Electronic controllers and circuit breakers for circuit breakers

Abstract

The invention discloses an electronic controller for a circuit breaker and a circuit breaker. The electronic controller comprises a shell, an electronic control circuit and an isolation device, wherein the isolation device comprises a fixing part, a movable part, a driving part and an elastic piece, the elastic piece is arranged between the driving part and the shell, the elastic piece can drive the movable part to move to a breaking position for enabling the movable part and the fixing part to be separated, and when the driving part is fixed at the fixed position on the shell via a locking structure, the driving part can overcome the acting force of the elastic piece to enable the moving part to move to a connection place where the movable part and the fixing part are communicated. The isolation device of the electronic controller for the circuit breaker is simple in structure, and the electronic controller and high voltage of the circuit breaker can be reliably isolated in a voltage-withstanding test.

Description

technical field [0001] The invention belongs to the field of low-voltage electrical appliances, and in particular relates to an electronic controller for a circuit breaker and a circuit breaker. Background technique [0002] Circuit breakers are an important part of power distribution appliances, mainly used in industrial low-voltage power systems, used to connect and break the current in the grid circuit and protect the circuit and power supply equipment from overload, undervoltage, short circuit, single-phase grounding and other faults harm. [0003] Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. Low-voltage circuit breaker is also called automatic switch, and commonly known as "air switch" also refers to low-voltage circuit breaker. It can be used to distribute electrical energy, start asynchronous motors infrequently, and protect power lines and motors. When they have severe overload, s...

AI Technical Summary

Problems solved by technology

[0005] A circuit breaker overvoltage signal isolation device in the prior art is to add an external module outside the circuit breaker, and when receiving the overvoltage signal of the withstand voltage test or similar test, the knob is turned to the isolation position, that is, the isolation overvoltage signal, but such a design makes the structure of the circuit breaker complicated, requires a larger installation space for the circuit breaker, and is inconvenient to operate

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