Automatic running-in test device for permanent magnet circuit breaker of switch cabinet

Abstract

Provided is an automatic running-in testing device for a permanent magnet circuit breaker of a switch cabinet. The utility model aims to solve the problem in the prior art that all permanent magnet circuit breakers stop running-in or are mistakenly considered to have met running-in requirements due to the fact that some permanent magnet circuit breakers are abnormal in the running-in process. According to the technical scheme, the device comprises a box body, a control panel and a control circuit, the control circuit comprises an alternating current power supply main switch, a logic control module, more than two permanent magnet control mechanism driving modules, an AC-DC power supply module, an automatic or manual change-over switch, a manual closing button switch, a manual opening button switch and more than two permanent magnet control mechanism opening and closing coil connection interfaces. The control circuit is characterized in that the control circuit further comprises more than two counting relays, control output normally-closed contacts of the counting relays are connected to the power input end of the permanent magnet control mechanism driving module in series, and the signal input ends of the counting relays are connected with on-off state sampling normally-closed contacts.

Description

Technical Field

[0001] The utility model relates to a testing device for a switchgear manufacturing factory of power equipment, in particular to an automatic running-in testing device for a permanent magnet circuit breaker of a switchgear. Background Technique

[0002] For a switchgear manufacturing factory of power equipment, as an important electrical component of the switchgear, a large number of circuit breakers are used, and the action reliability of the circuit breaker directly affects the effectiveness of the control and protection of the switchgear in the power grid power supply. Therefore, it is necessary to conduct a running-in test on the circuit breaker before the switchgear leaves the factory. Currently, the vacuum circuit breakers with spring operating mechanisms are widely used in switchgear circuit breakers. For the running-in test of this type of circuit breaker, the applicant has previously applied for a patent for a running-in test power vehicle for a switchgear circuit breaker with the Chinese patent number CN115877201B. Due to the large number of parts, high processing accuracy requirements, high manufacturing costs, low working reliability and short service life of the vacuum circuit breaker with a spring operating mechanism, a new generation of permanent magnet operating mechanism vacuum circuit breakers, namely permanent magnet circuit breakers, have emerged. The permanent magnet circuit breaker uses permanent magnets to achieve closing and opening holding, and at the same time uses closing and opening coils to drive the moving contact to achieve closing and opening actions respectively, with the advantages of fewer parts, lower processing accuracy requirements, reduced manufacturing costs, improved working reliability and longer service life. The automatic running-in test device for the permanent magnet circuit breaker of this switchgear is an automatic running-in test device that drives the moving contact to perform closing and opening actions through the closing and opening coils of the permanent magnet circuit breaker. The closing and opening coil is a coil that serves as both an opening coil and a closing coil, and the role conversion between the opening coil and the closing coil is achieved by changing the voltage polarity at both ends of the closing and opening coil. Currently, when a switchgear manufacturing factory conducts a running-in test on a permanent magnet circuit breaker, it is basically carried out manually. It is necessary to manually and tediously wire the circuit breaker for the running-in test and complete it through manual control. When the number of circuit breakers to be tested is large, the labor intensity of the tedious wiring and manual control is too high, the work efficiency is low, and misconnection is likely to occur.

[0003] The Chinese patent application No. CN117148137 previously filed by the present applicant discloses an automatic running-in test device for a permanent magnet circuit breaker of a switch cabinet. The structure includes a box body and an operation panel arranged on the box body. The feature is that an AC power main switch, a display screen of a logic control module, a counting reset push-button switch, an automatic or manual changeover switch, a manual closing push-button switch, a manual opening push-button switch, and more than two connection interfaces for closing and opening coils of a permanent magnet operating mechanism are arranged on the operation panel. A control circuit is installed on the box body; the control circuit includes an AC power main switch, a logic control module, more than two driving modules for a permanent magnet operating mechanism, an AC-DC power module, a normally closed contact for sampling the closing and opening state, a counting reset push-button switch, an automatic or manual changeover switch, a manual closing push-button switch, a manual opening push-button switch, and more than two connection interfaces for closing and opening coils of a permanent magnet operating mechanism; wherein the input end of the AC power main switch is connected to an AC power supply, and the output end of the AC power main switch is connected to the power input end of the logic control module; one end of each of the normally closed contact for sampling the closing and opening state, the counting reset push-button switch, and the automatic or manual changeover switch is respectively connected to the live wire of the output end of the AC power main switch, and the other end of each of them is respectively connected to the first input end, the second input end, and the third input end of the logic control module; the first output end of the logic control module is divided into several paths, one of which is connected to the manual closing push-button switch, and each of the other paths is respectively connected to the closing signal input end of a driving module for a permanent magnet operating mechanism; the second output end of the logic control module is divided into several paths, one of which is connected to the manual opening push-button switch, and each of the other paths is respectively connected to the opening signal input end of a driving module for a permanent magnet operating mechanism; the control output end of each driving module for a permanent magnet operating mechanism is respectively connected to a connection interface for closing and opening coils of a permanent magnet operating mechanism; the power input end of the AC-DC power module is connected to the output end of the AC power main switch, and the power output end of the AC-DC power module is divided into several paths, and each path is respectively connected to the DC power input end of a driving module for a permanent magnet operating mechanism. However, this solution has the following disadvantages: When more than two permanent magnet circuit breakers of switch cabinets are simultaneously subjected to automatic running-in tests on one automatic running-in test device, the normally closed contact of the relay reflecting the closing and opening state on the closing and opening circuit of one of the permanent magnet circuit breakers of the switch cabinet is selected as the normally closed contact for sampling the closing and opening state of the logic control module to input a counting signal to the logic control module. When the number of closing and opening operations of this permanent magnet circuit breaker of the switch cabinet reaches the set value, the logic control module controls all the permanent magnet circuit breakers of the switch cabinets to stop the running-in work. It is impossible to achieve separate independent counting of closing and opening operations and separate independent control of stopping the running-in for each permanent magnet circuit breaker of the switch cabinet. When an abnormality occurs during the running-in process of the selected permanent magnet circuit breaker of the switch cabinet, all the permanent magnet circuit breakers of the switch cabinets will stop the running-in work. When an abnormality occurs during the running-in process of other permanent magnet circuit breakers of the switch cabinets, their faults cannot be manifested and will be misjudged as having met the set running-in requirements. Summary of the Invention

[0004] In order to overcome the problems existing in the prior art of the applicant, that is, it is impossible to separately perform closing and opening count and separately control the stop of running-in for each permanent magnet circuit breaker in the running-in test, and when an abnormality occurs in an individual permanent magnet circuit breaker in a switch cabinet during running-in, it will cause all permanent magnet circuit breakers to stop running-in work or be misjudged as having passed the set running-in requirements. The purpose of the present utility model is to provide an improved automatic running-in test device for a permanent magnet circuit breaker in a switch cabinet, which can overcome the defects of the prior art.

[0005] The technical solution adopted by the present utility model to solve its technical problems is: an automatic running-in test device for a permanent magnet circuit breaker in a switch cabinet, including a box body and an operation panel arranged on the box body. An AC power supply main switch, a logic control module display screen, an automatic or manual changeover switch, a manual closing push-button switch, a manual opening push-button switch, and more than two connection interfaces for closing and opening coils of a permanent magnet operating mechanism are arranged on the operation panel. A control circuit is arranged on the box body; the control circuit includes an AC power supply main switch, a logic control module, more than two permanent magnet operating mechanism driving modules, an AC-DC power supply module, an automatic or manual changeover switch, a manual closing push-button switch, a manual opening push-button switch, and more than two connection interfaces for closing and opening coils of a permanent magnet operating mechanism; wherein the input end of the AC power supply main switch is connected to an AC power supply, and the output end of the AC power supply main switch is connected to the power input end of the logic control module; one end of the automatic or manual changeover switch is connected to the live wire of the output end of the AC power supply main switch, and the other end is connected to an input end of the logic control module; the first output end of the logic control module is divided into several paths, one of which is connected to the manual closing push-button switch, and each of the other paths is respectively connected to the closing signal input end of a permanent magnet operating mechanism driving module; the second output end of the logic control module is divided into several paths, one of which is connected to the manual opening push-button switch, and each of the other paths is respectively connected to the opening signal input end of a permanent magnet operating mechanism driving module; the control output end of each permanent magnet operating mechanism driving module is respectively connected to a connection interface for closing and opening coils of a permanent magnet operating mechanism; the power input end of the AC-DC power supply module is connected to the output end of the AC power supply main switch, and the power output end of the AC-DC power supply module is divided into several paths, and each path is respectively connected to the DC power input end of a permanent magnet operating mechanism driving module; its characteristic is that: the control circuit further includes more than two counting relays, the power supply ends of the counting relays are respectively connected to the output end of the AC power supply main switch, the normally closed contacts of the control outputs of each counting relay are respectively connected in series in the DC power input end circuit of a permanent magnet operating mechanism driving module, and a normally closed contact for sampling the closing and opening state is connected to the signal input end of each counting relay.

[0006] For each path of the power output terminal of the above-mentioned AC-DC power module, it can be respectively connected to the DC power input terminal of one of the permanent magnet control mechanism drive modules through a drive module power rotation switch. The normally closed contact of the control output of the counting relay is connected in series to the DC power input terminal circuit of the permanent magnet control mechanism drive module in front of the drive module power rotation switch.

[0007] The first output terminal and the second output terminal of the above-mentioned logic control module can be relay-type output terminals. The first output terminal has a pair of pins. One of the pins of the first output terminal is divided into several paths. One path is connected to the manual closing button switch, and each of the other paths is respectively connected to the closing signal input terminal of one of the permanent magnet control mechanism drive modules. The second pin of the first output terminal is connected to the common terminal. The second output terminal also has a pair of pins. One of the pins of the second output terminal is divided into several paths. One path is connected to the manual opening button switch, and each of the other paths is respectively connected to the opening signal input terminal of one of the permanent magnet control mechanism drive modules. The second pin of the second output terminal is connected to the common terminal.

[0008] The second pin of the first output terminal of the above-mentioned logic control module and the second pin of the second output terminal can both be connected to the common terminal on the two or more permanent magnet control mechanism drive modules.

[0009] One of the pins of the first output terminal of the above-mentioned logic control module can be connected to one end of the manual closing button switch, and one of the pins of the second output terminal of the logic control module can be connected to one end of the manual opening button switch. The other ends of the manual closing button and the manual opening button switch are all connected to the second pin of the first output terminal of the logic control module, the second pin of the second output terminal of the logic control module, and the common terminal on the two or more permanent magnet control mechanism drive modules.

[0010] The input and output voltages of the above-mentioned AC power main switch can both be AC 220V, the output voltage of the AC-DC power module can be DC 48V, and the output voltage of the permanent magnet control mechanism drive module can be DC 380V.

[0011] The above-mentioned logic control module can adopt a 6ED1052-1FB08-0BA1 type logic control module (Siemens LOGO), a 6ED1052-1MD08-0BA1 type logic control module (Siemens LOGO), or a 1769-IF16C type logic control module (AB Rockwell), etc. When the logic control module is used, a running program is preset.

[0012] The AC-DC power module described in the above technical solution may adopt a DMN500-2448F power module (Saidisheng) or a PUD500-S48N power module (Pinyuan), etc.

[0013] The permanent magnet operating mechanism drive module described in the above technical solution may adopt the ZC-B-JGB2 type permanent magnet operating mechanism drive module produced by the applicant, or a general permanent magnet operating mechanism drive module.

[0014] The counter described in the above technical solution may adopt a JDM1-48 type counting relay (CHINT) or an NJJ7-M type counting relay (CHINT), etc.

[0015] On each of the two or more permanent magnet operating mechanism drive modules described in the above technical solution, an energy storage information acquisition terminal may be respectively provided. The power supply terminals of the energy storage information acquisition terminals are respectively connected to the positive pole of the power output of the AC-DC power module, and the common terminals of the energy storage information acquisition terminals are respectively connected to the negative pole of the power output of the AC-DC power module. An energy storage capacitor full indicator is respectively connected between the common terminal of the energy storage information acquisition terminal and the negative pole of the power output of the AC-DC power module. When the energy storage capacitor is full, a loop is formed between the power supply terminal and the common terminal of the energy storage information acquisition terminal, and the energy storage capacitor full indicator lights up.

[0016] The permanent magnet operating mechanism drive module described in the above technical solution adopts a ZC-B-JGB2 type permanent magnet operating mechanism drive module. The ZC-B-JGB2 type permanent magnet operating mechanism drive module is composed of a DC step-up transformer, an energy storage capacitor, a first field effect transistor, a second field effect transistor, a third field effect transistor, and a fourth field effect transistor, and is provided with a DC power input terminal, a control output terminal, a closing signal input terminal, and a tripping signal input terminal; wherein the power input terminal of the DC step-up transformer is connected to the DC power input terminal; the positive pole of the power output of the DC step-up transformer is divided into two paths, one path is connected to the positive pole of the energy storage capacitor, and the other path is connected in parallel to the drain of the first field effect transistor and the drain of the second field effect transistor; the negative pole of the power output of the DC step-up transformer is divided into two paths, one path is connected to the negative pole of the energy storage capacitor, and the other path is connected in parallel to the source of the third field effect transistor and the source of the fourth field effect transistor; the gate of the first field effect transistor and the gate of the fourth field effect transistor are connected in parallel to the closing signal input terminal, and the gate of the second field effect transistor and the gate of the third field effect transistor are connected in parallel to the tripping signal input terminal; the source of the first field effect transistor and the drain of the third field effect transistor are connected in parallel to one pole of the control output terminal, and the source of the second field effect transistor and the drain of the fourth field effect transistor are connected in parallel to the other pole of the control output terminal.

[0017] The energy storage information acquisition terminal described in the above technical solution may be led out from the DC step-up transformer.

[0018] The beneficial effects of the present utility model are as follows: Since the control circuit further includes two or more counting relays, the power supply terminals of the counting relays are respectively connected to the output terminal of the AC power main switch, and the normally closed control output contacts of each counting relay are respectively connected in series to the DC power input terminal circuit of one of the permanent magnet control mechanism drive modules. The signal input terminal of each counting relay is connected with a normally closed contact for sampling the opening and closing state. By using the normally closed contacts of the relays reflecting the opening and closing states on the opening and closing circuits of each permanent magnet circuit breaker during running-in tests as the normally closed contacts for sampling the opening and closing states of each counting relay, each permanent magnet circuit breaker can independently perform the counting of opening and closing during the automatic running-in test process and independently control its stop of running-in, effectively avoiding the defect in the prior art of the applicant that when an abnormality occurs during the running-in of an individual permanent magnet circuit breaker, all permanent magnet circuit breakers will stop running-in work or be misjudged as having met the set number of running-in times.

[0019] The following further describes the present utility model in conjunction with the accompanying drawings and embodiments. Description of the Drawings

[0020] Figure 1 It is a front schematic view of an embodiment of the present invention.

[0021] Figure 2 It is Figure 1 the back schematic view of

[0022] Figure 3 It is Figure 1 a block schematic diagram of a solution of the control circuit in the embodiment.

[0023] Figure 4 It is Figure 1 a block schematic diagram of another solution of the control circuit in the embodiment.

[0024] Figure 5 It is Figure 4 a circuit principle schematic diagram of

[0025] Figure 6 It is Figure 5 the circuit principle schematic diagram of the ZC-B-JGB2 type permanent magnet control mechanism drive module in

[0026] In the figure: 1. Box body; 2. Control panel; 4. AC power main switch; 5. Display screen of the logic control module; 6. Automatic or manual changeover switch; 7. Manual closing push-button switch; 8. Manual opening push-button switch; 9. Counting relay; 10. Connection interface for the opening and closing coils of the permanent magnet control mechanism; 11. Power indicator light; 12. Indicator light for full charge of the energy storage capacitor; 13. Rotary switch for the power supply of the drive module. Detailed Embodiment

[0027] Reference Figures 1 to 2 , for this permanent magnet circuit breaker automatic running-in test device of switchgear, it includes a box body 1 and a control panel 2 arranged on the box body. An AC power supply main switch 4, a logic control module display screen 5, an automatic or manual changeover switch 6, a manual closing push-button switch 7, a manual opening push-button switch 8, five counting relays 9 and five permanent magnet control mechanism closing and opening coil interfaces 10 are arranged on the control panel 2. A control circuit is arranged on the box body 1; Reference Figure 3 , the control circuit includes an AC power supply main switch, a logic control module, more than two permanent magnet control mechanism driving modules, an AC-DC power supply module, an automatic or manual changeover switch, a manual closing push-button switch, a manual opening push-button switch and more than two permanent magnet control mechanism closing and opening coil interfaces; wherein the input end a of the AC power supply main switch is connected to the AC power supply, and the output end b of the AC power supply main switch is connected to the power input end of the logic control module; one end of the automatic or manual changeover switch is respectively connected to the live wire c of the output end of the AC power supply main switch, and the other end is connected to an input end d of the logic control module; the first output end e of the logic control module is divided into several paths, one of which is connected to the manual closing push-button switch, and each of the other paths is respectively connected to the closing signal input end f of a permanent magnet control mechanism driving module; the second output end g of the logic control module is divided into several paths, one of which is connected to the manual opening push-button switch, and each of the other paths is respectively connected to the opening signal input end h of a permanent magnet control mechanism driving module; the control output end j of each permanent magnet control mechanism driving module is respectively connected to a permanent magnet control mechanism closing and opening coil interface; the power input end k of the AC-DC power supply module is connected to the output end of the AC power supply main switch, and the power output end l of the AC-DC power supply module is divided into several paths, and each path is respectively connected to the DC power input end m of a permanent magnet control mechanism driving module; it is characterized in that: the control circuit further includes more than two counting relays, the power supply ends n of the counting relays are respectively connected to the output end of the AC power supply main switch, the control output normally closed contacts of each counting relay are respectively connected in series on the circuit of the DC power input end m of a permanent magnet control mechanism driving module, and a closing and opening state sampling normally closed contact is connected to the signal input end o of each counting relay.

[0028] In addition, each path of the power output end l of the AC-DC power supply module is respectively connected to the DC power input end m of a permanent magnet control mechanism driving module through a driving module power supply rotary switch, and the control output normally closed contact of the counting relay is connected in series on the circuit of the DC power input end m of the permanent magnet control mechanism driving module in front of the driving module power supply rotary switch.

[0029] Reference Figure 4 , inFigure 3 On the basis of, the first output terminal e' and the second output terminal g' of the logic control module are relay-type output terminals. The first output terminal e' has a pair of pins. Among them, pin 1 of the first output terminal e' is connected according to Figure 3 the connection method of the first output terminal e. Pin 2 of the first output terminal e' is connected to the common terminal; the second output terminal g' also has a pair of pins. Pin 1 of the second output terminal g' is connected according to Figure 3 the connection method of the second output terminal g. Pin 2 of the second output terminal g' is connected to the common terminal.

[0030] Pin 2 of the first output terminal e' and pin 2 of the second output terminal g' are both connected to the common terminal p on the two or more permanent magnet control mechanism drive modules.

[0031] Pin 1 of the first output terminal e' of the logic control module is connected to one end q of the manual closing button switch. Pin 1 of the second output terminal g' of the logic control module is connected to one end r of the manual opening button switch. The other end s of the manual closing button, the other end t of the manual opening button switch, pin 2 of the first output terminal e' of the logic control module, and pin 2 of the second output terminal g' of the logic control module are all connected to the common terminal p on the two or more permanent magnet control mechanism drive modules.

[0032] Refer to Figure 5, the circuit schematic diagram of the control circuit includes an AC power supply main switch K1, a logic control module IC1 of model 6ED1052-1FB08-0BA1, five permanent magnet control mechanism drive modules IC2 of model ZC-B-JGB2, an AC-DC power supply module IC3 of model DMN500-2448F, an automatic or manual transfer switch K2, a manual closing button switch K3, a manual opening button switch K4, and five permanent magnet control mechanism closing and opening coil interfaces X, which can be respectively connected to five permanent magnet circuit breakers for running-in tests at the same time; wherein the input end of the AC power supply main switch K1 is connected to the AC power supply, and the output end of the AC power supply main switch K1 is connected to the power input terminals L and N of the logic control module IC1; one end of the automatic or manual transfer switch K2 is connected to the live wire L of the output end of the AC power supply main switch K1, and the other ends thereof are respectively connected to an input terminal I3 of the logic control module IC1; the pin 1 of the first output terminal Q1 of the logic control module IC1 is divided into six paths, one of which is connected to one end of the manual closing button switch K3, and the other five paths are respectively connected to the closing signal input terminals HZ of the five permanent magnet control mechanism drive modules IC2; the pin 1 of the second output terminal Q2 of the logic control module IC1 is divided into six paths, one of which is connected to one end of the manual opening button switch K4, and the other five paths are respectively connected to the opening signal input terminals FZ of the five permanent magnet control mechanism drive modules IC2; the control output terminals U1 and U2 of the five permanent magnet control mechanism drive modules IC2 are respectively connected to the five permanent magnet control mechanism closing and opening coil interfaces X; the power input terminals L and N of the AC-DC power supply module IC3 are connected to the output end of the AC power supply main switch K1, the positive pole V1+ of the power output of the AC-DC power supply module IC3 is divided into five paths and respectively connected to the positive poles V+ of the DC power inputs of the five permanent magnet control mechanism drive modules IC2, and the negative pole V1- of the power output of the AC-DC power supply module IC3 is divided into five paths and respectively connected to the negative poles V- of the DC power inputs of the five permanent magnet control mechanism drive modules IC2; it is characterized in that: the control circuit further includes five counting relays JC, the power terminals 2 and 7 of the counting relay JC are respectively connected to the output end of the AC power supply main switch K1, the normally closed control output contact J1 of each counting relay JC is respectively connected in series in the positive V+ circuit of the DC power input of a permanent magnet control mechanism drive module IC2, and a normally closed contact J2 for sampling the closing and opening state is connected to each signal input terminals 1 and 3 of the counting relay JC.

[0033] In addition, each path of the positive pole V1+ of the power output of the AC-DC power supply module IC3 is respectively connected to the positive pole V+ of the DC power input of a permanent magnet control mechanism drive module IC2 through a drive module power rotary switch K5, thus Figure 1On the control panel 2 of the box body 1 shown, there are five power rotation switches 13 for the drive modules. The normally closed contact J1 of the control output of the counting relay JC is connected in series to the positive pole V+ circuit of the DC power input of the permanent magnet control mechanism drive module IC2 in front of the drive module power rotation switch K5.

[0034] Between the live wire L and the neutral wire N at the output end of the main AC power switch K1, there is also a power indicator HL1 connected. Therefore Figure 1 On the control panel 2 of the box body 1 shown, there is a power indicator 11.

[0035] The pin 2 of the first output Q1 of the logic control module IC1, the pin 2 of the second output Q2 of the logic control module IC1, the other end of the manual closing push-button switch K3, the other end of the manual opening push-button switch K4, and the common terminal YXCOM pins of the five permanent magnet control mechanism drive modules IC2 are connected to each other.

[0036] Each of the five permanent magnet control mechanism drive modules IC2 is provided with an energy storage information acquisition terminal CN and a YKCOM pin. Its power supply terminal CN pin is connected to the positive pole V1+ pin of the power output of the AC-DC power module IC3, and its common terminal YKCOM pin is connected to the negative pole V1- pin of the power output of the AC-DC power module IC3. Between the common terminal YKCOM pin of the energy storage information acquisition terminal and the negative pole V1- pin of the power output of the AC-DC power module IC3, there is an energy storage capacitor full indicator HL2. When the energy storage capacitor is full, the energy storage information acquisition terminal CN and YKCOM form a loop, and the energy storage capacitor full indicator HL2 lights up. Therefore Figure 1 On the control panel 2 of the box body 1 shown, there are five energy storage capacitor full indicators 12.

[0037] The input and output voltages of the main AC power switch K1 are both AC 220V. The output voltage of the AC-DC power module IC3 is DC 48V. The output voltages of the control outputs U1 and U2 of the permanent magnet control mechanism drive module IC2 are DC 380V.

[0038] Refer to Figure 6The ZC-B-JGB2 type permanent magnet control mechanism drive module IC2 is composed of an HRB24400D type DC boost module IC4, a storage capacitor C1, a first field effect transistor VT1, a second field effect transistor VT2, a third field effect transistor VT3, and a fourth field effect transistor VT4, and is provided with a DC power input terminal V+ and V- pins, a control output terminal U1 and U2 pins, a closing signal input terminal HZ pin, and a tripping signal input terminal FZ pin; wherein the power input terminals VIN+ and VIN- of the DC boost module IC4 are respectively connected to the DC power input terminal V+ and V- pins; the positive pole VOUT+ of the power output terminal of the DC boost module IC4 is divided into two paths, one path is connected to the positive pole of the storage capacitor C1, and the other path is connected in parallel to the drain of the first field effect transistor VT1 and the drain of the second field effect transistor VT2; the negative pole VOUT- of the power output terminal of the DC boost module IC4 is divided into two paths, one path is connected to the negative pole of the storage capacitor C1, and the other path is connected in parallel to the source of the third field effect transistor VT3 and the source of the fourth field effect transistor VT4; the gate of the first field effect transistor VT1 and the gate of the fourth field effect transistor VT4 are connected in parallel to the closing signal input terminal HZ pin, and the gate of the second field effect transistor VT2 and the gate of the third field effect transistor VT4 are connected in parallel to the tripping signal input terminal FZ; the source of the first field effect transistor VT1 and the drain of the third field effect transistor VT3 are connected in parallel to one pole U1 pin of the control output terminal, and the source of the second field effect transistor VT2 and the drain of the fourth field effect transistor VT4 are connected in parallel to the other pole U2 pin of the control output terminal.

[0039] The energy storage information acquisition terminal CN and the YKCOM pin on the permanent magnet control mechanism drive module IC2 are led out from the k1 and k2 pins on the DC boost module IC4. When the storage capacitor C1 is fully charged, the energy storage information acquisition terminal CN and the YKCOM pin form a loop. Figure 5 The energy storage capacitor full indicator light HL2 on it will light up.

[0040] When in use, as Figure 5 shown, close the AC power main switch K1, and the power indicator light HL1 will light up; connect the lead-out wires of the closing and tripping coils JX of the permanent magnet circuit breakers to be run-in and tested to the five permanent magnet control mechanism closing and tripping coil connection interfaces X respectively, and use the normally closed contacts of the reflect closing and tripping state relays in the closing and tripping circuits of the five permanent magnet circuit breakers as Figure 5The normally-closed contact J2 for sampling the opening and closing states of the five counting relays JC is connected thereto; when performing an automatic running-in test, first set the running-in count values on the five counting relays JC respectively, and then turn the automatic or manual changeover switch K2 to the automatic position; then close the power rotation switches K5 of the five driving modules, and the logic control module IC1 will automatically control the five permanent magnet circuit breakers to perform the running-in test simultaneously through the five permanent magnet manipulation mechanism driving modules IC2 according to the pre-set operating program, and the running-in test data and results will be displayed on the display screen 3 of the logic control module; during the running-in test process, when the five permanent magnet circuit breakers are in the closed state, the opening and closing state relay on their opening and closing circuits controls the normally-closed contact J2 for sampling the opening and closing states to open, and when the five permanent magnet circuit breakers are in the open state, the opening and closing state relay on their opening and closing circuits controls the normally-closed contact J2 for sampling the opening and closing states to close, and respectively inputs the counting information of each running-in test to the five counting relays JC; when the running-in test times of any one of the permanent magnet circuit breakers reach the set times, the normally-closed contact J1 of the control output of the counting relay JC opens, and the permanent magnet manipulation mechanism driving module IC2 associated with this permanent magnet circuit breaker loses power, and the running-in test of this permanent magnet circuit breaker will automatically stop; when a new round of running-in test or re-running-in test is to be performed, press the counting reset push-button switch on the counting relay JC, and the counting data on the counting relay JC will be cleared; when performing a manual running-in test, turn the automatic or manual changeover switch K2 to the manual position, press the manual closing push-button switch K3, and the five permanent magnet manipulation mechanism driving modules IC2 will respectively control the five permanent magnet circuit breakers to close, and press the manual opening push-button switch K4, and the five permanent magnet manipulation mechanism driving modules IC2 will respectively control the five permanent magnet circuit breakers to open; the manual opening and closing operations are often used for pre-tests before performing an automatic running-in test. Only when there is no problem after several manual opening and closing operations, the automatic running-in test is started.

[0041] Such as Figure 6As shown, when the closing signal is output from pin 1 of the first output terminal Q1 of the logic control module IC1, the closing signal input terminal HZ of the permanent magnet control mechanism drive module IC2 is powered on, the first field effect transistor VT1 and the fourth field effect transistor VT4 are turned on, the first field effect transistor VT2 and the fourth field effect transistor VT3 are turned off, the energy storage capacitor C1 outputs the positive pole of the DC 380V voltage to one pole U1 of the control output terminal of IC2, and outputs the negative pole of the DC 380V voltage to the other pole U2 of the control output terminal. At this time, the closing and opening coils JX of the five permanent magnet circuit breakers obtain a positive voltage, respectively driving the five permanent magnet circuit breakers to close; when the opening signal is output from pin 1 of the second output terminal Q2 of the logic control module IC1, the opening signal input terminal FZ of the permanent magnet control mechanism drive module IC2 is powered on, the first field effect transistor VT2 and the fourth field effect transistor VT3 are turned on, the first field effect transistor VT1 and the fourth field effect transistor VT4 are turned off, the energy storage capacitor C1 outputs the positive pole of the DC 380V voltage to the other pole U2 of the control output terminal of IC2, and outputs the negative pole of the DC 380V voltage to one pole U1 of the control output terminal. At this time, the closing and opening coils JX of the five permanent magnet circuit breakers obtain a reverse voltage, respectively driving the five permanent magnet circuit breakers to open.

Claims

1. An automatic running-in test device for a permanent magnet circuit breaker of a switch cabinet, comprising a box body and a control panel arranged on the box body. The control panel is provided with a main AC power switch, a display screen of a logic control module, an automatic or manual transfer switch, a manual closing push-button switch, a manual opening push-button switch, and more than two connection interfaces for the closing and opening coils of the permanent magnet control mechanism. A control circuit is arranged on the box body; the control circuit includes a main AC power switch, a logic control module, more than two driving modules for the permanent magnet control mechanism, an AC-DC power module, an automatic or manual transfer switch, a manual closing push-button switch, a manual opening push-button switch, and more than two connection interfaces for the closing and opening coils of the permanent magnet control mechanism; wherein the input end of the main AC power switch is connected to an AC power supply, and the output end of the main AC power switch is connected to the power input end of the logic control module; one end of the automatic or manual transfer switch is connected to the live wire of the output end of the main AC power switch, and the other end is connected to one input end of the logic control module; the first output end of the logic control module is divided into several paths, one of which is connected to the manual closing push-button switch, and each of the other paths is respectively connected to the closing signal input end of a driving module for the permanent magnet control mechanism; the second output end of the logic control module is divided into several paths, one of which is connected to the manual opening push-button switch, and each of the other paths is respectively connected to the opening signal input end of a driving module for the permanent magnet control mechanism; the control output end of each driving module for the permanent magnet control mechanism is respectively connected to a connection interface for the closing and opening coils of the permanent magnet control mechanism; the power input end of the AC-DC power module is connected to the output end of the main AC power switch, and the power output end of the AC-DC power module is divided into several paths, and each path is respectively connected to the DC power input end of a driving module for the permanent magnet control mechanism; its characteristics are: The control circuit further includes two or more counting relays. The power supply terminals of the counting relays are respectively connected to the output terminal of the AC power supply main switch. The normally closed control output contacts of each counting relay are respectively connected in series to the DC power supply input circuit of one of the permanent magnet control mechanism drive modules. A normally closed contact for sampling the opening / closing state is connected to the signal input terminal of each counting relay.

2. The automatic running-in test device for the permanent magnet circuit breaker of the switch cabinet according to claim 1, wherein: Each path of the power supply output terminal of the AC-DC power supply module is respectively connected to the DC power supply input terminal of one of the permanent magnet control mechanism drive modules through a drive module power supply rotary switch. The normally closed control output contact of the counting relay is connected in series to the DC power supply input circuit of the permanent magnet control mechanism drive module in front of the drive module power supply rotary switch.

3. The automatic running-in test device for the permanent magnet circuit breaker of the switch cabinet according to claim 1 or 2, characterized in that: The first output terminal and the second output terminal of the logic control module are relay-type output terminals. The first output terminal has a pair of pins. One of the pins of the first output terminal is divided into several paths. One path is connected to the manual closing button switch, and each of the other paths is respectively connected to the closing signal input terminal of one of the permanent magnet control mechanism drive modules. The second pin of the first output terminal is connected to the common terminal. The second output terminal also has a pair of pins. One of the pins of the second output terminal is divided into several paths. One path is connected to the manual opening button switch, and each of the other paths is respectively connected to the opening signal input terminal of one of the permanent magnet control mechanism drive modules. The second pin of the second output terminal is connected to the common terminal.

4. The automatic running-in test device for the permanent magnet circuit breaker of the switch cabinet according to claim 3, characterized in that: The second pin of the first output terminal of the logic control module and the second pin of the second output terminal are both connected to the common terminal on the two or more permanent magnet control mechanism drive modules.

5. The automatic running-in test device for the permanent magnet circuit breaker of the switch cabinet according to claim 3, wherein: One of the pins of the first output terminal of the logic control module is connected to one end of the manual closing button switch. One of the pins of the second output terminal of the logic control module is connected to one end of the manual opening button switch. The other ends of the manual closing button and the manual opening button switch are both connected to the second pin of the first output terminal of the logic control module, the second pin of the second output terminal of the logic control module, and the common terminal on the two or more permanent magnet control mechanism drive modules.

6. The automatic running-in test device for the permanent magnet circuit breaker of the switch cabinet according to claim 1 or 2, characterized in that: Energy storage information acquisition terminals are respectively provided on the two or more permanent magnet control mechanism drive modules. The power supply terminals of the energy storage information acquisition terminals are respectively connected to the positive pole of the power supply output terminal of the AC-DC power supply module. The common terminals of the energy storage information acquisition terminals are respectively connected to the negative pole of the power supply output terminal of the AC-DC power supply module. Energy storage capacitor full indicator lights are respectively connected between the common terminal of the energy storage information acquisition terminal and the negative pole of the power supply output terminal of the AC-DC power supply module. When the energy storage capacitor is full, a loop is formed between the power supply terminal and the common terminal of the energy storage information acquisition terminal, and the energy storage capacitor full indicator light lights up.

7. The automatic running-in test device for the permanent magnet circuit breaker of the switch cabinet according to claim 1 or 2, characterized in that: The permanent magnet operating mechanism drive module adopts a ZC-B-JGB2 type permanent magnet operating mechanism drive module, which is composed of a DC booster, an energy storage capacitor, a first field effect transistor, a second field effect transistor, a third field effect transistor and a fourth field effect transistor, and is provided with a DC power input terminal, a control output terminal, a closing signal input terminal and a tripping signal input terminal; wherein the power input terminal of the DC booster is connected to the DC power input terminal; the positive pole of the power output terminal of the DC booster is divided into two paths, one path is connected to the positive pole of the energy storage capacitor, and the other path is connected in parallel to the drain electrodes of the first field effect transistor and the second field effect transistor; the negative pole of the power output terminal of the DC booster is divided into two paths, one path is connected to the negative pole of the energy storage capacitor, and the other path is connected in parallel to the source electrodes of the third field effect transistor and the fourth field effect transistor; the gate electrodes of the first field effect transistor and the fourth field effect transistor are connected in parallel to the closing signal input terminal, and the gate electrodes of the second field effect transistor and the third field effect transistor are connected in parallel to the tripping signal input terminal; the source electrode of the first field effect transistor and the drain electrode of the third field effect transistor are connected in parallel to one pole of the control output terminal, and the source electrode of the second field effect transistor and the drain electrode of the fourth field effect transistor are connected in parallel to the other pole of the control output terminal.

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