CN210245963U

CN210245963U - Novel GIS breaker anti-tripping loop

Info

Publication number: CN210245963U
Application number: CN201920588263.7U
Authority: CN
Inventors: Zhen Li; 李�真; Shuo Wang; 王烁
Original assignee: Shandong Dachi High Voltage Switchgear Co ltd
Current assignee: Shandong Dachi High Voltage Switchgear Co ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-04-03
Anticipated expiration: 2029-04-26

Abstract

The utility model relates to an SF₆The secondary control equipment of the auxiliary equipment of the gas insulated metal enclosed switch, especially relate to a novel GIS circuit breaker and prevent jumping the return circuit, including the dynamic break contact 30-32 of the auxiliary contact a/2 of circuit breaker, dynamic break contact 31-32 of the anti-tripping relay 52Y that connects in series sequentially, then connect the dynamic make contact 13-14 of the anti-tripping relay 52Y and dynamic make contact 9-11 of the auxiliary contact a/1 of circuit breaker connected in parallel each other in series, connect coil A1-A2 of the anti-tripping relay 52Y in series finally, then connect to the negative circuit; wherein the break contact 31-32 of the anti-tripping relay 52Y is arranged between the make contact 9-11 of the auxiliary contact a/1 of the circuit breakerAnd connecting a closing loop. The utility model aims at providing a circuit breaker anti-bouncing loop of reliable and stable performance, simple structure, the operation of being convenient for and be applicable to unmanned on duty's transformer substation.

Description

Novel GIS breaker anti-tripping loop

Technical Field

The utility model relates to an SF₆Secondary control equipment of auxiliary equipment of a gas insulated metal-enclosed switch, in particular to a novel anti-tripping loop of a GIS breaker.

Background

At present, the circuit breaker control principle of the SF6 gas insulated metal enclosed switchgear with the voltage of 110kV or more is as follows: the circuit breaker comprises a circuit breaker opening/closing loop, an energy storage loop, a low-pressure locking loop, a motor control loop, a monitoring loop and the like, the various electric loops are connected together through cables to realize the operation of the circuit breaker, the control principle is simple, effective anti-tripping protection is not carried out on a circuit breaker mechanism electrically, and the phenomenon that when the circuit breaker is subjected to closing operation, a circuit breaks down and continuous tripping and closing jump occur is easily caused.

The existing GIS breaker anti-tripping resetting circuit is complex in structure, and the resetting button must be manually operated to disconnect the self-holding circuit of the anti-tripping relay.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a circuit breaker anti-bouncing loop of reliable and stable performance, simple structure, the operation of being convenient for and be applicable to unmanned on duty's transformer substation.

The utility model discloses a realize through following technical scheme: a novel GIS circuit breaking anti-tripping loop is characterized by comprising a movable contact 30-32 of an auxiliary contact a/2 of a circuit breaker and a movable contact 31-32 of an anti-tripping relay 52Y which are sequentially connected in series, then a movable contact 13-14 of the anti-tripping relay 52Y and a movable contact 9-11 of the auxiliary contact a/1 of the circuit breaker which are connected in parallel are connected in series, and finally a coil A1-A2 of the anti-tripping relay 52Y is connected in series and then connected to a negative circuit; wherein, a closing loop is connected between the break contact 31-32 of the anti-tripping relay 52Y and the make contact 9-11 of the auxiliary contact a/1 of the circuit breaker.

Preferably, the closing circuit comprises an open contact 21-22 of an anti-tripping relay 52Y, an open contact 21-22 of a direct current contactor 88M, an open contact 2-4 of an auxiliary contact a/1 of a breaker, an open contact 8-6 of the auxiliary contact a/1 of the breaker, an A1-A2 of a closing coil 52C and an open contact 31-32 of an intermediate relay 1ZJ which are sequentially connected in series and then connected to a negative circuit; A1-A2 of the closing coil 52C is connected in parallel with a circuit breaker action indicator PC 1.

Preferably, the circuit breaker mechanism further comprises a brake separating loop, an energy storage loop and a low-pressure locking loop, wherein the brake separating loop comprises a first branch formed by serially connecting the moving contact 1-3 of the auxiliary contact a/1 of the circuit breaker and the moving contact 7-5 of the auxiliary contact a/1 of the circuit breaker, a second branch formed by serially connecting the moving contact 9-11 of the auxiliary contact a/2 of the circuit breaker and the moving contact 15-13 of the auxiliary contact a/2 of the circuit breaker, the first branch is connected with the second branch in parallel and then serially connected with A1-A2 of the brake separating coil 52T1, and then connected to a negative line through the moving contact 31-32 of the intermediate relay 1 ZJ; the energy storage loop comprises a dynamic break contact 3-4 of a limit switch hb1 and a coil A1-A2 of a direct current contactor 88M which are sequentially connected in series, and then the dynamic break contact is connected to a negative circuit; the low-pressure locking loop comprises a dynamic contact 3-4 of a density relay P and coils A1-A2 of an intermediate relay 1ZJ which are sequentially connected in series, and then connected to a negative circuit.

The utility model has the advantages that: the circuit breaker is very important in GIS equipment, and after the anti-tripping loop is added, the control principle of the circuit breaker is more perfect. The auxiliary contact of the circuit breaker is connected with the relay in series in the GIS control cubicle, and the normally open contact of the relay forms a self-holding loop, so that when the circuit breaker is switched on, the state of the auxiliary contact of the circuit breaker is switched, and the tripping loop is prevented from running, thereby effectively preventing the circuit breaker from jumping during switching-on operation, and when a circuit is in fault, the circuit is tripped continuously and switched on, so that the circuit breaker is safe and reliable in running, has high practicability, and is very suitable for running in an unattended transformer substation.

Drawings

Fig. 1 is a control schematic diagram of the present invention.

In the figure, a/1, a/2-breaker auxiliary contacts, 52Y-tripping-prevention relays, PC 1-breaker action indicators, 52C-closing coils, 52T 1-opening coils, 88M-direct current contactors, hb 1-limit switches, 1 ZJ-intermediate relays and P-density relays.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the GIS open circuit anti-trip circuit of the present invention comprises a break contact 30-32 of the breaker auxiliary contact a/2 and a break contact 31-32 of the anti-trip relay 52Y connected in series in sequence, then a break contact 13-14 of the anti-trip relay 52Y and a break contact 9-11 of the breaker auxiliary contact a/1 connected in parallel in series, and finally a coil a1-a2 of the anti-trip relay 52Y connected in series, and then connected to the negative circuit; wherein, a closing loop is connected between the break contact 31-32 of the anti-tripping relay 52Y and the make contact 9-11 of the auxiliary contact a/1 of the circuit breaker.

Preferably, the closing circuit comprises an open contact 21-22 of an anti-tripping relay 52Y, an open contact 21-22 of a direct current contactor 88M, an open contact 2-4 of an auxiliary contact a/1 of a breaker, an open contact 8-6 of the auxiliary contact a/1 of the breaker, an A1-A2 of a closing coil 52C and an open contact 31-32 of an intermediate relay 1ZJ which are sequentially connected in series, and then are connected to a negative circuit; A1-A2 of the closing coil 52C is connected in parallel with a circuit breaker action indicator PC 1.

Preferably, the breaker mechanism further comprises a brake separating loop, an energy storage loop and a low-pressure locking loop, wherein the brake separating loop comprises a first branch formed by serially connecting the moving contact 1-3 of the breaker auxiliary contact a/1 and the moving contact 7-5 of the breaker auxiliary contact a/1, a second branch formed by serially connecting the moving contact 9-11 of the breaker auxiliary contact a/2 and the moving contact 15-13 of the breaker auxiliary contact a/2, the first branch is connected with the second branch in parallel and then serially connected with A1-A2 of the brake separating coil 52T1, and then connected between A1-A2 of the closing coil 52C on the brake separating loop and the moving contact 31-32 of the intermediate relay 1 ZJ.

The energy storage loop comprises a dynamic break contact 3-4 of a limit switch hb1 and a coil A1-A2 of a direct current contactor 88M which are sequentially connected in series, and then the dynamic break contact is connected to a negative circuit; when the coil a1-a2 of the dc contactor 88M is charged, the break contact 21-22 of the dc contactor 88M connected in series to the closing circuit is opened, and the closing circuit is cut off.

The low-pressure locking loop comprises a dynamic contact 3-4 of a density relay P and a coil A1-A2 of an intermediate relay 1ZJ which are sequentially connected in series, and then the dynamic contact is connected to a negative circuit; when the pressure of the air chamber of the circuit breaker is lower than the normal working air pressure, the 3-4 contacts of the density relay P are closed, the coil A1-A2 of the intermediate relay 1ZJ is electrified, the normally closed contacts 31-32 of the intermediate relay 1ZJ are disconnected, the opening and closing circuit is cut off, and the opening and closing operation cannot be carried out at the moment.

When a closing pulse is sent to the circuit breaker, after the circuit breaker is closed, the state of the auxiliary contact of the circuit breaker is switched, the movable contact 9-11 of the auxiliary contact a/1 of the circuit breaker is changed from open to closed, and the movable contact 30-32 of the auxiliary contact a/2 is changed from closed to open.

At the moment, if the switching-on and switching-off control switch SM0 is reset or the switching-on contact of the automatic device is not returned in time, switching-on can be carried out on a fault line and equipment, positive electricity exists all the time at the moment, and because the switching-on contact 9-11 of the auxiliary contact a/1 of the circuit breaker is closed, the anti-tripping relay 52Y is started, the switching-on contact 13-14 of the anti-tripping relay 52Y is closed, and the anti-tripping loop is self-maintained. Meanwhile, the dynamic breaking contacts 21-22 of the anti-tripping relay 52Y are disconnected, a closing loop is cut off, and the anti-tripping relay automatically resets until the positive electricity of the closing is cancelled. The circuit breaker will not "jump" even if the operator still places the control switch in the on position.

The technical features other than those described in the specification are known to those skilled in the art.

Claims

1. A novel GIS breaker anti-tripping loop is characterized by comprising a break contact 30-32 of an auxiliary contact a/2 of a breaker and a break contact 31-32 of an anti-tripping relay 52Y which are sequentially connected in series, then a make contact 13-14 of the anti-tripping relay 52Y and a make contact 9-11 of the auxiliary contact a/1 of the breaker which are connected in parallel are connected in series, and finally a coil A1-A2 of the anti-tripping relay 52Y is connected in series and then connected to a negative circuit; wherein, a closing loop is connected between the break contact 31-32 of the anti-tripping relay 52Y and the make contact 9-11 of the auxiliary contact a/1 of the circuit breaker.

2. The novel GIS breaker anti-tripping circuit of claim 1, wherein the closing circuit comprises the dynamic-breaking contacts 21-22 of the anti-tripping relay 52Y, the dynamic-breaking contacts 21-22 of the DC contactor 88M, the dynamic-breaking contacts 2-4 of the breaker auxiliary contact a/1, the dynamic-breaking contacts 8-6 of the breaker auxiliary contact a/1, A1-A2 of the closing coil 52C, and the dynamic-breaking contacts 31-32 of the intermediate relay 1ZJ, which are connected in series in sequence, and then are connected to a negative line; A1-A2 of the closing coil 52C is connected in parallel with a circuit breaker action indicator PC 1.

3. The novel GIS breaker anti-tripping circuit of claim 1, wherein the breaker mechanism further comprises a first branch circuit, an energy storage circuit and a low-pressure blocking circuit, the first branch circuit comprises a first branch circuit formed by serially connecting the moving contacts 1-3 of the breaker auxiliary contact a/1 and the moving contacts 7-5 of the breaker auxiliary contact a/1, a second branch circuit formed by serially connecting the moving contacts 9-11 of the breaker auxiliary contact a/2 and the moving contacts 15-13 of the breaker auxiliary contact a/2, the first branch circuit is connected in parallel with the second branch circuit and then serially connected with A1-A2 of the breaking coil 52T1, and then connected to the negative line through the moving contacts 31-32 of the intermediate relay 1 ZJ; the energy storage loop comprises a dynamic break contact 3-4 of a limit switch hb1 and a coil A1-A2 of a direct current contactor 88M which are sequentially connected in series, and then the dynamic break contact is connected to a negative circuit; the low-pressure locking loop comprises a dynamic contact 3-4 of a density relay P and coils A1-A2 of an intermediate relay 1ZJ which are sequentially connected in series, and then connected to a negative circuit.