CN-115274359-B - Operating power supply control loop of breaker/isolating switch

Abstract

The invention provides an operating power supply control loop of a circuit breaker/isolating switch, and belongs to the field of GIS switching equipment. The control loop comprises an electromagnetic contactor, a two-position relay, a first branch circuit, a third branch circuit, a fourth branch circuit, a fifth branch circuit, a sixth branch circuit, a seventh branch circuit and a seventh branch circuit, wherein a normally open auxiliary contact of the electromagnetic contactor is connected in series in an operation power loop of the circuit breaker/isolating switch, the two-position relay comprises a reset coil, a setting coil and a normally open auxiliary contact, a remote separation interface of an intelligent terminal of the circuit breaker/isolating switch and the reset coil of the two-position relay are connected in series to form the first branch circuit, a remote separation interface of the intelligent terminal of the circuit breaker/isolating switch and the setting coil of the two-position relay are connected in series to form the second branch circuit, the normally open auxiliary contact of the two-position relay and the coil of the electromagnetic contactor are connected in series to form the third branch circuit, and the first branch circuit, the second branch circuit and the third branch circuit are connected in parallel to be connected between a positive electrode and a negative electrode of a remote control power supply of the circuit breaker/isolating switch. The invention can safely and quickly remotely switch on/off the breaker/isolating switch operation power supply loop.

Inventors

• LV XUNHAO
• GENG FEI
• XU XIAORUI
• MA JIANGPENG
• HU YIJIE
• CHEN DONG
• KU AOPEI
• JIANG FENGHUA
• CHEN YU
• ZHANG KEXUAN
• WANG XINYIN
• LIU LUXUAN
• ZUO BIN
• LI YINGYING
• GUO JINGYUN
• LI SHAOPENG
• Cui Lingqi

Assignees

• 平高集团有限公司
• 河南平芝高压开关有限公司
• 国家电网有限公司
• 国网山东省电力公司临沂供电公司

Dates

Publication Date

20260512

Application Date

20210430

Claims (9)

1. 1. An operating power control loop for a circuit breaker/disconnector, the operating power control loop comprising: An electromagnetic contactor, wherein a normally open auxiliary contact of the electromagnetic contactor is connected in series in an operation power supply loop of the circuit breaker/isolating switch; The remote-control circuit comprises a double-position relay, a first branch circuit, a second branch circuit, a third branch circuit, a first switch, a second switch and a third switch, wherein the remote-control interface of the intelligent terminal of the circuit breaker/the isolating switch is connected with the reset coil of the double-position relay in series to form a first branch circuit, the remote-control interface of the intelligent terminal of the circuit breaker/the isolating switch is connected with the set coil of the double-position relay in series to form a second branch circuit, and the normally-open auxiliary contact of the double-position relay is connected with the coil of the electromagnetic contactor in series to form a third branch circuit; When a remote-closing interface of the intelligent terminal of the circuit breaker/the isolating switch is closed, a set coil of the double-position relay is powered on, so that a normally open auxiliary contact of the double-position relay is closed, and then the coil of the electromagnetic contactor is powered on, so that the normally open auxiliary contact of the electromagnetic contactor is closed, and an operation power supply loop of the circuit breaker/the isolating switch is closed; When the remote tapping port of the intelligent terminal of the breaker/isolating switch is closed, the reset coil of the double-position relay is electrified, so that the normally open auxiliary contact of the double-position relay is disconnected, the coil of the electromagnetic contactor is further powered off, and the normally open auxiliary contact of the electromagnetic contactor is disconnected, so that an operation power supply loop of the breaker/isolating switch is disconnected.
2. 2. The operating power control circuit of a circuit breaker/disconnector according to claim 1, characterized in that the operating power control circuit further comprises a remote/on-site handle comprising two near control contacts and a remote control contact, wherein the two near control contacts of the remote/on-site handle are connected in parallel with the normally open auxiliary contacts of the electromagnetic contactor, respectively, and the remote control contact of the remote/on-site handle is connected in series in said third branch.
3. 3. The circuit breaker/disconnector operating power control circuit according to claim 2, characterized in that in the non-service state the remote/on-site handle is brought to the remote position for opening the near contact and closing the remote contact, and in the service state the remote/on-site handle is brought to the near position for closing the near contact and opening the remote contact.
4. 4. The operating power control circuit of a circuit breaker/disconnector according to claim 1, characterized in that it further comprises 2 on-site switches and 1 remote switch, each on-site switch being connected in parallel with a normally open auxiliary contact of an electromagnetic contactor, respectively, the remote switch being connected in series in said third branch.
5. 5. The circuit breaker/disconnector operating power control circuit according to claim 4, characterized in that in the non-service state the on-site switch is opened and the remote switch is closed, and in the service state the on-site switch is closed and the remote switch is opened.
6. 6. The circuit breaker/disconnector operating power supply control circuit of claim 5, further comprising a switch-out in series.
7. 7. The operating power control circuit of a circuit breaker/disconnector of claim 4, further comprising a switch-off in series.
8. 8. The operating power control circuit of a circuit breaker/disconnector of claim 6, further comprising a pressure plate having one end connected to the positive pole of the remote power supply and the other end connected to a parallel connection point of the remote interface and the remote interface.
9. 9. The operating power control loop of a circuit breaker/disconnector of claim 7, further comprising a pressure plate having one end connected to the positive pole of the remote power supply and the other end connected to a parallel connection point of the remote interface and the remote interface.

Description

Operating power supply control loop of breaker/isolating switch Technical Field The invention relates to an operating power supply control loop of a breaker/isolating switch, and belongs to the technical field of GIS switching equipment. Background At present, a domestic GIS switch device (namely SF6 gas-insulated metal-enclosed switch device) manufacturer generally places a circuit breaker/isolating switch operation power supply in a control cabinet in a null manner, a control loop is shown in fig. 1, and once the circuit breaker/isolating switch needs to be opened and closed, the circuit breaker/isolating switch operation power supply needs to be opened and closed manually on site, so that the workload is large, and a large potential safety hazard exists. Along with the improvement of the intellectualization of the transformer substation, more and more customers want to reduce the field manual operation as much as possible, and the breaker/isolating switch switching is realized by controlling the GIS control cabinet in the background, so that the remote control switching breaker/isolating switch operation power supply has great practical significance. Disclosure of Invention The invention aims to provide an operating power supply control loop of a circuit breaker/isolating switch, which can realize the remote control of the on-off of the circuit breaker/isolating switch operating power supply loop, and is safe and quick. In order to achieve the above object, the present invention provides an operating power supply control circuit of a circuit breaker/disconnector, comprising: An electromagnetic contactor, wherein a normally open auxiliary contact of the electromagnetic contactor is connected in series in an operation power supply loop of the circuit breaker/isolating switch; The remote-control circuit comprises a double-position relay, wherein the double-position relay comprises a reset coil, a setting coil and a normally open auxiliary contact, a remote-control interface of a circuit breaker/isolating switch intelligent terminal and the reset coil of the double-position relay are connected in series to form a first branch, a remote-control interface of the circuit breaker/isolating switch intelligent terminal and the setting coil of the double-position relay are connected in series to form a second branch, the normally open auxiliary contact of the double-position relay and the coil of an electromagnetic contactor are connected in series to form a third branch, and the first branch, the second branch and the third branch are connected in parallel and then connected in series between the positive pole and the negative pole of a circuit breaker/isolating switch remote control power supply. The invention has the beneficial effects that the normally open auxiliary contact of the electromagnetic contactor is connected in series in an operation power supply loop of the breaker/isolating switch, a remote tapping port of the intelligent terminal of the breaker/isolating switch is connected in series with a reset coil of the double-position relay, a remote tapping port is connected in series with a setting coil of the double-position relay, the normally open auxiliary contact of the double-position relay and a coil of the electromagnetic contactor are connected in series between the positive pole and the negative pole of the remote control power supply, and the normally open auxiliary contact of the double-position relay is closed when the setting coil is electrified and disconnected when the reset coil is electrified, so that the setting coil or the reset coil of the double-position relay can be electrified by the remote control tapping command issued by the intelligent terminal, and the coil of the electromagnetic contactor is electrified or powered off by the tapping of the normally open auxiliary contact of the double-position relay, and finally the operation power supply loop of the breaker/isolating switch is opened by the tapping of the normally open auxiliary contact of the electromagnetic contactor; the invention can safely and rapidly remotely switch on/off the breaker/isolating switch operation power supply loop, effectively reduce the empty switch of the on-site manual operation control box under the switching-on/off working condition of the breaker/isolating switch, save the operation time, improve the working efficiency, avoid the occurrence of safety accidents and have practical significance for improving the operation safety and stability of the power equipment. Further, in the operating power supply control loop of the breaker/disconnecting switch, when the remote connection interface of the breaker/disconnecting switch intelligent terminal is closed, the setting coil of the double-position relay is powered on, so that the normally open auxiliary contact of the double-position relay is closed, the coil of the electromagnetic contactor is powered on, the normally open auxiliary contact of the elec