CN212514909U

CN212514909U - Inspection circuit of handcart-type heavy current combined floodgate circuit breaker

Info

Publication number: CN212514909U
Application number: CN202021041196.6U
Authority: CN
Inventors: 张萍; 管宇; 王海峰; 张海涛
Original assignee: Nissin Hengtong Electric Co Ltd
Current assignee: Nissin Hengtong Electric Co Ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-02-09
Anticipated expiration: 2030-06-05

Abstract

The utility model discloses a handcart-type heavy current combined floodgate circuit breaker's inspection circuit, including control switch SA, trip coil TQ, normally open auxiliary contact QF1, combined floodgate contactor coil HC, little disconnection 3ZK, 1 a little disconnection 1ZK, 2 a little disconnection 1ZK and a little disconnection 2ZK of switch, 1 a little disconnection 1 ZK's input power terminal + KM input. The test circuit of the handcart type heavy current closing circuit breaker realizes the access and output control of the contactor by controlling the on-off of the miniature circuit breaker; the circuit breaker is checked without a universal meter, and the circuit breaker is effectively checked correctly by simply switching the external contactor and displaying the states of the indicator lamp ZD1, the indicator lamp ZD2, the indicator lamp ZD3 and the indicator lamp ZD 4; the whole structure is simple, the interchangeability is strong, the working efficiency is high-efficient, safe and stable, and manpower and material resources are saved.

Description

Inspection circuit of handcart-type heavy current combined floodgate circuit breaker

Technical Field

The utility model relates to an indoor 3-35KV medium voltage distribution technical field specifically is a handcart-type heavy current combined floodgate circuit breaker's inspection circuit.

Background

At present, in handcart-type heavy current combined floodgate circuit breaker's inspection process, 1, to the combined floodgate contactor device that the user needs in the circuit breaker with not install in the circuit breaker, have two kinds of inspection circuits, the main difference lies in: the secondary plug-in unit of the circuit breaker is connected or not connected with a contactor of a wiring circuit, so that the wiring of the contactor in the butted secondary plug-in unit is frequently replaced; 2. for the states of the auxiliary contacts in the circuit breaker and the contacts at the handcart position, the inspection personnel manually check one by one through a multimeter. The disadvantages are as follows: the operation of the inspection work is complicated, the inspection efficiency is low, the operation is easy to make mistakes, and the inspection accuracy is low.

Based on the problems, the inspection circuit of the handcart type high-current closing circuit breaker is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a handcart-type heavy current combined floodgate circuit breaker's inspection circuit has simple structure, and interchangeability is strong, and work efficiency is high-efficient, safety, stable, the advantage of using manpower sparingly and material resources, has solved the complicated inspection efficiency of current inspection work operation among the prior art and has hanged down, and the operation is easily made mistakes, and the problem of inspection correct rate is low.

In order to achieve the above object, the utility model provides a following technical scheme: a handcart type high-current closing circuit breaker inspection circuit comprises a control switch SA, a trip coil TQ, a normally open auxiliary contact QF1, a closing contactor coil HC, a micro-break switch 3ZK, a 1 # micro-break switch 1ZK, a 2 # micro-break switch 1ZK and a micro-break switch 2ZK, wherein the input end of the 1 # micro-break switch 1ZK is connected with a power supply terminal + KM input, the output end of the 1 # micro-break switch 1ZK is connected with a 1 # terminal and a 3 # terminal of the control switch SA, and is connected with the input end of an indicator lamp 1, the input end of an indicator lamp ZD2, the input end of an indicator lamp ZD3 and the input end of an indicator lamp ZD4, the 2 # terminal of the control switch SA is connected with the input end of the normally closed auxiliary contact QF2, the output end of the normally closed auxiliary contact QF2 is connected with the input end of the closing contactor coil HC, the output end of the closing contactor coil HC is connected with the input end of the micro-break switch 3Z, the output end of the No. 2 micro-disconnecting switch 1ZK is connected to a power supply terminal-KM output; the No. 4 terminal of the control switch SA is connected to the input end of a normally-open auxiliary contact QF1, the output end of the normally-open auxiliary contact QF1 is connected to the input end of a trip coil TQ, and the output end of the trip coil TQ is connected to the input end of a No. 2 micro-disconnecting switch 1 ZK; the output end of the indicator lamp ZD1, the output end of the indicator lamp ZD2, the output end of the indicator lamp ZD3 and the output end of the indicator lamp ZD4 are connected and then connected to the input end of the No. 2 micro-disconnecting switch 1 ZK; the input end of the micro disconnecting switch 2ZK is connected with the input end of a power supply terminal + HM, the output end of the micro disconnecting switch 2ZK is connected with the input end of a closing contactor coil HC, the output end of the closing contactor coil HC is connected with the input end of the micro disconnecting switch 3ZK, and the output end of the micro disconnecting switch 3ZK is connected with the output end of the power supply terminal-HM.

Preferably, the indicator light ZD1 and the 1 # micro-break switch 1ZK are indirectly provided with a normally open auxiliary contact QF 3.

Preferably, the indicator light ZD2 and the 1 # micro-break switch 1ZK are indirectly provided with a normally closed auxiliary contact QF 4.

Preferably, the indicator light ZD3 and the 1 # micro-break switch 1ZK are indirectly provided with a control switch S8.

Preferably, the indicator light ZD4 and the 1 # micro-break switch 1ZK are indirectly provided with a control switch S9

Compared with the prior art, the beneficial effects of the utility model are as follows:

the test circuit of the handcart type heavy current closing circuit breaker realizes the access and output control of the contactor by controlling the on-off of the miniature circuit breaker; the wiring of the secondary plug-in contactor is replaced at any time, when the auxiliary contact and the position contact in the circuit breaker are inspected, a universal meter is not needed for checking, the states of the auxiliary contact and the position contact of the circuit breaker are inspected through simple switching of an external contactor and the states of an indicator lamp ZD1, an indicator lamp ZD2, an indicator lamp ZD3 and an indicator lamp ZD4, and the circuit breaker is effectively inspected correctly; the whole structure is simple, the interchangeability is strong, the working efficiency is high-efficient, safe and stable, and manpower and material resources are saved.

Drawings

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

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.

Referring to fig. 1, a testing circuit of a handcart type heavy current closing circuit breaker comprises a control switch SA, a trip coil TQ, a normally open auxiliary contact QF1, a closing contactor coil HC, a micro-break switch 3ZK, a No. 1 micro-break switch 1ZK, a No. 2 micro-break switch 1ZK and a micro-break switch 2ZK, the input end of the No. 1 micro-break switch 1ZK is connected with the power supply terminal + KM input, the output end of the No. 1 micro-break switch 1ZK is connected with the No. 1 terminal and the No. 3 terminal of the control switch SA, and is connected to the input end of the pilot lamp ZD1, the input end of the pilot lamp ZD2, the input end of the pilot lamp ZD3 and the input end of the pilot lamp ZD4, there is normally closed auxiliary contact QF3 between the pilot lamp ZD1 and the 1 # slight-break switch 1ZK indirectly, there is normally closed auxiliary contact QF4 between the pilot lamp ZD2 and the 1 # slight-break switch 1ZK indirectly, there is control switch S8 between the pilot lamp ZD3 and the 1 # slight-break switch 1ZK indirectly, there is control switch S9 between the pilot lamp ZD4 and the 1 # slight-break switch 1ZK indirectly; the No. 2 terminal of the control switch SA is connected to the input end of a normally-open auxiliary contact QF2, the output end of a normally-open auxiliary contact QF2 is connected to the input end of a closing contactor coil HC, the output end of the closing contactor coil HC is connected to the input end of a micro-disconnecting switch 3ZK, the output end of the micro-disconnecting switch 3ZK is connected to the input end of a No. 2 micro-disconnecting switch 1ZK, and the output end of the No. 2 micro-disconnecting switch 1ZK is connected to a power supply terminal-KM output; the No. 4 terminal of the control switch SA is connected to the input end of a normally-open auxiliary contact QF1, the output end of the normally-open auxiliary contact QF1 is connected to the input end of a trip coil TQ, and the output end of the trip coil TQ is connected to the input end of a No. 2 micro-disconnecting switch 1 ZK; the output end of the indicator lamp ZD1, the output end of the indicator lamp ZD2, the output end of the indicator lamp ZD3 and the output end of the indicator lamp ZD4 are connected and then connected to the input end of the No. 2 micro-disconnecting switch 1 ZK; the input end of the micro disconnecting switch 2ZK is connected with the input end of a power supply terminal + HM, the output end of the micro disconnecting switch 2ZK is connected with the input end of a closing contactor coil HC, the output end of the closing contactor coil HC is connected with the input end of the micro disconnecting switch 3ZK, and the output end of the micro disconnecting switch 3ZK is connected with the output end of the power supply terminal-HM.

According to the inspection circuit of the handcart type high-current switching-on circuit breaker, a control switch SA is connected in series at the output end of a switching-on contactor coil HC, the control switch SA turns to a switching-on position, a No. 1 terminal is connected with a No. 2 terminal, and when the SA turns to a switching-off position, a No. 3 terminal is disconnected with a No. 4 terminal; the opening and closing coils are designed according to the short-circuit electrifying mode, and the current is required to be interrupted immediately after the opening and closing operation is finished, so that the output end of the closing contactor coil HC is connected in series with a normally closed auxiliary contact QF2 which is opened immediately after the circuit breaker is closed, and the output end of the tripping contactor coil TQ is connected in series with a normally open auxiliary contact QF1 which is opened immediately after the circuit breaker is opened.

When the contactor is installed in the circuit breaker, the circuit breaker is located at the test position of the handcart, the secondary plug-in unit is connected, and the No. 1 micro disconnecting switch 1ZK, the No. 2 micro disconnecting switch 1ZK, the micro disconnecting switch 2ZK and the micro disconnecting switch 3ZK are closed.

When the circuit breaker is manually switched on, the control switch SA is rotated to a switching-on position, the No. 1 terminal is communicated with the No. 2 terminal, the normally closed auxiliary contact QF2, the switching-on contactor coil HC and the micro-break switch 3ZK main contact form a passage to a negative power supply, the current flows in the switching-on contactor coil HC, the contact is closed, the switching-on coil HQ is connected, the circuit breaker is switched on, even if the No. 1 terminal and the No. 2 terminal of the control switch SA are not switched off after the circuit breaker is switched on, the No. 1 terminal and the No. 2 terminal of the circuit breaker are switched on and switched off, the switching-on current is cut off, so that the power is switched on when in short circuit, the switching-on coil is prevented from being overheated, the No. 1 terminal and the No. 2 terminal of the control switch SA are also protected from being burnt, and the normally open auxiliary contact QF1 of the circuit breaker is closed when the test position switch S8 contact is in a, Switch S8 position contacts are correctly wired.

When the manual brake separating is carried out, the control switch SA is rotated to the brake separating position, the No. 3 terminal is communicated with the No. 4 terminal, a positive power supply passes through the No. 3 terminal and the No. 4 terminal of the contact, and the QF1 and the trip coil TQ which become a normally-closed point after the circuit breaker is switched on are communicated to a negative power supply, a current passes through the trip coil TQ to trip the circuit breaker, a normally-open auxiliary contact QF1 of the circuit breaker is immediately disconnected after the circuit breaker is tripped, the current in the trip coil TQ is interrupted, the situation that the circuit is electrified in short circuit cannot be overheated is guaranteed, and the No. 3 terminal and the No. 4 terminal are protected from.

The circuit breaker is in a test position opening state at this time, the normally closed auxiliary contact QF4 contact is closed, and the test position switch S8 contact is closed, so the indicator lamp ZD2 and the indicator lamp ZD3 are on, and the wiring of the normally closed auxiliary contact QF4 and S8 position contacts is correct. The circuit breaker is placed in a working position, the working position indicates that the S9 normally closed contact is closed, and the indicator lamp ZD4 is turned on, so that the S9 position contact is correctly wired.

When the contactor is not mounted in the circuit breaker, the circuit breaker is positioned at a test position of a handcart, a secondary plug-in unit is connected, a No. 1 micro-break switch 1ZK, a No. 2 micro-break switch 1ZK and a micro-break switch 2ZK are closed, when the circuit breaker is switched on manually, a control switch SA is rotated to a switching-on position, a No. 1 terminal is connected with a No. 2 terminal, a normally-open auxiliary contact QF1, a switching-on contactor coil HC and a micro-break switch 3ZK auxiliary contact form a passage to a negative power supply, current flows in HC1, the contact is closed, a switching-on coil HQ is connected, and the circuit breaker is switched on.

In summary, the following steps: the test circuit of the handcart type heavy current closing circuit breaker realizes the access and output control of the contactor by controlling the on-off of the miniature circuit breaker; the wiring of the secondary plug-in contactor is replaced at any time, when the auxiliary contact and the position contact in the circuit breaker are inspected, a universal meter is not needed for checking, and the circuit breaker is effectively and correctly inspected through simple switching of an external contactor and display states of an indicator lamp ZD1, an indicator lamp ZD2, an indicator lamp ZD3 and an indicator lamp ZD 4; the whole structure is simple, the interchangeability is strong, the working efficiency is high-efficient, safe and stable, and manpower and material resources are saved.

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

1. The utility model provides a handcart-type heavy current combined floodgate circuit breaker's inspection circuit, includes control switch SA, trip coil TQ, normally opens auxiliary contact QF1, combined floodgate contactor coil HC, little disconnection 3ZK, 1 a little disconnection 1ZK, 2 a little disconnection 1ZK and a little disconnection 2ZK, its characterized in that: the input end of the No. 1 micro-break switch 1ZK is connected with a power supply terminal + KM input, the output end of the No. 1 micro-break switch 1ZK is connected with a No. 1 terminal and a No. 3 terminal of a control switch SA, and is connected with the input end of an indicator lamp ZD1, the input end of an indicator lamp ZD2, the input end of an indicator lamp ZD3 and the input end of an indicator lamp ZD4, the No. 2 terminal of the control switch SA is connected with the input end of a normally closed auxiliary contact QF2, the output end of the normally closed auxiliary contact QF2 is connected with the input end of a closing contactor coil HC, the output end of the closing contactor coil HC is connected with the input end of the micro-break switch 3ZK, the output end of the micro-break switch 3ZK is connected with the input end of the; the No. 4 terminal of the control switch SA is connected to the input end of a normally-open auxiliary contact QF1, the output end of the normally-open auxiliary contact QF1 is connected to the input end of a trip coil TQ, and the output end of the trip coil TQ is connected to the input end of a No. 2 micro-disconnecting switch 1 ZK; the output end of the indicator lamp ZD1, the output end of the indicator lamp ZD2, the output end of the indicator lamp ZD3 and the output end of the indicator lamp ZD4 are connected and then connected to the input end of the No. 2 micro-disconnecting switch 1 ZK; the input end of the micro disconnecting switch 2ZK is connected with the input end of a power supply terminal + HM, the output end of the micro disconnecting switch 2ZK is connected with the input end of a closing contactor coil HC, the output end of the closing contactor coil HC is connected with the input end of the micro disconnecting switch 3ZK, and the output end of the micro disconnecting switch 3ZK is connected with the output end of the power supply terminal-HM.

2. The inspection circuit of the handcart type high-current closing circuit breaker according to claim 1, is characterized in that: and a normally closed auxiliary contact QF3 is indirectly connected with the indicator lamp ZD1 and the No. 1 micro-break switch 1 ZK.

3. The inspection circuit of the handcart type high-current closing circuit breaker according to claim 1, is characterized in that: and a normally closed auxiliary contact QF4 is indirectly connected with the indicator lamp ZD2 and the No. 1 micro-break switch 1 ZK.

4. The inspection circuit of the handcart type high-current closing circuit breaker according to claim 1, is characterized in that: and a control switch S8 is indirectly arranged between the indicator lamp ZD3 and the No. 1 micro-break switch 1 ZK.

5. The inspection circuit of the handcart type high-current closing circuit breaker according to claim 1, is characterized in that: and a control switch S9 is indirectly arranged between the indicator lamp ZD4 and the No. 1 micro-break switch 1 ZK.