Breaker applied to low-voltage switch cabinets

Abstract

The invention discloses a breaker applied to low-voltage switch cabinets. The breaker comprises main contacts, release springs, a first connection rod device, a second connection rod device, a lockinghook, tripping devices and an alarm, wherein the first connection rod device and the second connection rod device are connected together through the locking hook; a release spring is arranged at thefront end of the first connection rod device; the main contacts are respectively arranged on the first connection rod device and are located between the release springs and the locking hook; the tripping devices are respectively connected with the second connection rod device and the main contacts; the alarm is also connected with the tripping devices. Through the manner, the breaker is applied toinfrequent connection-disconnection control of low-voltage power distribution circuits; alarm signals can be sent when short-circuit faults, overload faults or under-voltage faults of the circuits occur; meanwhile, the circuits can be automatically connected and disconnected; the breaker is also capable of judging phenomenon faults immediately under the condition that the light is bad; the breaker is used for achieving short-circuit, overload and under-voltage protection; the breaker is long in service life.

Description

technical field [0001] The invention relates to the field of power distribution industry, in particular to a circuit breaker for a low-voltage switch cabinet. Background technique [0002] Low-voltage circuit breakers are mainly used to protect electrical equipment in AC and DC low-voltage power grids from overcurrent, reverse current, short circuit, undervoltage and leakage and other abnormal conditions, and can also be used for infrequent starting of motors and operation or conversion circuit. A low-voltage circuit breaker generally consists of a contact system, an arc extinguishing chamber, a free tripping mechanism, an operating mechanism, an overcurrent release, an undervoltage (loss of voltage) release, a shunt release, an auxiliary contact, a housing or a frame and so on. The operating mechanism is a mechanism for closing and disconnecting the circuit breaker, in which the handle operates the mechanism. [0003] Low-voltage circuit breakers are widely used in low-v...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is to provide a circuit breaker for low-voltage switchgear, which is used for non-frequent on-off control of low-voltage power distribution circuits, and sends out alarm signals when faults such as short circuit, overload or undervoltage occur in the circuit, and at the same time automatically breaks the circuit , In the case of poor light, the circuit breaker can immediately judge the phenomenon of failure, and the circuit breaker realizes the protection of short circuit, overload and loss of voltage, and has a long service life

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