Electronic release bracket of electronic low pressure circuit breaker

Abstract

The invention discloses an electronic release bracket of an electronic low pressure circuit breaker, the electronic release bracket is composed of U-shaped first and second brackets and at least two I-shaped third brackets which are life-and-right interconnected, a first baffle plate and a second baffle plate are connected to two sides of the three brackets respectively; the electronic release bracket with simple structure and reliable assembly can easily and flexibly reach the assembly requirement of the electronic release of tripole and quadrupole circuit breakers; a mutual inductor is completed enveloped in a mutual inductor bracket to acquire sufficient insulating strength with a main loop of the circuit breaker, thus guaranteeing electrical safety of the mutual inductor and thoroughly eradicating hidden safety hazard; parts of the electronic release can be entirely separated from the main loop of the circuit breaker in order to ensure adequate insulating property of the electronic release; and the reliable wiring and positioning inside the casing avoids the hidden safety hazard caused by the exposure of open wires.

Description

Technical field [0001] The invention relates to an electronic trip unit of an electronic low-voltage circuit breaker, and in particular to a bracket for installing the electronic trip unit. Background technique [0002] Low-voltage circuit breakers are generally commonly used for power distribution, motor protection, residual current protection and electronic circuit breakers. Electronic low-voltage circuit breakers have the functions of overload long delay, short circuit short delay, short circuit instantaneous and undervoltage protection. They are more comprehensive in function than ordinary thermal magnetic circuit breakers, and are more reliable and more reliable for distribution lines and electrical equipment. Comprehensive protection; various functions of electronic low-voltage circuit breakers are realized by electronic trippers. Electronic trippers include: transformers, circuit boards and actuators, as well as brackets that fix and connect the three. Each pole of the cir...

AI Technical Summary

Problems solved by technology

[0003] The transformers of the current electronic circuit breakers are generally directly positioned in the limit slots matched with the base, so there are many limit devices on the base that cooperate with the transformers, which complicates the base; and the transformers have no special protection , the insulation strength of the main circuit of the circuit breaker is not enough, and it is easy to burn the transformer and cause a short circuit between phases in the case of a large current of the circuit breaker; the existing wiring method is that any transformer has a lead wire connected to the circuit board, and a certain number of The connecting wires of the circuit board are exposed outside the circuit board bracket, the wiring is disturbed, and there is no positioning. The wires are easy to be damaged during assembly and are easy to touch the main circuit of the circuit breaker, which has certain potential safety hazards; the existing circuit boards are generally installed directly on the There is no reliable positioning in the bracket of the electronic release, and the insulation strength with the main circuit is not enough, so there are certain potential safety hazards

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