Portable Voltage Terminal Monitoring and Acquisition Auxiliary Device

Abstract

The present invention discloses a portable voltage terminal monitoring and acquisition auxiliary device, which includes a 6-channel secondary circuit docking circuit, a power supply circuit, a short-circuit fault detection circuit, a short-circuit fault locking and alarm circuit, a channel fault alarm circuit, and an adjustable voltage plug. The device can completely collect 6-channel voltage signals at the same time. By inserting the adjustable voltage plug into the middle screw hole of the voltage terminal, the adjustable voltage plug adopts an umbrella-bone type split piece combination. Among them, the short-circuit fault detection circuit and the short-circuit fault locking and alarm circuit isolate the system through the over-current signal in the detection circuit. When a short circuit occurs, the over-current automatically controls the short-circuit over-current protection contact of the secondary circuit docking circuit to disconnect through the electronic switch, isolating the connection between the fault point and the system. The response speed can reach the millisecond level. At the same time, the fuse BX in the circuit is used as a backup or to fuse and disconnect the circuit under large current, which can meet the requirement of continuous power operation of the equipment, reduce the number of equipment outages, and at the same time greatly reduce the safety risks caused by accidental touch by operating personnel or short circuit in the access circuit during the operation process.

Description

Technical Field

[0001] The present invention relates to the technical field of safety protection for voltage terminal operations in power systems, and particularly to a portable voltage terminal monitoring and acquisition auxiliary device. Background Art

[0002] In a power system, when a switch of an electrical operating device trips, it is impossible to objectively find the cause of the trip. Most technicians monitor the current, voltage, switch closing position, switch opening position, switch closing command, and switch tripping command by installing a portable fault recorder. By analyzing the waveform data before and after the trip, the cause of the fault is judged. Most of the terminals for voltage, switch closing position, switch opening position, switch closing command, and switch tripping command use ordinary voltage terminals. Unlike current test terminals with fixed banana jacks, banana plugs can be directly used for docking. Therefore, it is necessary to crimp the monitoring secondary cable and the original cable in a terminal hole, or temporarily install a spare voltage terminal. Whatever solution is used, there are certain safety risks; during voltage monitoring, grounding short circuits of the monitoring cable often occur due to human or equipment reasons, directly tripping the upper-level switch. In severe cases, the thermal control card or the portable recorder channel is burned, resulting in the shutdown of multiple devices; for occasional defects in important equipment with a voltage of 6 kV or above, after monitoring with a portable recorder for a period of time and the defects no longer occur, the portable recorder needs to be removed. At this time, the device switch needs to be disconnected and the operating system needs to be exited before it can be removed. The withdrawal of important equipment affects safe production and increases the workload of operating personnel, presenting certain operation risks. Summary of the Invention

[0003] The purpose of the present invention is to provide a portable voltage terminal monitoring and acquisition auxiliary device, which can solve the problem of installing a temporary monitoring and acquisition device on a voltage terminal in operation in related technologies. At the same time, the device ensures that after a short circuit, the connection between the device and the operating circuit is disconnected within milliseconds through an overcurrent protection circuit detected by an internal small current fuse tube and an electronic switch.

[0004] The technical solution of the present invention is a portable voltage terminal monitoring and acquisition auxiliary device, which is characterized in that it includes a first part of a 6-way secondary circuit docking circuit, a second part of a power supply circuit, a third part of a short-circuit fault detection circuit, a fourth part of a short-circuit fault locking and alarm circuit, a fifth part of a channel fault detection and alarm circuit, and a sixth part of an adjustable voltage connection plug.

[0005] The six-channel secondary circuit docking circuit includes: input terminals for six-channel voltage acquisition, transfer output terminals for six-channel voltage acquisition, six small-current fuses, and six channel control switches. The six-channel secondary circuit docking circuits are all the same. The connection method is as follows: the input terminals of the voltage acquisition for each channel pass through the through-hole current transformers for each channel and are connected to terminal 2 of each J3-1 contact. Terminal 4 of each J3-1 contact is connected to terminal 1 of each small-current fuse. Terminal 2 of the small-current fuse is connected to terminal 1 of each control switch. Terminal 2 of the control switch is connected to the transfer output terminal of the voltage acquisition for each channel.

[0006] The connection relationship of each part is as follows: After the through-hole current transformer in the secondary circuit docking circuit collects the current, it is connected to the input end of the short-circuit fault detection circuit through terminals S1 and S2 of the short-circuit fault detection circuit. The output end OUT1 of the short-circuit fault detection circuit is connected to the input end IN1 of the short-circuit fault blocking alarm circuit. The power supply circuit collects the 220V AC mains power, transforms it, and outputs VCC. This VCC is respectively connected to the drive electronic components in the short-circuit fault detection circuit, the short-circuit fault blocking alarm circuit, and the channel fault detection alarm circuit.

[0007] Further, the adjustable voltage wiring plug is composed of an expansion component, a moving component, an umbrella-bone split piece, a spring baffle support rod, a first wire connection point, a conductive sheet, a first fixed support, a spring baffle, a collecting wire, a tension spring, an insulating shell, a second fixed support, a first tension adjustment knob, a first safety plug, a third fixed support, a screw thread, a hollow screw, a wire output point, an insulating wire, a banana plug, a second wire connection point, a second safety plug, a fourth fixed support, a fifth fixed support, a second tension adjustment knob, a sixth fixed support, a third safety plug, and a fourth safety plug. Among them, the moving component is fixed inside the expansion component. The expansion component is connected to the front end of the spring baffle support rod. The rear end of the spring baffle support rod is connected to the spring baffle. The front end of the conductive sheet is connected to eight umbrella-bone split pieces, and the rear end of the conductive sheet is connected to the first fixed support. The front ends of the collecting wires are respectively connected to the first wire connection point and the second wire connection point. The rear end of the collecting wire is connected to the wire output point. The wire output point is connected to the banana plug through an insulating wire. The first tension adjustment knob is arranged between the second fixed support and the third fixed support. The first safety plug and the second safety plug are arranged on the upper and lower sides of the first tension adjustment knob. The second tension adjustment knob is arranged between the fifth fixed support and the sixth fixed support. The third safety plug and the fourth safety plug are arranged on the upper and lower sides of the second tension adjustment knob. The middle of the insulating shell is fixed with a hollow screw, and a screw thread is provided on the hollow screw. There is a hollow part between the fourth fixed support and the fifth fixed support.

[0008] Further, adjust the position of the first tightening adjustment knob (13) of the adjustable voltage plug A to be close to the head of the adjustable voltage plug, and adjust the position of the second tightening adjustment knob (26) of the adjustable voltage plug B to be far from the head of the adjustable voltage plug. The adjustable voltage plugs A and B are arranged in parallel at the first tightening adjustment knob (13) and the second tightening adjustment knob (26), and the adjustable voltage plugs A and B are used alternately.

[0009] Further, the middle part of the adjustable voltage plug is hollow and internally provided with a tension spring, and the tension spring always maintains an extended state.

[0010] Further, the tension spring and the spring baffle are both installed inside the insulating housing. The front end of the tension spring is connected to the spring baffle, and the rear end of the tension spring is connected to the second fixed support.

[0011] The beneficial effects of the present invention at least include:

[0012] 1. The present invention can completely collect 6 voltage quantities at the same time, that is, it can monitor 6 groups of signal quantities at the same time. The 6 groups of acquisition channels can be independently controlled by switches, which solves the problem of selecting the status quantity monitoring signal, can switch the channels to be monitored at any time, and does not need to disconnect and reconnect the wires, improving work efficiency and reducing work risks.

[0013] 2. The adjustable voltage plugs A and B of the present invention can effectively prevent the mutual influence when docking on two juxtaposed voltage terminals. The adjustable voltage plug adopts a combination of umbrella rib split pieces. When tightening the first tightening adjustment knob and the second tightening adjustment knob, the stretching and moving component can be used to drive the expansion component to cause the umbrella rib split pieces to spread, effectively fixing the adjustable voltage plug in the jack of the voltage terminal, solving the problem that the voltage terminal cannot be temporarily wired except for the wiring port at present, effectively solving the problem of collecting voltage quantities or data through the adjustable voltage plug on the voltage terminal during operation, reducing the number of equipment outages, greatly reducing the risks existing in the operation process, and ensuring the safety of equipment and personnel.

[0014] 3. After the adjustment of the first tightening adjustment knob and the second tightening adjustment knob of the adjustable voltage plug is completed, it can be locked by the first safety pin and the second safety pin to prevent loosening after vibration.

[0015] 4. After the normally open node delay closing contact of the time delay relay J1 of the present invention is connected in series with the normally open contact of the 1-channel switch KG, and then connected in series with the normally closed contact of the intermediate relay J2, the intermediate relay J4 is started. The relay J4 is self-held through its own normally open contact and can return after being reset by the reset button FG. A 1-channel fault indicator is connected after the J4 relay. This solves the problems that the internal wiring of the device is loosely connected, the fuse is blown, the switch fails, etc., which cannot be detected in time, resulting in incorrect oscillogram data and affecting waveform analysis. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a front view of a portable voltage terminal monitoring and acquisition auxiliary device;

[0018] Figure 2 It is a top view of a portable voltage terminal monitoring and acquisition auxiliary device;

[0019] Figure 3 It is a schematic structural diagram of an adjustable voltage connection plug;

[0020] Figure 4 It is an enlarged rear-end view of plug A;

[0021] Figure 5 It is an enlarged rear-end view of plug B;

[0022] Figure 6 For Figure 3 Partial enlarged view of;

[0023] Figure 7 It is a circuit diagram for the docking of the secondary circuit;

[0024] Figure 8 It is a power supply circuit diagram;

[0025] Figure 9 It is a circuit diagram for short-circuit fault detection;

[0026] Figure 10 It is a circuit diagram for short-circuit fault blocking alarm;

[0027] Figure 11 It is a circuit diagram for channel fault detection and alarm;

[0028] Explanation of reference numerals:

[0029] Expansion component 1, moving component 2, umbrella bone split piece 3, spring baffle support rod 4, first wire connection point 5, conductive piece 6, first fixed support 7, spring baffle 8, collecting wire 9, tension spring 10, insulating housing 11, second fixed support 12, first tension adjustment knob 13, first safety bolt 14, third fixed support 15, screw thread 16, hollow screw 17, wire output point 18, insulating wire 19, banana plug 20, second wire connection point 21, second safety bolt 22, fourth fixed support 23, hollow part 24, fifth fixed support 25, second tension adjustment knob 26, sixth fixed support 27, third safety bolt 28, fourth safety bolt 29. Detailed implementation

[0030] To make the objectives, technical solutions and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in detail with reference to the accompanying drawings.

[0031] As Figure 1 shown, on the front panel, there are provided indicators F1 (device power supply), F2 (fault of circuit 1), F3 (fault of circuit 2), F4 (fault of circuit 3), F5 (fault of circuit 4), F6 (fault of circuit 5), F7 (fault of circuit 6), G2 (short circuit of circuit 1), G3 (short circuit of circuit 2), G4 (short circuit of circuit 3), G5 (short circuit of circuit 4), G6 (short circuit of circuit 5), G7 (short circuit of circuit 6). Among them, when F1 (device power supply) is lit, it is green and constantly on, and when the rest of the indicators are lit, they are red and constantly on.

[0032] On the front panel, there is provided G1 (reset button) for returning the self - holding indicators F2 (fault of circuit 1), F3 (fault of circuit 2), F4 (fault of circuit 3), F5 (fault of circuit 4), F6 (fault of circuit 5), F7 (fault of circuit 6), G2 (short circuit of circuit 1), G3 (short circuit of circuit 2), G4 (short circuit of circuit 3), G5 (short circuit of circuit 4), G6 (short circuit of circuit 5), G7 (short circuit of circuit 6).

[0033] On the front panel, there are provided a device power switch, power connection terminals and grounding terminals.

[0034] As Figure 2As shown, the upper panel of the device consists of 4 parts. The first part is the input terminals of the 6-way voltage collection quantity, namely A1 (Ua1, Un1), A2 (Ub1, Un1), A3 (Uc1, Un1), A4 (U11, Un1), A5 (U12, Un1), A6 (U13, Un1); the second part is the transfer output terminals of the 6-way voltage collection quantity, namely B1 (Ua2, Un2), B2 (Ub2, Un2), B3 (Uc2, Un2), B 4 (U21, Un2), B5 (U22, Un2), B6 (U23, Un2); the third part is 6-way low-current fuses, namely C1 (BX1), C2 (BX3), C3 (BX3), C4 (BX4), C5 (BX5), C6 (BX6); the fourth part is the control switch of 6 channels, respectively D1 (KG1), D2 (KG2), D3 (KG3), D4 (KG4), D5 (KG5), D6 (KG6).

[0035] 1. Brief description of overall structural connection

[0036] The present invention provides a portable voltage terminal monitoring and acquisition auxiliary device, the structure of which is divided into six parts:

[0037] The first part is the 6-way secondary circuit docking circuit, the second part is the device power circuit, the third part is the short-circuit fault detection circuit, the fourth part is the short-circuit fault lockout alarm circuit, the fifth part is the channel fault detection alarm circuit, and the sixth part is the adjustable voltage wiring plug;

[0038] The connection method of the 6-way secondary circuit is as follows:

[0039] A1 (Ua1, Un1) of group A passes through the through-core current transformer CT1 and is connected to terminal 2 of contact J3-1 of circuit 1. Terminal 4 of J3-1 is connected to terminal 1 of fuse BX1. Terminal 2 of fuse BX1 is connected to terminal 1 of control switch KG1. Terminal 2 of control switch KG1 is connected to B1 (Ua2, Un2).

[0040] A2 (Ub1, Un1) of group A passes through the through-core current transformer CT2 and is connected to terminal 2 of J3-1 contact of circuit 2. Terminal 4 of J3-1 is connected to terminal 1 of fuse BX2. Terminal 2 of fuse BX2 is connected to terminal 1 of control switch KG2. Terminal 2 of control switch KG2 is connected to B2 (Ub2, Un2).

[0041] A3 (Uc1, Un1) of Group A passes through the through-core current transformer CT3 and is connected to Terminal 2 of the contact J3-1 of Circuit 3. Terminal 4 of J3-1 is connected to Terminal 1 of fuse BX3. Terminal 2 of fuse BX3 is connected to Terminal 1 of control switch KG3. Terminal 2 of control switch KG3 is connected to B3 (Uc2, Un2).

[0042] A4 (U11, Un1) of Group A passes through the through-core current transformer CT4 and is connected to Terminal 2 of the contact J3-1 of Circuit 4. Terminal 4 of J3-1 is connected to Terminal 1 of fuse BX4. Terminal 2 of fuse BX4 is connected to Terminal 1 of control switch KG4. Terminal 2 of control switch KG4 is connected to B4 (U12, Un2).

[0043] A5 (U21, Un1) of Group A passes through the through-core current transformer CT5 and is connected to Terminal 2 of the contact J3-1 of Circuit 5. Terminal 4 of J3-1 is connected to Terminal 1 of fuse BX5. Terminal 2 of fuse BX5 is connected to Terminal 1 of control switch KG5. Terminal 2 of control switch KG5 is connected to B5 (U22, Un2).

[0044] A6 (U31, Un1) of Group A passes through the through-core current transformer CT6 and is connected to Terminal 2 of the contact J3-1 of Circuit 6. Terminal 4 of J3-1 is connected to Terminal 1 of fuse BX6. Terminal 2 of fuse BX6 is connected to Terminal 1 of control switch KG6. Terminal 2 of control switch KG6 is connected to B6 (U32, Un2).

[0045] The connection relationship of each part is as follows: After CT1 in the first part collects the current, it is connected to the input end of the third part through Terminals S1 and S2. The output end OUT1 of the third part is connected to the input end IN1 of the fourth part. The normally closed auxiliary contact J3-1 of the J3 relay in the fourth part serves as a protection disconnection point for the main circuit of the first part. The second part collects the 220V AC mains power supply, transforms it, and outputs VCC. This positive power supply VCC is respectively connected to the circuits of the third part, the fourth part, and the fifth part to drive electronic components.

[0046] II. Detailed Explanation of the Structural Connections of Each Part

[0047] As Figure 7 shown, the first part is the secondary circuit docking circuit. The secondary circuit docking circuit includes Figure 2Among the four parts, the first part is the input terminals for six-channel voltage acquisition quantities, namely A1 (Ua1, Un1), A2 (Ub1, Un1), A3 (Uc1, Un1), A4 (U11, Un1), A5 (U12, Un1), A6 (U13, Un1). The second part is the transfer output terminals for six-channel voltage acquisition quantities, namely B1 (Ua2, Un2), B2 (Ub2, Un2), B3 (Uc2, Un2), B4 (U21, Un2), B5 (U22, Un2), B6 (U23, Un2). The third part is six-channel small current fuses, namely C1 (BX1), C2 (BX3), C3 (BX3), C4 (BX4), C5 (BX5), C6 (BX6). The fourth part is the control switches for six channels, namely D1 (KG1), D2 (KG2), D3 (KG3), D4 (KG4), D5 (KG5), D6 (KG6).

[0048] Among them, A1, B1, C1, D1 are for one channel. Similarly, A2, B2, C2, D2; A3, B3, C3, D3; A4, B4, C4, D4; A5, B5, C5, D5; A6, B6, C6, D6 are each for one channel, totaling six acquisition circuits. The six acquisition circuits are all the same. Now, take the first acquisition circuit as an example for description, and the same applies hereinafter.

[0049] As Figure 7 shown, after the voltage enters the portable voltage terminal monitoring and acquisition auxiliary device through the A1 (Ua1, Un1) terminal, in the main circuit of the first part, Ua1 passes through the through-core current transformer CT1 and then connects to the 2 terminal of J3-1. The 4 terminal of J3-1 connects to the 1 terminal of the small current fuse BX1. The 2 terminal of the small current fuse BX1 connects to the 1 terminal of the control switch KG1 (including a pair of normally open contacts and a pair of normally closed contacts). The Ua2 terminal of the control switch KG1 finally passes through the B1 (Ua2, Un2) terminal for transfer and sending out.

[0050] Among them, a relay J1 is connected in parallel between J3-1 (2, 4) and A1 (Ua1, Un1). The relay J1 has a pair of delay-on normally open contacts and a pair of delay-off normally closed contacts. A relay J2 is connected in parallel between the control switch KG1 and the B1 (Ua2, Un2) terminal. The relay J2 has a pair of normally open contacts and a pair of normally closed contacts; A through-core current transformer is installed between the J1 relay and the input terminal Ua1, and the outgoing lines are the same-name terminal S1 and the non-same-name terminal S2.

[0051] Among them, the secondary circuit docking circuit serves as a transfer circuit. If a short circuit occurs, it passes through Figure 11The J3 relay controls the J3-1 contact to quickly disconnect the transfer circuit of the device, ensuring the normal operation of the original system. The control of the J3 relay is achieved through an electronic switch, and the response speed can reach the millisecond level. At the same time, the fuse BX1 in the circuit is used as a backup or to fuse and disconnect the circuit under large current conditions.

[0052] Among them, the normally open contact with delayed closing of the J1 relay, the normally open contact of the control switch KG1, and the normally closed contact of the J2 relay are connected in series, which can effectively monitor whether a fault occurs inside the portable voltage terminal monitoring and acquisition auxiliary device. If a fault occurs, it can be Figure 1 indicated by the red indicator light F2 (1-way fault) in the middle being lit for alarm.

[0053] As Figure 8 shown, the second part is the device power supply circuit, which includes Figure 1 E1 (L), E2 (N), E3 (PE1), E4 (power switch), F1 (device power supply) operation indicator light, input terminal L, input terminal N, fuse FU1, resistor R1, resistor R2, resistor R3, resistor R4, capacitor C1, capacitor C2, capacitor C3, diode D1, inductor L1, light-emitting diode D2, mutual inductance module L2, and power supply module AC-DC in the middle. It collects 220V alternating current and outputs direct current VCC. The power supply VCC is applied to the circuits of the third part, fourth part, and fifth part.

[0054] Among them, the first input terminal L is connected to the Figure 1 E1 (L) terminal in the middle, the first input terminal N is connected to the Figure 1 E2 (N) terminal in the middle. The circuit fuse FU1 can protect each component on the circuit. Resistor R1 is an adjustable resistor, and resistors R2, R3, and R4 are all varistors, which can protect each component on the circuit when surges accumulate in the circuit. Capacitors C1, C2, and C3 are all filter capacitors, which also play a role in protecting the safety of the circuit. The specifications of resistors R2, R3, R4, capacitors C1, C2, and C3 are determined by the voltage magnitude between input terminal L and input terminal N, as long as each electrical component will not be damaged due to excessive voltage during use. The present invention does not make specific limitations on this. The light-emitting diode D2 serves as the Figure 1 F1 (device power supply) indicator light in the middle.

[0055] As Figure 9As shown in the figure, the third part of the short - circuit fault detection circuit is composed of input terminal S1, input terminal S2, current sensor L3, diode D3, diode D4, diode D5, diode D6, diode D7, diode D8, resistor R5, resistor R6, slide - wire resistor R7, resistor R8, resistor R9, resistor R10, resistor R11, resistor R12, resistor R13, capacitor C4, capacitor C5, capacitor C6, comparator U1, and comparator U2. The current amount at the input end is collected through the through - hole current transformer CT1 to judge whether there is over - current. If over - current occurs, it is output to the OUT1 terminal, and the output terminal OUT1 is connected to the IN1 terminal of the fourth part.

[0056] A protection circuit for over - current detection using a current sensor. The primary of the current sensor (L3) is connected in series in the collector circuit. The over - current signal induced in the secondary is sent to the non - inverting input terminal of comparator U1 after rectification and compared with the reference voltage at the inverting terminal. The output of U1 is sent to comparator U2 with positive feedback and then output. When there is no over - current, U2 outputs a low level. When over - current occurs, U2 outputs a high level. Resistor R7 adjusts the over - current action threshold of the comparator.

[0057] As Figure 10 shown in the figure, the fourth part of the short - circuit fault blocking and alarm circuit is composed of input terminal IN1, diode D9, diode D10, diode D11, diode D12, light - emitting diode D13, triode D14, triode D15, light - emitting diode D16, resistor R14, resistor R15, resistor R16, resistor R17, intermediate relay J3, and reset button. After driving the relay J3 through internal electronic components, it is output to the main - circuit disconnection point J3 - 1 of the first part, playing the role of timely disconnecting the corresponding channel circuit after a short - circuit occurs.

[0058] It should be noted that resistors R14, R15, R16, and R17 are all varistors. The specifications of each resistor are determined by the voltage between the input terminal VCC and the input terminal V0. As long as each electrical component will not be damaged due to too high voltage during use, the present invention does not make specific limitations on this.

[0059] Among them, the light - emitting diode D16 is used as Figure 1 the indicator light of G2 (1 - path short - circuit) in the figure. A set of normally - open contacts J3 - 2 of the relay J3 is connected in parallel between the collector and emitter of the triode D13. When the J3 relay is powered on, it prevents the return of the fault. When the J3 relay loses power and returns, the light - emitting diode D16 goes out. A self - holding circuit can be formed through the normally - open contacts J3 - 2 of the relay J3. Only after the technician confirms the alarm and manually presses Figure 1After pressing G1 (reset button) in the device, the normally closed contact in series in front of the light-emitting diode D16 is disconnected, and then the relay J3 can lose power and return, and at the same time, the light-emitting diode D16 goes out.

[0060] As Figure 11 shown, the fifth part, the channel fault detection and alarm circuit, consists of the delayed closing normally open contact (1, 3) of the J1 relay, the normally open contact (1, 2) of the control switch KG1, the normally closed contact (2, 4) of the J2 relay, the light-emitting diode D17, the normally open contact (1, 3) of the intermediate relay J4, and the reset button. It can effectively monitor whether a fault occurs inside the portable voltage terminal monitoring and acquisition auxiliary device. If a fault occurs, the Figure 1 red indicator light F2 (1-channel fault) in the device lights up for alarm.

[0061] Among them, the normally open contact J1-1 of the J1 relay is a delayed closing contact, the normally open contact KG1-1 of the control switch KG1 is a non-delayed contact, the normally open contact J2-1 of the J2 relay is a non-delayed contact, and the light-emitting diode D17 is the Figure 1 F2 (1-channel fault) indicator light of the device.

[0062] When voltage is connected to the input end of the device, Figure 11 the J1 relay in the device controls the delayed closing of the J1-1 contact. After closing the control switch KG1, the normally open auxiliary contact KG1-1 of the switch closes. At this time, Figure 11 the J2 relay in the device controls the disconnection of the normally closed contact J2-1, and the light-emitting diode D17 does not light up. If the voltage is disconnected due to reasons such as node soldering joints in the circuit or fuse blowing, Figure 11 the J2 relay in the device is not powered, and the normally closed contact does not change its position, and the light-emitting diode D17 can be directly conducted and lit. To prevent the return of the fault, a self-holding circuit with the intermediate relay J4 and its own normally open contact in series with the reset button is set in the circuit. After the technician confirms the alarm, manually press the Figure 1 G1 (reset button) in the device, and then the light-emitting diode D17 can lose power and go out.

[0063] As Figure 3 、 Figure 4 、 Figure 5 、 Figure 6As shown in the figure, the sixth part is the adjustable voltage wiring plug part, which is composed of an expansion component 1, a moving component 2, an umbrella bone type split piece 3, a spring baffle support rod 4, a first wire connection point 5, a conductive piece 6, a first fixed support 7, a spring baffle 8, a collecting wire 9, a tension spring 10, an insulating housing 11, a second fixed support 12, a first tightening adjustment knob 13, a first safety pin 14, a third fixed support 15, a screw thread 16, a hollow screw 17, a wire output point 18, an insulating wire 19, a banana plug 20, a second wire connection point 21, a second safety pin 22, a fourth fixed support 23, a fifth fixed support 25, a second tightening adjustment knob 26 and a sixth fixed support 27. It is connected to the screw hole in the middle of the voltage terminal, and the collected analog quantity is respectively connected to the channels of groups A, B, C, D, E, and F through the insulating wire 19 and the banana plug 20.

[0064] The moving component 2 is fixed inside the expansion component 1. The expansion component 1 adopts a conical design and is connected to the front end of the spring baffle support rod 4, and the rear end of the spring baffle support rod 4 is connected to the spring baffle 8.

[0065] The middle of the adjustable voltage plug is hollow, and a tension spring 10 is installed inside. The tension spring always maintains a stretched state, further fixing the adjustable voltage plug in the jack of the voltage terminal, increasing the stability and reliability of the installation.

[0066] The front end of the conductive piece 6 is connected to eight umbrella bone type split pieces 3, and the rear end of the conductive piece 6 is connected to the first fixed support 7; the front end of the collecting wire 9 is respectively connected to the first wire connection point 5 and the second wire connection point 21, the rear end of the collecting wire 9 is connected to the wire output point 18, the wire output point 18 is connected to the banana plug 20 through the insulating wire 19, the front end of the tension spring 10 is connected to the spring baffle 8, and the tension spring 10 and the spring baffle 8 are both installed inside the insulating housing 11. The rear end of the tension spring 10 is connected to the second fixed support 12.

[0067] The first tightening adjustment knob 13 is arranged between the second fixed support 12 and the third fixed support 15, and the first safety pin 14 and the second safety pin 22 are arranged on the upper and lower sides of the first tightening adjustment knob 13.

[0068] The second tightening adjustment knob 26 is arranged between the fifth fixed support 25 and the sixth fixed support 27, and the third safety pin 28 and the fourth safety pin 29 are arranged on the upper and lower sides of the second tightening adjustment knob 26.

[0069] A hollow screw 17 is fixed in the middle of the insulating housing 11, and a screw thread 16 is provided on the hollow screw 17. There is a hollow part 24 between the fourth fixed support 23 and the fifth fixed support 25.

[0070] The main difference between the adjustable voltage plugs A and B lies in the positions of the first tightening adjustment knob 13 and the second tightening adjustment knob 26. The position of the first tightening adjustment knob 13 of the adjustable voltage plug A is close to the head of the adjustable voltage plug, and the position of the second tightening adjustment knob 26 of the adjustable voltage plug B is far from the head of the adjustable voltage plug. The adjustable voltage plugs A and B are arranged in parallel at the first tightening adjustment knob 13 and the second tightening adjustment knob 26, effectively preventing mutual influence when docking on two juxtaposed voltage terminals. Generally, the adjustable voltage plugs A and B are used interchangeably.

[0071] Among them, the expansion component 1, the moving component 2, the umbrella bone type splitting piece 3, the conductive sheet 6, and the front end of the banana plug 20 are made of conductive materials, and the middle hollow screw 17, the first tightening adjustment knob 13, the second tightening adjustment knob 26, the insulating wire 19, and the rear end of the banana plug 20 are all made of insulating materials to ensure the safety of personnel during the operation.

[0072] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A portable voltage terminal monitoring and acquisition auxiliary device, characterized in that: It includes the first part, 6-way secondary circuit docking circuit, the second part, power supply circuit, the third part, short circuit fault detection circuit, the fourth part, short circuit fault blocking alarm circuit, the fifth part, channel fault detection alarm circuit and the sixth part, adjustable voltage connection plug; The 6-way secondary circuit docking circuit includes: 6-way voltage acquisition input terminals, 6-way voltage acquisition transfer output terminals, 6-way low-current fuses, and 6-way channel control switches. The 6-way secondary circuit docking circuit is the same; the connection method is: the voltage acquisition input terminal of each channel is connected to the 2nd terminal of each J3-1 contact through the through-core current transformer of each channel, the 4th terminal of each J3-1 contact is connected to the 1st terminal of each low-current fuse, the 2nd terminal of the low-current fuse is connected to the 1st terminal of each control switch, and the 2nd terminal of the control switch is connected to the transfer output terminal of each voltage acquisition channel; The connection relationship between the various parts is as follows: the through-hole current transformer in the secondary circuit docking circuit collects current and then connects it to the input end of the short-circuit fault detection circuit through the S1 and S2 terminals of the short-circuit fault detection circuit. The output end OUT1 of the short-circuit fault detection circuit is connected to the input end IN1 of the short-circuit fault lockout alarm circuit. The power supply circuit collects the 220V AC power supply from the mains and outputs VCC after conversion. The VCC is respectively connected to the circuits of the short-circuit fault detection circuit, the short-circuit fault lockout alarm circuit, and the channel fault detection alarm circuit to drive the electronic components. The adjustable voltage connection plug is composed of an expansion component (1), a moving component (2), an umbrella-shaped split piece (3), a spring baffle support rod (4), a first wire connection point (5), a conductive piece (6), a first fixed support (7), a spring baffle (8), a collection line (9), a tension spring (10), an insulating shell (11), a second fixed support (12), a first tension adjustment knob (13), a first safety pin (14), a third fixed support (15), a screw wire (16), a hollow screw (17), a wire output point (18), an insulated wire (19), a banana plug (20), a second wire connection point (21), a second safety pin (22), a fourth fixed support (23), a fifth fixed support (25), a second tension adjustment knob (26), a sixth fixed support (27), a third safety pin (28), and a fourth safety pin (29); The moving component (2) is fixed inside the expansion component (1), the expansion component (1) adopts a conical design, the expansion component (1) is connected to the front end of the spring baffle support rod (4), and the rear end of the spring baffle support rod (4) is connected to the spring baffle (8); the front end of the conductive sheet (6) is connected to the eight umbrella-shaped split sheets (3), and the rear end of the conductive sheet (6) is connected to the first fixed support member (7); the front end of the collection line (9) is respectively connected to the first wire connection point (5) and the second wire connection point (21), the rear end of the collection line (9) is connected to the wire output point (18), and the wire output point (18) is connected to the banana plug (20) through the insulated wire (19); the first tension adjustment knob (1 3) arranged between the second fixed support (12) and the third fixed support (15), with a first safety latch (14) and a second safety latch (22) provided on the upper and lower sides of the first tension adjustment knob (13); the second tension adjustment knob (26) arranged between the fifth fixed support (25) and the sixth fixed support (27), with a third safety latch (28) and a fourth safety latch (29) provided on the upper and lower sides of the second tension adjustment knob (26); a hollow screw (17) is fixed in the middle of the insulating housing (11), and a screw thread (16) is provided on the hollow screw (17); a hollow portion (24) is provided between the fourth fixed support (23) and the fifth fixed support (25); The adjustable voltage plug is hollow in the middle and has a built-in tension spring (10), which is always kept in an extended state. The tension spring (10) and the spring baffle (8) are both installed inside the insulating housing (11), the front end of the tension spring (10) is connected to the spring baffle (8), and the rear end of the tension spring (10) is connected to the second fixed support member (12).

2. A portable voltage terminal monitoring and acquisition auxiliary device according to claim 1, characterized in that: The first tightness adjustment knob (13) of the adjustable voltage plug A is located close to the head of the adjustable voltage plug, and the second tightness adjustment knob (26) of the adjustable voltage plug B is located away from the head of the adjustable voltage plug. The adjustable voltage plugs A and B are arranged in parallel at the first tightness adjustment knob (13) and the second tightness adjustment knob (26), and the adjustable voltage plugs A and B are used alternately.

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