A centralized anti-malfunction device for anti-short circuit breaker

Abstract

The invention discloses a centralized anti-misoperation device for an anti-short-connection circuit breaker. The device includes an anti-misoperation control box, and a DC control power supply, multiple relays, a first-level electric coder lock and a plurality of second-level electric coder locks which are integrated in the control box. The first-level electric coder lock is connected in parallelor in series with the relays to form a short connection trigger locking circuit, and the second-level electric coder locks are connected in parallel with one another and then connected in series withthe short connection trigger locking circuit for wiring. The illegal operation of short-connecting a five-prevention electric coder lock with a circuit breaker directly by a 'wire' can be prevented. The occurrence of circuit breaker misoperation without 'five-prevention' logic judgment can be avoided. Any circuit breaker operation must be carried out in strict accordance with the preset 'five-prevention' logic steps in order to be unlocked. The defects of the 'five-prevention' system are solved completely.

Description

technical field [0001] The invention relates to the field of power grids, in particular to a centralized error prevention device for short circuit breakers. Background technique [0002] In the existing technology, in order to ensure the safe operation of the power grid, one of the important measures for substations is the operation risk management and control of substation equipment. Whether this measure is available and perfect is directly related to the safe operation of substation equipment. Since many "five-proof electric coded locks" and circuit breakers of many five-proof manufacturers do not have the anti-short-circuit operation locking function, sometimes human misuse of "conductors" to short-circuit "five-proof electric coded locks" or circuit breakers forcibly operate , It will lead to misconnection and misopening of the circuit breaker, causing personal and equipment accidents. The main factors are as follows: [0003] Substation maintenance personnel need to o...

AI Technical Summary

Problems solved by technology

Frequent self-made interval operation by mistake, accidental closing of circuit breaker with ground wire (ground knife), wrong opening of circuit breaker with heavy load, wrong closing of live line or equipment, etc.

Images