the 5-core cable. The other end of the normally open contact SP3-11 of the rotating porcelain bottle's open position magnetic induction switch is connected to one end of the normally open contact SP1-11 of the open position travel switch, and the other end of the normally open contact SP1-11 of the open position travel switch is connected to one end of the normally closed contact SP2-12 of the closed position travel switch. The other end of the normally closed contact SP2-12 of the closed position travel switch is connected to one end of the resistor R2 and the other end of the normally open contact SP2-11 of the closed position travel switch. The other end of the resistor R2 is connected to the positive electrode of the diode D3, and the negative electrode of the diode D3 is connected to the other end of the normally open contact SP1-21 of the open position travel switch and the closed position. One end of the normally open contact SP2-21 of the travel switch is connected, the other end of the normally open contact SP2-21 of the closing position travel switch is connected to one end of the normally closed contact SP1-22 of the opening position travel switch, the other end of the normally closed contact SP1-22 of the opening position travel switch is connected to one end of the normally open contact SP4-11 of the rotating porcelain bottle closing position magnetic induction switch, the other end of the normally open contact SP4-11 of the rotating porcelain bottle closing position magnetic induction switch is connected to the other end of the normally closed contact SP2-22 of the closing position travel switch, and are connected together to the second core of the 5-core cable, and the U terminal of the motor M is connected to the first core of the 5-core cable.

7. A centrally controlled high-voltage disconnector electric operating mechanism according to claim 3 or 5, characterized in that: The opening position signal relay KS1 and the closing position signal relay KS2 are current type unipolar relays, wherein the opening position signal relay KS1 only works normally under unidirectional reverse polarity current input, and the closing position signal relay KS2 is normally attracted only under unidirectional positive polarity current input. If the input current polarity is opposite or AC current is input, the opening position signal relay KS1 and the closing position signal relay KS2 are disconnected.

8. A centrally controlled high-voltage disconnector electric operating mechanism according to claim 3 or 5, characterized in that: The voltage-current two-phase relay KVA has overcurrent alarm and protection functions. It is energized when any input parameter of current or voltage reaches a specified value. When the input current is higher or lower than a preset value, it automatically enters the protection state after a delay and outputs an alarm.

9. A centrally controlled high-voltage disconnector electric operating mechanism according to claim 3 or 5, characterized in that: The magnetic latching relay KB is a bistable relay.

10. A centrally controlled high-voltage disconnector electric operating mechanism according to claim 4 or 6, characterized in that: In the mechanism box of the electric operating mechanism, the motor M is connected to the output shaft of the electric operating mechanism through a constant torque connector CMC, which is used to self-protect the electrical control module when the output shaft of the electric operating mechanism of the high-voltage disconnect switch is obstructed in normal opening or closing.

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