CN209946322U - Electrical control system of circuit breaker operation box - Google Patents
Electrical control system of circuit breaker operation box Download PDFInfo
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- CN209946322U CN209946322U CN201920297510.8U CN201920297510U CN209946322U CN 209946322 U CN209946322 U CN 209946322U CN 201920297510 U CN201920297510 U CN 201920297510U CN 209946322 U CN209946322 U CN 209946322U
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Abstract
The utility model discloses a technical field of circuit breaker running-in test, in particular to an electrical control system of a circuit breaker operation box, which comprises a power supply circuit and a control circuit; the power supply circuit comprises a power supply input end, a transformer, a circuit switch SW and a direct current and alternating current conversion circuit; the control circuit is connected with the circuit switch SW and comprises a closing circuit, a separating circuit, a running-in starting circuit, a fault alarm circuit and a monitoring circuit; the break-in starting circuit controls the breaker to carry out switch-on and switch-off respectively through the switch-on circuit and the switch-off circuit, and the fault alarm circuit and the monitoring circuit are respectively connected with the break-in starting circuit to monitor the break-in starting circuit; the utility model discloses can set for operation number of times and switching voltage form, make the circuit breaker carry out the circulation operation of divide-shut brake, have combined floodgate, separating brake, energy storage and running-in completion status indication, can monitor the divide-shut brake trouble simultaneously.
Description
Technical Field
The utility model relates to a technical field of circuit breaker break-in test specifically is an electrical control system of circuit breaker control box.
Background
High-voltage circuit breakers play a role in protection and control of electrical equipment, such as overload and short-circuit, in high-voltage power supply and distribution systems. Before leaving a factory, the circuit breaker is generally required to be subjected to two tests of electrical line detection and mechanical opening and closing performance, wherein a running-in test, namely a mechanical and electric opening and closing service life test, is the most important test and the necessary test for high-voltage circuit breaker detection, and the closing and opening of the circuit breaker are realized by connecting a closing control loop and an opening control loop of the circuit breaker through a contactor.
At present, a portable running-in test instrument, namely an operation box with small volume and convenient carrying, is widely used in domestic power distribution systems, and after investigation, the portable running-in test instrument is mostly used for testing the stroke of opening and closing or testing the opening and closing speed, and the circuit breaker is not subjected to cyclic running-in test on opening and closing, so that the service life of the circuit breaker is tested. Therefore, the present application has been developed and improved in view of the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electrical control system of circuit breaker control box makes the circuit breaker at the separating brake and the combined floodgate operation of circulation between, tests circuit breaker's life.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides an electrical control system of circuit breaker control box, is applied to portable circuit breaker control box for the closing and the separating brake test of circuit breaker, include:
the power supply circuit comprises a power supply input end, a transformer, a circuit switch and a direct current-alternating current conversion circuit; the power supply input end is connected with the circuit switch, the circuit switch is connected with the transformer, one end of the direct current-alternating current conversion circuit is connected with the transformer, and the other end of the direct current-alternating current conversion circuit is connected with the circuit breaker;
the control circuit is connected with the circuit switch and comprises a closing circuit, a separating circuit, a running-in starting circuit, a fault alarm circuit and a monitoring circuit; the break-in starting circuit controls the break-in and break-out of the breaker respectively through the break-in circuit and the break-out circuit; the fault alarm circuit and the monitoring circuit are respectively connected with the running-in starting circuit to monitor the running-in starting circuit.
Preferably, the switching-on circuit comprises a first contactor and a first transfer switch, the first transfer switch is connected with a coil of the first contactor, and a normally open contact of the first contactor is connected with a switching-on control end of the circuit breaker;
the switching-off circuit comprises a second contactor and a second change-over switch, the second change-over switch is connected with a coil of the second contactor, and a normally open contact of the second contactor is connected with a switching-off control end of the circuit breaker;
the running-in starting circuit comprises a first button switch, a counting relay, a second time relay and a fourth time relay; the first button switch is closed, so that the second time relay or the fourth time relay is electrified; the second time relay is electrified to enable the first contactor to be electrified, and the breaker is switched on; the fourth time relay is electrified to enable the second contactor to be electrified, and the breaker is switched off; and the counting relay records the switching-on and switching-off cycle times of the circuit breaker.
Preferably, the break-in starting circuit further comprises a third contactor and a position switch;
one end of the first button switch is connected to the circuit switch, the first button switch at the other end is connected to the normally closed contact of the counting relay, the normally closed contact of the counting relay is also connected to the coil of the third contactor, and the coil of the counting relay is connected to the first button switch;
one end of a normally closed contact of the position switch is connected to the circuit switch, the normally closed contact of the position switch at the other end is connected to a normally open contact of the third contactor, and the normally open contact of the third contactor is also connected to a coil of the second time relay;
and one end of a normally open contact of the position switch is connected with the circuit switch, the normally open contact of the position switch at the other end is connected with the normally open contact of the third contactor, and the normally open contact of the third contactor is also connected with a coil of the fourth time relay.
Preferably, the fault alarm circuit comprises a third time relay and a fifth time relay;
one end of a normally open contact of the second time relay is connected to a coil of the third time relay; one end of the normally closed contact of the third time relay is connected with the normally open contact of the second time relay, and the normally closed contact of the third time relay at the other end is connected with the coil of the first contactor;
and one end of a normally open contact of the fourth time relay is connected to the coil of the fifth time relay, one end of a normally closed contact of the fifth time relay is connected to the normally open contact of the fourth time relay, and the normally closed contact of the fifth time relay at the other end is connected to the coil of the second contactor.
Preferably, the fault alarm circuit further comprises a fourth contactor, a fifth contactor and a first indicator light;
a coil of the fourth contactor is connected to a normally open contact of the third time relay, and the normally open contact of the third time relay is connected to the normally open contact of the third contactor;
a coil of the fifth contactor is connected to a normally open contact of the fifth time relay, and the normally open contact of the fifth time relay is connected to the normally open contact of the third contactor;
the normally open contact of the fourth contactor and the normally open contact of the fifth contactor are connected to the circuit switch respectively, and the normally open contact of the fourth contactor and the normally open contact of the fifth contactor are connected to the first indicator lamp respectively.
Preferably, the monitoring circuit comprises a first time relay, a buzzer and a second indicator light; one end of a normally open contact of the counting relay is connected to the circuit switch, the normally open contact of the counting relay at the other end is connected to a normally closed contact of the second time relay, and the normally closed contact of the second time relay is also connected to the buzzer; and the coil of the first time relay and the second indicator light are respectively connected to the normally open contact of the counting relay.
Preferably, the dc-ac conversion circuit includes a sixth contactor, a second button switch and a rectifier bridge; one end of a normally closed contact of the sixth contactor is connected to the power input end of the circuit breaker, and the normally closed contact of the sixth contactor at the other end is connected to the transformer; one end of a normally open contact of the sixth contactor is connected to the transformer, the normally open contact of the sixth contactor at the other end is connected to one end of the rectifier bridge, and the rectifier bridge at the other end is connected to the power input end of the circuit breaker; one end of the second button switch is connected to the circuit switch, and the second button switch at the other end is connected to the coil of the sixth contactor.
Preferably, the power supply circuit further comprises a tank circuit; the energy storage circuit comprises a capacitor and a resistor; the capacitor and the resistor are connected in parallel to form an RC circuit, one end of the RC circuit is connected to the output end of the rectifier bridge, and the RC circuit at the other end is connected to the power input end of the circuit breaker.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the automatic operation times can be set through the counting relay PC, and the running-in starting circuit enables the circuit breaker to perform the cyclic operation of opening and closing through controlling the closing circuit and the opening circuit, so that the service life of the circuit breaker is tested;
2. switching a voltage form (alternating current/direct current) through an alternating current/direct current conversion circuit to provide alternating current or direct current;
3. the intelligent brake system has the advantages that the brake closing, brake separating, energy storage and running-in completion state indication is realized, and the state of the circuit is monitored through the indicator lamp and the buzzer, so that the maintenance is timely carried out when a breaker is in brake separating or brake closing fault.
Drawings
FIG. 1 is a control schematic diagram of the present invention;
fig. 2 is an electrical connection diagram of the present invention.
The utility model discloses well electric actuator includes: the device comprises a counting relay PC, a circuit switch SW, a first contactor KM1, a second contactor KM2, a third contactor KM3, a fourth contactor KM4, a fifth contactor KM5, a first transfer switch SA1, a second transfer switch SA2, a first time relay KT1, a second time relay KT2, a third time relay KT3, a fourth time relay KT4, a fifth time relay KT5, a sixth contactor KM6, a position switch XS, a first button switch SB1, a second button switch SB2, a first indicator lamp RL, a second indicator lamp OL, a third indicator lamp GL, a buzzer HAB and a horn HAU.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
As shown in fig. 1 and 2, an electrical control system of a circuit breaker operation box is applied to a portable circuit breaker operation box, and is used for testing the switching-on and switching-off times of a circuit breaker QF so as to judge the service life of the circuit breaker, and the control system comprises a power supply circuit 100 and a control circuit 200.
The power supply circuit 100 includes a power input terminal, a transformer T, a circuit switch SW, a dc-ac conversion circuit 110 and an energy storage circuit 120; the power supply input end is connected with a circuit switch SW, the circuit switch SW is connected with a transformer T, the circuit switch SW is connected with a third indicator lamp GL and used for monitoring the state of the power supply input end, and the circuit switch SW adopts an air switch; one end of the dc/ac conversion circuit 110 is connected to the transformer T, and the dc/ac conversion circuit 110 at the other end is connected to the breaker QF; one end of the energy storage circuit 120 is connected with the direct current-alternating current conversion circuit, and the energy storage circuit 120 at the other end is connected with the circuit breaker; the power input terminal supplies voltage to the control circuit 200, and simultaneously supplies voltage to the dc/ac conversion circuit 110 through the transformer T, the dc/ac conversion circuit 110 is used to switch ac and dc, and the dc/ac conversion circuit 110 supplies power to the breaker QF. In this embodiment, the power input terminal is connected to a commercial power to provide power, and the voltage of the commercial power is preferably 110V to 265V.
Specifically, the dc-ac conversion circuit 110 includes a sixth contactor KM6, a second push-button switch SB2, and a rectifier bridge; one end of a normally closed contact of a sixth contactor KM6 is connected to a power input end of a breaker QF (joints X1 and X3 in FIG. 2 are used for connecting the breaker QF, a normally closed contact of a sixth contactor KM6 at the other end is connected to a transformer T, one end of a normally open contact of the sixth contactor KM6 is connected to the transformer T, a normally open contact of a sixth contactor KM6 at the other end is connected to one end of a rectifier bridge, the other end of the rectifier bridge is connected to the power input end of the breaker QF, one end of a second button switch SB2 is connected to a circuit switch SW, a second button switch SB2 at the other end is connected to a coil of the sixth contactor KM6, the second button switch SB2 is closed, the coil of the sixth contactor KM6 is electrified, the normally closed contact of the sixth contactor KM6 is opened, and the normally open contact of the sixth contactor KM.
Specifically, the energy storage circuit 120 is connected between the rectifier bridge and the breaker QF; further, the tank circuit 120 includes a capacitor C and a resistor R; the capacitor C and the resistor R are connected in parallel to form an RC circuit, one end of the RC circuit is connected to the output end of the rectifier bridge, the RC circuit at the other end is connected to the power input end of the breaker QF, and the RC circuit provides voltage for the breaker QF to achieve a voltage stabilizing function.
The control circuit 200 includes a closing circuit 210, an opening circuit 220, a break-in start circuit 230, a fault alarm circuit 240, and a monitoring circuit 250.
The closing circuit 210 comprises a first contactor KM1 and a first transfer switch SA 1; one end of the first transfer switch SA1 is connected to the circuit switch SW, the first transfer switch SA1 at the other end is connected to the coil of the first contactor KM1, and the normally open contact of the first contactor KM1 is connected to the closing control end of the breaker QF, i.e., the terminals 4 and 6 in fig. 2.
The switching-off circuit 220 comprises a second contactor KM2 and a second transfer switch SA 2; one end of the second transfer switch SA2 is connected to the circuit switch SW, the other end of the second transfer switch SA2 is connected to the coil of the second contactor KM2, and the normally open contact of the second contactor KM2 is connected to the opening control end of the breaker QF, i.e., the terminals 5 and 7 in fig. 2.
A break-in starting circuit 230 comprising a first push-button switch SB1, a counting relay PC, a third contactor KM3, a position switch XS, a second time relay KT2 and a fourth time relay KT 4; one end of the first button switch SB1 is connected to the circuit switch SW, the first button switch SB1 at the other end is connected to the normally closed contact of the counting relay PC, the normally closed contact of the counting relay PC is connected to the coil of the third contactor KM3, and the coil of the counting relay PC is connected to the first button switch SB 1; one end of a normally closed contact of the position switch XS is connected to the circuit switch SW, a normally closed contact of the position switch XS at the other end is connected to a normally open contact of the third contactor KM3, and a normally open contact of the third contactor KM3 is connected to a coil of the second time relay KT 2; one end of a normally open contact of the position switch XS is connected to the circuit switch SW, a normally closed contact of the position switch XS at the other end is connected to a normally open contact of the third contactor KM3, and the normally open contact of the third contactor KM3 is connected to a coil of the fourth time relay KT 4. And the counting relay PC is used for calculating the operation times of automatic switching-on and switching-off of the breaker QF.
The fault alarm circuit 240 comprises a third time relay KT3, a fifth time relay KT5, a fourth contactor KM4, a fifth contactor KM5, a first indicator lamp RL and a horn HAU.
Specifically, a normally closed contact of the third time relay KT3 is connected between a normally open contact of the second time relay KT2 and a coil of the first contactor KM1, one end of a normally open contact of the second time relay KT2 is connected to the circuit switch SW, and a normally open contact of the second time relay KT2 at the other end is connected to a coil of the third time relay KT 3; a normally closed contact of the fifth time relay KT5 is connected between a normally open contact of the fourth time relay KT4 and a coil of the second contactor KM 2; one end of a normally open contact of the fourth time relay KT4 is connected with the circuit switch SW, and the normally open contact of the fourth time relay KT4 at the other end is connected with a coil of the fifth time relay KT 5; a coil of the fourth contactor KM4 is connected with a normally open contact of a third time relay KT3, and a normally open contact of the third time relay KT3 is connected with a normally open contact of a third contactor KM 3; a coil of the fifth contactor KM5 is connected with a normally open contact of a fifth time relay KT5, and a normally open contact of the fifth time relay KT5 is connected with a normally open contact of a third contactor KM 3; the fourth contactor KM4 and the fifth contactor KM5 are respectively connected to a first indicator lamp RL; when the fault of the opening or closing is detected, the normally closed contact of the third time relay KT3 is opened or the normally closed contact of the fifth time relay KT5 is opened, the running-in test is stopped, and the circuit is protected.
Specifically, one end of the normally open contact of the fourth contactor KM4 and one end of the normally open contact of the fifth contactor KM5 are connected to the circuit switch SW, and the other ends are connected to the horn HAU.
Specifically, the first indicator light RL is respectively connected to a normally closed contact and a normally open contact of the position switch XS and used for monitoring the opening and closing fault.
When detecting that circuit breaker QF separating brake or combined floodgate break down, the normally open contact of third time relay KT3 or the normally open contact of fifth time relay KT5 is closed, make fourth contactor KM 4's coil or fifth contactor KM 5's coil electrified, fourth contactor KM 4's normally open contact or fifth contactor KM 5's normally open contact is closed, loudspeaker HAU sounds, first pilot lamp is bright, the presentation breaks down, be used for the alarm effect.
A monitoring circuit 250 including a first time relay KT1, a buzzer HAB, and a second indicator light OL; the second indicator light OL is a yellow indicator light and indicates that the running-in test is finished; one end of a normally open contact of the counting relay PC is connected with the circuit switch SW, the other end of the normally open contact of the counting relay PC is connected with a normally closed contact of a second time relay KT2, and the normally closed contact of the second time relay KT2 is connected with a buzzer HAB; a coil of the first time relay KT1 and a second indicator lamp OL are respectively connected with a normally open contact of the counting relay PC; the coil of the first time relay KT1 is connected with an electric bell, the first time relay KT1 is electrified, and the electric bell works and is used for indicating that the running-in test is finished.
Specifically, when the running-in test is finished, a normally open contact of the counting relay PC is closed; in the first situation, the normally closed contact of the counting relay PC is disconnected, the coil of the third contactor KM3 is powered off, the normally open contact of the third contactor KM3 is disconnected, the coil of the second time relay KT2 is powered off, the normally closed contact of the second time relay KT2 in the monitoring circuit is disconnected, and the buzzer HAB does not work and is in a normal state; in the first situation, after the running-in test is finished, the normally closed contact of the second time relay KT2 is still closed, and the buzzer HAB sounds to indicate that the counting relay PC is in fault.
Manual control: the first transfer switch SA1 is closed, the coil of the first contactor KM1 is electrified, the normally open contact of the first contactor KM1 is closed, the coil of the first contactor KM1 is electrified, and the breaker QF is switched on; and the second transfer switch SA2 is closed, and the coil of the second contactor KM2 is electrified, so that the breaker QF is opened.
Automatic control: when the first button switch SB1 is closed, the coil of the third contactor KM3 is electrified, the normally open contact of the third contactor KM3 is closed, the coil of the second time relay KT2 is electrified, so that the normally open contact of the second time relay KT2 is closed, the coil of the first contactor KM1 is electrified, the normally open contact of the first contactor KM1 is closed, and the breaker QF is switched on; after the breaker QF is switched on, the normally closed contact of the position switch XS is disconnected, the normally open contact of the position switch XS is closed, the coil of the fourth time relay KT4 is electrified, the normally open contact of the fourth time relay KT4 is closed, the coil of the second contactor KM2 is electrified, the breaker QF is switched off, after the breaker QF is switched off, the normally closed contact of the position switch XS is closed, the normally open contact of the position switch XS is disconnected, the coil of the second time relay KT2 is electrified, the breaker QF is switched on, the circuit breaker QF is switched on and switched off in a circulating mode, when the number of automatic operation times reaches a set value, the coil of the counting relay PC is electrified, the normally closed contact of the counting relay PC is disconnected, the normally open contact of the counting relay PC is closed, the coil of the first time relay KT1 is electrified.
And (3) fault display: when the breaker QF performs a closing action, the normally closed contact of the position switch XS is not disconnected, the breaker QF is still in a breaking state, when a closing fault occurs, after the time set by the third time relay KT3 is reached, the coil of the third time relay KT3 is electrified, the normally closed contact of the third time relay KT3 is disconnected, the coil of the first contactor KM1 is powered off, the normally open contact of the first contactor KM1 is disconnected, the closing action is finished, the normally open contact of the third time relay KT3 is closed, the coil of the fourth contactor KM4 is electrified, the normally open contact of the fourth contactor KM4 is closed, the horn HAU works, and the first indicator lamp RL is bright; when the breaker QF carries out the separating brake action, the normally open contact of position switch X2 does not have the closure, breaker QF still is the combined floodgate state, when for the separating brake trouble, reach the time back that fifth time relay KT5 set for, fifth time relay KT 5's coil circular telegram, fifth time relay KT 5's normally open contact disconnection, make second contactor KM 2's coil outage, the normally open contact disconnection of second contactor KM2, the separating brake action is ended, fifth time relay KT 5's normally open contact is closed, fifth contactor KM 5's coil is electrified, fifth contactor KM 5's normally open contact is closed, loudspeaker HAU work, first pilot lamp RL is bright.
The utility model has the advantages that:
(1) the number of automatic operation times can be set through the counting relay PC, the running-in starting circuit 230 enables the breaker QF to perform the cyclic operation of opening and closing through controlling the closing circuit 210 and the opening circuit 220, and the service life of the breaker QF is tested;
(2) the voltage form (ac/dc) is switched by the ac/dc conversion circuit 110 to provide ac or dc;
(3) the intelligent brake system has the advantages that the brake closing, brake separating, energy storage and running-in completion state indication is realized, and the state of the circuit is monitored through the first indicator light RL, the second indicator light OL, the third indicator light GL, the buzzer HAB and the horn HAU, so that the intelligent brake system can be maintained in time when a breaker QF brake separating or brake closing fault occurs.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides an electrical control system of circuit breaker control box, is applied to portable circuit breaker control box for the combined floodgate of circuit breaker and separating brake test, its characterized in that includes:
the power supply circuit comprises a power supply input end, a transformer, a circuit switch and a direct current-alternating current conversion circuit; the power supply input end is connected with the circuit switch, the circuit switch is connected with the transformer, one end of the direct current-alternating current conversion circuit is connected with the transformer, and the direct current-alternating current conversion circuit at the other end is connected with the circuit breaker;
the control circuit is connected with the circuit switch and comprises a closing circuit, a separating circuit, a running-in starting circuit, a fault alarm circuit and a monitoring circuit; the break-in starting circuit controls the break-in and break-out of the breaker respectively through the break-in circuit and the break-out circuit; the fault alarm circuit and the monitoring circuit are respectively connected with the running-in starting circuit to monitor the running-in starting circuit.
2. The electrical control system of a circuit breaker operating box of claim 1, wherein the closing circuit comprises a first contactor and a first transfer switch, the first transfer switch is connected to a coil of the first contactor, and a normally open contact of the first contactor is connected to a closing control terminal of the circuit breaker;
the switching-off circuit comprises a second contactor and a second change-over switch, the second change-over switch is connected with a coil of the second contactor, and a normally open contact of the second contactor is connected with a switching-off control end of the circuit breaker;
the running-in starting circuit comprises a first button switch, a counting relay, a second time relay and a fourth time relay; the first button switch is closed, so that the second time relay or the fourth time relay is electrified; the second time relay is electrified to enable the first contactor to be electrified, and the breaker is switched on; the fourth time relay is electrified to enable the second contactor to be electrified, and the breaker is switched off; and the counting relay records the switching-on and switching-off cycle times of the circuit breaker.
3. The electrical control system of a circuit breaker operating box of claim 2, wherein the break-in start circuit further comprises a third contactor and a position switch;
one end of the first button switch is connected to the circuit switch, the first button switch at the other end is connected to the normally closed contact of the counting relay, the normally closed contact of the counting relay is also connected to the coil of the third contactor, and the coil of the counting relay is connected to the first button switch;
one end of a normally closed contact of the position switch is connected to the circuit switch, the normally closed contact of the position switch at the other end is connected to a normally open contact of the third contactor, and the normally open contact of the third contactor is also connected to a coil of the second time relay;
and one end of a normally open contact of the position switch is connected with the circuit switch, the normally open contact of the position switch at the other end is connected with the normally open contact of the third contactor, and the normally open contact of the third contactor is also connected with a coil of the fourth time relay.
4. The electrical control system of a circuit breaker operating box of claim 3, wherein the fault warning circuit includes a third time relay and a fifth time relay;
one end of a normally open contact of the second time relay is connected to a coil of the third time relay; one end of the normally closed contact of the third time relay is connected with the normally open contact of the second time relay, and the normally closed contact of the third time relay at the other end is connected with the coil of the first contactor;
and one end of a normally open contact of the fourth time relay is connected to the coil of the fifth time relay, one end of a normally closed contact of the fifth time relay is connected to the normally open contact of the fourth time relay, and the normally closed contact of the fifth time relay at the other end is connected to the coil of the second contactor.
5. The electrical control system of a circuit breaker operating box of claim 4, wherein the fault warning circuit further comprises a fourth contactor, a fifth contactor, and a first indicator light;
a coil of the fourth contactor is connected to a normally open contact of the third time relay, and the normally open contact of the third time relay is connected to the normally open contact of the third contactor;
a coil of the fifth contactor is connected to a normally open contact of the fifth time relay, and the normally open contact of the fifth time relay is connected to the normally open contact of the third contactor;
the normally open contact of the fourth contactor and the normally open contact of the fifth contactor are connected to the circuit switch respectively, and the normally open contact of the fourth contactor and the normally open contact of the fifth contactor are connected to the first indicator lamp respectively.
6. The electrical control system of a circuit breaker operating box of claim 3, wherein the monitoring circuit includes a first time relay, a buzzer, and a second indicator light; one end of a normally open contact of the counting relay is connected to the circuit switch, the normally open contact of the counting relay at the other end is connected to a normally closed contact of the second time relay, and the normally closed contact of the second time relay is also connected to the buzzer; and the coil of the first time relay and the second indicator light are respectively connected to the normally open contact of the counting relay.
7. The electrical control system of a circuit breaker operating box of claim 1, wherein the dc-ac conversion circuit includes a sixth contactor, a second push button switch, and a rectifier bridge; one end of a normally closed contact of the sixth contactor is connected to the power input end of the circuit breaker, and the normally closed contact of the sixth contactor at the other end is connected to the transformer; one end of a normally open contact of the sixth contactor is connected to the transformer, the normally open contact of the sixth contactor at the other end is connected to one end of the rectifier bridge, and the rectifier bridge at the other end is connected to the power input end of the circuit breaker; one end of the second button switch is connected to the circuit switch, and the second button switch at the other end is connected to the coil of the sixth contactor.
8. The electrical control system of a circuit breaker operating box of claim 7, wherein the power supply circuit further comprises an energy storage circuit; the energy storage circuit comprises a capacitor and a resistor; the capacitor and the resistor are connected in parallel to form an RC circuit, one end of the RC circuit is connected to the output end of the rectifier bridge, and the RC circuit at the other end is connected to the power input end of the circuit breaker.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920297510.8U CN209946322U (en) | 2019-03-09 | 2019-03-09 | Electrical control system of circuit breaker operation box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920297510.8U CN209946322U (en) | 2019-03-09 | 2019-03-09 | Electrical control system of circuit breaker operation box |
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| CN201920297510.8U Active CN209946322U (en) | 2019-03-09 | 2019-03-09 | Electrical control system of circuit breaker operation box |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114839527A (en) * | 2022-07-04 | 2022-08-02 | 国网辽宁省电力有限公司 | Circuit breaker detection device with power supply |
| CN115877201A (en) * | 2023-03-09 | 2023-03-31 | 广东正超电气有限公司 | Break-in test power supply vehicle of switch cabinet breaker |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114839527A (en) * | 2022-07-04 | 2022-08-02 | 国网辽宁省电力有限公司 | Circuit breaker detection device with power supply |
| CN115877201A (en) * | 2023-03-09 | 2023-03-31 | 广东正超电气有限公司 | Break-in test power supply vehicle of switch cabinet breaker |
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