Circuit breaker status monitoring device

Abstract

A circuit breaker state monitoring device provided by the present invention comprises a fault alarm contact and a state monitoring unit comprising a first sensor, a controller and a communication interface, wherein when a fault current occurs in a main loop of a circuit breaker to cause the circuit breaker to trip, the position of the fault alarm contact changes, the first sensor senses the changed position of the fault alarm contact, the controller monitors the fault trip state of the circuit breaker based on the position sensed by the first sensor, and the information correlated with the fault trip state is transmitted out via the communication interface.

Description

technical field [0001] The invention relates to the field of electric circuits, in particular to a circuit breaker state monitoring device. Background technique [0002] In most cases, due to the relatively large current or relatively high voltage of the main contacts in the circuit breaker, the closing and opening states of the main contacts cannot be directly monitored. Generally, an auxiliary contact needs to be assembled on the outside of the circuit breaker to monitor the closing and opening status of the main contact; and a fault alarm contact needs to be assembled on the outside of the circuit breaker to monitor the tripping state of the circuit breaker due to a fault , where the fault alarm contact will only act when the circuit breaker trips due to a fault. [0003] The working principle of the current auxiliary contact is: the handle of the auxiliary contact is linked with the handle of the circuit breaker; when the circuit breaker is closed or opened, the handle ...

AI Technical Summary

Problems solved by technology

[0005] It can be seen that the current auxiliary contacts and / or fault alarm contacts use the principle of mechanical transmission contact to monitor the state of the circuit breaker, occupying a large space, complex structure, and high cost

Images