Electric leakage breaker

Abstract

The invention provides a minitype residual current circuit breaker which does not easily display the electric leakage under colliding or oscillating during opening the handle without increasing the other parts. The minitype residual current circuit breaker comprises a retractable junction part in the insulation frame; a handle connected with the junction part and partly projecting; a switching mechanism for switching the junction part using the operation of the handle; a leakage detecting device for detecting the leakage current; an electrimagnet device for acting the plunger; a latch for being turn off the junction part when the switching mechanism applies the racking force on the junction part using the closing operation of the handle, and for being turn on when the racking force to the switching mechanism is released using the plunger; and a leakage acting device composed of a cam and a leakage display piece, wherein the cam transfers the action of the plunger to the latch and the leakage display piece is clipped with the cam, the handle, cam and arm of the switching mechanism are continuously restricted during switching the handle.

Description

technical field [0001] The present invention relates to an earth leakage circuit breaker, which is used in electric leakage detection using a zero-phase current transformer, especially in a lamp distribution board, and more specifically, relates to an electric leakage state displayed when a contact portion is disconnected due to electric leakage Leakage action device. Background technique [0002] A circuit breaker such as a circuit breaker for wiring or an earth leakage circuit breaker not only has a function of opening and closing a circuit by operating a handle provided on the circuit breaker, that is, a switch function, but also plays the following important functions, that is, Cut off the circuit in advance to prevent burning of wires or load equipment due to overcurrent flow, and electric shock or fire due to leakage current flow. As is well known, the disconnection of the circuit can be judged by the position of the handle of the circuit breaker or the leakage displa...

AI Technical Summary

Problems solved by technology

[0006] However, since the circuit breaker also has a switching function as mentioned above, in particular, it is necessary to prevent the shock or vibration caused by the opening operation from being transmitted to the overcurrent or leakage tripping element and causing unnecessary operation. , tripping by mistake

In particular, because even if a false trip occurs during the disconnection operation, it is considered that there is no direct influence on the circuit in particular, but in reality, the operation caused by this false trip causes, for example, a false response to the alarm switch of the electrical management room Useless processing, or the investigation of the leakage location where there is no leakage in the leakage error display, etc., require certain processing

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