Alarm output device for circuit breaker

Abstract

To provide an alarm output device which can flexibly cope with any of the inner and the outer attached switches attached to a circuit breaker by a sheet of plate, by improving the shape and supporting structure of an alarm output plate. The alarm output device outputs a mechanical alarm signal to an attached alarm switch interlocked with a tripping action of the circuit breaker, and makes the attached alarm switch to carry out switching action through an alarm output plate 7 assembled into an opening and closing mechanism 3. The alarm output plate 7 is formed into a shape having fork-shape leg pieces 7a, 7b extending toward the internal alarm switch 5 and the external alarm switch 6 with its tip part as a rocking fulcrum P, and operating end parts 7a-1, 7b-1 of projection shape, individually correspond to the internal and external alarm switches, are provided at the tip part of each leg piece. The rocking fulcrum is axially supported with a pivot 3g of the opening and closing mechanism, and an offset position Q offset from the fulcrum is directly insertion engaged and installed detachably with a toggle shaft of a latch which is interlocked with the releasing action of the opening and closing mechanism.

Description

technical field [0001] The invention relates to an alarm output device equipped on a circuit breaker such as an automatic circuit breaker, which is linked with a tripping action and outputs a mechanical alarm signal to an alarm switch attached to the circuit breaker. Background technique [0002] As disclosed in Patent Document 1, there is known a circuit breaker with an alarm output device. As we all know, on the above-mentioned circuit breaker, as an accessory device (option), in addition to an auxiliary switch that detects the on-off state of the circuit breaker and outputs an electrical signal to the outside, it is also equipped with an auxiliary switch that detects the tripping operation of the circuit breaker and outputs an electrical signal. The alarm switch of the electric signal corresponds to the alarm switch (attachment), and is equipped on the outer side of the frame of the switch mechanism to be linked with the stopper (latch) of the switch mechanism (when an ov...

AI Technical Summary

Problems solved by technology

In addition, in terms of operational reliability, sliding friction resistance, wear and looseness of parts are likely to occur, and in addition, due to external vibration, impact, etc., the fixing of the alarm output plate may accidentally fall off, and the attached alarm switch may malfunction. Danger

[0010] (2) Since circuit breakers have different specifications for the main spring of the switching mechanism, the insulation distance between phases, and the outer dimensions of the housing, depending on the rated voltage and current, in the traditional sliding alarm output board, it is necessary to Each frame of the circuit breaker is designed and produced separately for the alarm output board and the opening and closing mechanism part where the alarm output board is installed, which makes component management complicated

However, in order to cope with such requirements, the traditional sliding alarm output board makes the structure and shape more complicated.

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