Control and protection switchgear

Abstract

The invention discloses a control and protection switching device. The control and protection switching device comprises a circuit breaker and an intelligent control device, wherein the intelligent control device is arranged on one side of the circuit breaker, the circuit breaker comprises a handle and a first trip driving mechanism, an electromagnetic tripper in the first trip driving mechanism drives the circuit breaker to be rapidly switched off when a circuit in the circuit breaker encounters a short-circuit current, so that reliable, rapid and effective short-circuit protection on the circuit breaker is achieved by the first trip driving mechanism; and the intelligent control device comprises a control assembly and a second trip driving mechanism, the control assembly drives the second trip driving mechanism to move so that the tripper is triggered to make the circuit breaker tripped and switched off when the current exceeds a set value or a voltage value exceeds or is lower than the set value, and protection on over-voltage, over-current, under-voltage and the like of the circuit breaker is achieved. Therefore, the control and protection switching device disclosed by the invention can be used for providing over-voltage, over-current and under-voltage protection for the circuit, and also can be used for providing reliable, rapid and effective short-circuit protection for the circuit.

Description

technical field [0001] The invention discloses a control and protection switch electrical appliance, which belongs to the field of low-voltage electrical appliances. Background technique [0002] In the field of low-voltage electrical appliances, the release can be mechanically connected or integrated with the circuit breaker, and is a device used to automatically disconnect the circuit breaker. The types of releases include: electromagnetic releases, thermal releases and electronic releases. The electromagnetic release can only provide short-circuit protection, has a long service life, and is less affected by the environment; the thermal release has a relatively large action error, but its performance is stable. Most of the existing circuit breakers only have electromagnetic releases and thermal releases. With the continuous development of chip integration, electronic releases are characterized by their high sensitivity, precise action, adjustable, and remote control with ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problem that the control and protection switching devices in the prior art cannot provide overload protection or cannot drive the circuit breaker to disconnect in time when a short-circuit current occurs. Control and protection switchgear for quick opening of circuit breaker in case of short circuit

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