Integral intelligent moulded case circuit breaker with residual current protection action

Abstract

The invention relates to an integral intelligent moulded case circuit breaker with residual current protection action, comprising a three-phase power processing circuit, a current signal sampling circuit, a residual circuit sampling circuit, a comprehensive tripping device used as a circuit action execution mechanism, and a microprocessing controller which is used for judging operation conditionsof currents of all phases, wherein when overloading and short-circuit faults happen, a corresponding control signal is output to the tripping device, so that a product is tripped; and when a residualcurrent value meets a tripping condition, the corresponding control signal is output to the tripping device and a leakage tripping indicating device, so that the product is tripped and leakage tripping is indicated. In the integral intelligent moulded case circuit breaker, the cost is low, the corresponding speed is high, the precision is high, the rated current is adjustable, the overloading delay time is adjustable, the rated residual current is adjustable, and the residual current action time is adjustable.

Description

technical field [0001] The invention belongs to a molded case circuit breaker, in particular to a molded case circuit breaker with residual current protection action. Background technique [0002] With the in-depth development of smart grid technology transformation, people's requirements for electricity safety and intelligent control of electricity use are becoming increasingly stringent. Molded case circuit breakers with residual current protection are widely used because of their compact structure, small size, and high cost performance. At present, there are two forms of molded case circuit breakers with residual current protection action on the market: one is the split type, which is assembled from non-intelligent molded case circuit breakers or intelligent molded case circuit breakers and residual current protection modules. The volume is relatively large, the cost is high, and the installation is cumbersome; the other is an integrated type, and the product is composed ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing molded case circuit breakers with residual current protection action, such as high cost, slow response speed, low precision, non-adjustable rated current, non-adjustable overload delay time, non-adjustable rated residual current, and non-adjustable residual current action time , the present invention provides a low cost, fast corresponding speed, high precision, adjustable rated current, adjustable overload delay time, adjustable rated residual current, adjustable residual current action time integrated intelligent residual current protection action Molded case circuit breaker

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