Auxiliary device for circuit breaker

Abstract

The present invention relates to a breaker including an auxiliary device, and the auxiliary device includes the following components: a yoke; a bobbin which is arranged on the yoke and comprises a hollow part; a coil which winds the bobbin and is magnetized or demagnetized with the provided electric voltage; a connecting board which is connected with the switch that connects or cuts off and provides path to the electric power source from far end; a push rod which is movably installed in the vertical direction by the thrust force of the switching device and extrudes the connecting board to facilitate the connecting board operates to the position cutting off the electric power source of the coil when the push rod is operated from the switching device to the tripping position; a movable core which is linearly installed movably with the hollow part of the bobbin and is used for moving the switching device to the tripping position with the magnetization of the coil; and a tripping lever which connects the mobile core and is used for transferring the driving force operating the switching device to the tripping position. Thereby the breaker is miniaturized and the producing cost is reduced.

Description

technical field [0001] The present invention relates to a circuit breaker, and more particularly to an accessory device for a remote trip device optionally installed in a circuit breaker, by which the circuit breaker can be miniaturized and the production cost can be reduced. Background technique [0002] In general, circuit breakers are used to protect load-side systems and people by cutting off circuits when loads and short circuits etc. occur, and are used to turn on / off electrical loads. [0003] The circuit breaker includes: a switching device installed between a power supply terminal and a load terminal for cutting off a circuit; an abnormal current detection and tripping device, in which an abnormal current is detected, and when an abnormal current (for example, ground fault current, power Shortage of current, etc.) to supply the actuation power to the switching device; the arc extinguishing unit installed near the switching device, which extinguishes the arc generate...

AI Technical Summary

Problems solved by technology

[0014] However, in the tripping device of the circuit breaker of the prior art described above, since the micro switch is used to cut off the current supplied to the coil, and the switch occupies a considerable part of the entire capacity of the auxiliary equipment, the size of the auxiliary equipment becomes large.

Therefore, it is difficult to miniaturize the circuit breaker, and the production cost of the accessory equipment and the circuit breaker also increases due to the price of the micro switch

Images