Grounding current protective function module for circuit breaker

Abstract

The invention relates to a grounding current protective function module for a circuit breaker. The grounding current protective function module comprises a current transformer, an electronic circuit I, an electronic circuit II, a central processor, a parameter adjusting display circuit and an executing circuit, wherein the current transformer is used for sampling a grounding current value in a protective circuit; the current transformer is used for amplifying a weak voltage signal through a branch gear of the electronic circuit I, transmitting to the central processor, and inputting into the electronic circuit II; the electronic circuit II is used for transmitting a signal subjected to anti-interference restraining processing into the central processor; and the central processor is used for exchanging a signal with the parameter adjusting display circuit and sending an execution command to the executing circuit. Due to the adoption of a standard grounding sampling signal current transformer, the sampling signal is stable and reliable when the current passes through a conductor, and the signal sampling accuracy of an intelligent controller is increased. The sampling signal can be directly transmitted to the central the central processor, so that high stability and high universality are realized; the grounding current protective function module can be applied to various circuit breakers needing grounding protection; and a structure can be designed uniformly, so that the production cost is lowered.

Description

technical field [0001] The invention belongs to a circuit breaker component, in particular to a ground current protection function module of the circuit breaker. Background technique [0002] At present, the ground current protection of the traditional circuit breaker generally adopts the direct connection between the current transformer and the intelligent controller. The commonly used design method needs to match the ground current transformer with the controller. The ground current protection must use the intelligent controller circuit breaker, so Need trial and error, resulting in a lot of waste of design costs and design time. This also causes problems such as the single output signal of the current transformer, the simple judgment of the signal of the intelligent controller, and no display adjustment function. Contents of the invention [0003] The invention provides a grounding current protection function module of a circuit breaker which can independently realize ...

AI Technical Summary

Problems solved by technology

[0002] At present, the ground current protection of traditional circuit breakers generally adopts the direct connection between the current transformer and the intelligent controller. The commonly used design method needs to match the ground current transformer with the controller. The ground current protection must use the intelligent controller circuit breaker, so Need trial and error, resulting in a lot of design costs and waste of design time

This also causes problems such as a single output signal of the current transformer, simple signal judgment of the intelligent controller, and no display adjustment function.

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