Leakage breaker

Abstract

A ground-fault circuit interrupter of a simple structure and easy to assemble and adjust, can surely make an operation check without making the size larger, and will not have a protection coil damaged even if a test button is kept pushing at the operation check test. The ground-fault circuit interrupter is provided with a test circuit 41 passing dummy leak current to a zero-phase current transformer 36 with one end wound around the zero-phase current transfer 36 and the other end connected to a main circuit 30, a leakage test switch 42 connected in the test circuit 41 and making an operation check of a ground-fault circuit interrupter by putting on and off dummy leakage current flowing in the test circuit 41, and a series switch 46 connected in series with the leakage test switch 42 and put on and off according to on / off and trip operations oft the ground- fault circuit interrupter, and it is so arranged that dummy leakage current shall not flow in the test circuit 41 when the ground-fault circuit interrupter is in the off or trip state, even if the leakage test switch 42 is operated.

Description

technical field [0001] The present invention relates to an earth leakage circuit breaker, and particularly relates to prevention of burns of a tripping coil in an operation confirmation test of an earth leakage circuit breaker. Background technique [0002] Figure 13 Shown is, for example, a plan view of an internal outline of a conventional earth leakage circuit breaker shown in Japanese Patent Application Laid-Open No. 5-342976, Figure 14 shown as shown Figure 13 A perspective view of the surrounding components of the leakage test switch of the leakage circuit breaker, Figure 15 shown as will Figure 13 The circuit diagram of the leakage circuit breaker and the connection state of the main circuit. [0003] exist Figure 13 and Figure 14 Among them, 1 is the circuit breaker case, 2 is the power supply side terminal part, 3 is the load side terminal part, 4 is the movable element, 5 is the cross bar connecting the movable element of each pole, 6 is the switch mechani...

AI Technical Summary

Problems solved by technology

[0013] The traditional leakage circuit breaker constitutes as above, the leakage test switch 10 is formed by the test button 11, the test spring 12 and the plate spring 13, when the leakage circuit breaker is in the open circuit or tripped state, the cross bar 5 rotates, and the action rod 16 causes the The moving element 14 rotates, thereby pressing the leaf spring 13, increasing the gap between the test spring 12 and the leaf spring 13, so that even if the test button 11 is pressed, the test spring 12 does not contact the leaf spring 13, so that the leakage test switch 10 remains open circuit state, but the problem is that the structure is complicated, and it is difficult to adjust the gap between the test spring 12 and the leaf spring.

[0014] In addition, in order to ensure the durability caused by repeated elastic deformation of the test spring 12, and in order to make the test spring 12 and the leaf spring 13 reliably contact, for example, the length of the arm of the test spring 12 is extended to correspond, but if it is lengthened, there is an earth leakage circuit breaker The problem of getting bigger by itself

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