Circuit breaker switching-off locking device

Abstract

The invention relates to a circuit breaker switching-off locking device which comprises a fixed support arranged on a circuit breaker. The fixed support is provided with at least one locking body and at least one second locking body; the first locking body and the second locking body are vertically arrayed on the fixed support; the first locking body is arranged above the second locking body and provided with at least one first lock tongue; the second locking body is provided width at least one second lock tongue; the bottom of the second lock tongue is connected with a third lock tongue; the first lock tongue comprises a first convex part and a first concave part; the second lock tongue comprises a second convex part and a second concave part; the first convex par matches with the second concave part; the first concave part matches with the second convex part; and the first lock tongue and the second lock tongue are in fan shapes and match with each other. Therefore, the first locking body and the second locking body need to be controlled by two people respectively to act jointly so that the switching-off locking requirement of a circuit breaker switching-on mechanism can be relieved and the power supplying reliability can be ensured. No mechanical interlocking is needed, the production steps are simplified, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a three-position lock device, in particular to a circuit breaker opening and locking device for accurately locking a withdrawable circuit breaker in the three positions of separation, test and connection. Background technique [0002] Existing opening and locking devices (see figure 1 ) includes a fixed bracket 10 for installation on the circuit breaker and a key lock 20 fixed on the fixed bracket 10. When the key lock 20 locks the opening button of the mechanism, the circuit breaker cannot be closed due to its own characteristics, otherwise the circuit breaker is required When switching on, use the key lock 20 to unlock the position of the locking circuit breaker mechanism, so that the circuit breaker can be switched on. [0003] In the above-mentioned existing opening and locking device, one circuit breaker can only be equipped with one opening lock, and one person can operate the opening and closing of the circuit breaker. ...

AI Technical Summary

Problems solved by technology

[0004] like figure 2 As shown, another existing opening and locking device with two sets of key locks 20 has a relatively complicated structure. The upper and lower key locks 20 need to be interlocked together with a mechanical structure 30 to achieve the functional requirements of two people's joint control.

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