Quick-tripping device of low-voltage circuit breaker

Abstract

The invention discloses a quick-tripping device of a low-voltage circuit breaker, shells are arranged at two sides of a module, and rotational structures are respectively arranged in the corresponding shells, and one ends of the rotational structures are provided with actuating ends which are stretched out of the shells, each shell is provided with two air flow channels which are communicated with outside, the air flow channel is internally provided with a block which can move under the action of air pressure, the two air flow channels which are arranged at two sides of the rotational structures, check blocks are arranged on the rotational structures, and the two ends of an ejector rod which penetrates through the module are respectively close to the check blocks relatively. The quick-tripping device is arranged between the adjacent modules, so as to lead an operating mechanism to carry out quick reaction and cut the short-circuit current to a short circuit and produce current limit effect and improve the breaking capacity of the low-voltage circuit breaker; the modularized design is adopted to lead the modules to have interchangeability; the rotational structures and the actuating ends are adopted, a mechanical signal is transmitted by the ejector rod, thereby being convenient for transmitting N-phase signals of a four-level circuit breaker and realizing N-phase protection.

Description

technical field [0001] The invention relates to a one-pole or multi-pole low-voltage circuit breaker, in particular to a tripping device for a modular low-voltage circuit breaker with fast tripping function. Background technique [0002] The existing one-pole or multi-pole low-voltage circuit breaker includes a housing composed of a base, a base and a cover, and a one-pole or multi-pole contact device installed in the housing, an operating mechanism for closing and opening, and an electromagnetic tripping device . When the circuit breaker is overloaded by a large current, the contact head in the contact device is affected by the electromotive force, and the two are repelled to achieve the current limiting effect, and then the electromagnetic part of the electromagnetic tripping device moves quickly to break the circuit breaker. To achieve the role of protecting lines and equipment. Among them, each of the multi-poles may be impacted by the short-circuit current, so each po...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a low-voltage circuit breaker quick tripping device to solve the problems in the prior art that the breaking protection capacity of the low-voltage circuit breaker is easily saturated and the breaking grade is difficult to improve, which is applied to a 4-pole circuit breaker without affecting the contact module interchangeability

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