CN201796825U

CN201796825U - Circuit of switching-on tripping coil of anti-burning circuit breaker

Info

Publication number: CN201796825U
Application number: CN2010205344101U
Authority: CN
Inventors: 王林松
Original assignee: Angang Steel Co Ltd
Current assignee: Angang Steel Co Ltd
Priority date: 2010-09-19
Filing date: 2010-09-19
Publication date: 2011-04-13
Anticipated expiration: 2020-09-19

Abstract

The utility model relates to a prevent burning circuit breaker combined floodgate trip coil's circuit, including combined floodgate trip coil and separating brake trip coil's action switching circuit, auxiliary switch normally closed contact is connected with combined floodgate trip coil behind the control switch, a serial communication port, parallelly connected two time delay time relay on auxiliary switch normally closed contact and combined floodgate trip coil return circuit, two time delay time relay's long time delay contact links to each other with auxiliary relay, auxiliary relay's normally closed contact is established on combined floodgate trip coil return circuit, two time delay time relay's short time delay contact is connected with microcomputer system. Compared with the prior art, the beneficial effects of the utility model are that: by improving the secondary control loop of the circuit breaker and introducing the double-delay time relay, when the fault conduction of the circuit breaker operating mechanism is overtime, the circuit breaker operating mechanism directly cuts off a closing trip coil loop, the risk of burning loss of the circuit breaker and a protection device is reduced, and the problem that the control loop of the circuit breaker is compatible with microcomputer protection is solved.

Description

A kind of circuit of anti-burning breaker closing tripping coil

Technical field

The utility model relates to primary cut-out secondary control loop field, relates in particular to a kind of circuit of anti-burning breaker closing tripping coil.

Background technology

Circuit breaker is a kind of visual plant of electric power system; people lay particular stress on the application and development to its performance more for a long time; pay close attention to not enough to the design of its secondary circuit; cause breaker reliability to descend; along with the popularizing of Microcomputer Protection, the problem of breaker control circuit and Microcomputer Protection and automation equipment compatibility is constantly come out in recent years.Comparatively commonly because the circuit breaker operation mechanism element that the circuit breaker operation mechanism fault causes; as the scaling loss of the tripping coil that closes a floodgate, contactor, relay and protective device; cause maintenance cost and maintenance workload to increase, also safe and reliable power supply is brought influence simultaneously.

See Fig. 2, when circuit breaker operation mechanism is in separating brake not during the energy storage state, travel switch CK normally closed contact is connected, K closes a switch this moment, intermediate relay ZJ 1 action, ZJ1 normal opened contact closure, ZJ2 moves thereupon, the normal opened contact closure of ZJ2, normally closed contact is opened, the motor entry into service, switching-in spring begins energy storage, if the combined floodgate tripping coil is failed energy storage and put in place, the normally closed contact of travel switch CK can not be opened, even (in the double dot dash line frame) control switch KK invests closing position in the action commutation circuit of combined floodgate tripping coil and separating brake tripping coil at this moment, combined floodgate tripping coil HQ can not move yet, and to avoid misoperation.After energy storage is finished, the normally closed contact of travel switch CK is opened, the ZJ2 outage, the motor stall is if this moment, control switch KK invested closing position, combined floodgate tripping coil HQ action, mechanism closes a floodgate, and after mechanism closed a floodgate, auxiliary switch DL normally closed contact was opened, the power supply of combined floodgate tripping coil HQ is cut off, and the breaker closing action is finished.

When day-to-day operation, find; if occurring breaker mechanism in the breaker closing process adjusts improper or for electromagnetic operating mechanism; if power switch fuse melting; situations such as cell voltage is low; though combined floodgate tripping coil HQ action; but for a certain reason; operating mechanism akinesia or move when not in place; the normally displacement of auxiliary switch DL contact that is connected with the operating mechanism power transmission shaft; cause closing circuit not to be cut off; because of most of protective devices all have self-retaining function; the The whole control loop will be in conducting state always, make the combined floodgate tripping coil HQ in the loop; relay even protective device all might burn.

Summary of the invention

The purpose of this utility model provides a kind of circuit of anti-burning breaker closing tripping coil, avoids because the circuit breaker operation mechanism fault causes breaker closing tripping coil scaling loss.

For achieving the above object, the utility model is achieved through the following technical solutions:

A kind of circuit of anti-burning breaker closing tripping coil, the action commutation circuit that comprises combined floodgate tripping coil and separating brake tripping coil, the auxiliary switch normally closed contact is connected with the combined floodgate tripping coil behind the control switch, it is characterized in that, the dual-delay time relay in parallel on auxiliary switch normally closed contact and combined floodgate tripping coil loop, the long delay contact of the dual-delay time relay links to each other with auxiliary relay, the normally closed contact of auxiliary relay is located on the combined floodgate tripping coil loop, and the short time delay contact of the dual-delay time relay is connected with microsystem.

Compared with prior art; the beneficial effects of the utility model are: by improving the circuit breaker secondary control loop; introduce the dual-delay time relay; after the circuit breaker operation mechanism fault causes the conducting of combined floodgate tripping coil overtime; send fault alarm or directly cut off combined floodgate tripping coil loop; reduce the risk of circuit breaker and protective device scaling loss, reduced the maintenance cost and the maintenance workload of equipment, solved breaker control circuit and Microcomputer Protection compatibling problem simultaneously.

Description of drawings

Fig. 1 is the utility model embodiment application circuit structural representation;

Fig. 2 is an application circuit structural representation in the prior art.

Among the figure: K-K switch K-control switch CK-travel switch DL-auxiliary switch D-motor HQ-combined floodgate tripping coil TQ-separating brake tripping coil ZJ-auxiliary relay

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described further:

See Fig. 1, it is the circuit embodiments application circuit structural representation of a kind of anti-burning breaker closing tripping coil of the utility model, in the action commutation circuit of combined floodgate tripping coil and separating brake tripping coil, dual-delay time relay sj in parallel on auxiliary switch DL normally closed contact and combined floodgate tripping coil HQ loop, the long delay contact SJ-2 of the dual-delay time relay links to each other with intermediate relay ZJ 3, the normally closed contact of intermediate relay ZJ 3 is located on the combined floodgate tripping coil loop, and the short time delay contact SJ-1 of the dual-delay time relay is connected with microsystem.

After investing closing position, control switch KK breaks down (closing not in place as operating mechanism), combined floodgate tripping coil HQ continues to keep conducting state, the dual-delay time relay sj picks up counting, when the short time delay contact SJ-1 of dual-delay time relay action, microsystem receives this signal, show fault alarm, in time handle, can cut off circuit breaker control power supply to cut away closing circuit by the operator on duty; If the operator on duty does not have enough time to handle (as situation such as unattended), the long delay contact SJ-2 action of the dual-delay time relay, intermediate relay ZJ 3 actions that triggering is attached thereto, by force closing circuit is cut off, in order to avoid combined floodgate tripping coil HQ, relay etc. burn, after the order of closing a floodgate disappeared, the normally closed contact closure of ZJ3 still can keep closing circuit complete.

Claims

1. anti-circuit that burns the breaker closing tripping coil, the action commutation circuit that comprises combined floodgate tripping coil and separating brake tripping coil, the auxiliary switch normally closed contact is connected with the combined floodgate tripping coil behind the control switch, it is characterized in that, the dual-delay time relay in parallel on auxiliary switch normally closed contact and combined floodgate tripping coil loop, the long delay contact of the dual-delay time relay links to each other with auxiliary relay, the normally closed contact of auxiliary relay is located on the combined floodgate tripping coil loop, and the short time delay contact of the dual-delay time relay is connected with microsystem.