Circuit breaker overcurrent setting system

Abstract

The invention discloses a circuit breaker overcurrent setting system which comprises a computer, a constant current source, a circuit breaker, a current transmitter, an analog input module and a display. The computer is provided with a current processing unit, a timer and a control unit. The constant current source provides equivalent overcurrent for the circuit breaker, and the circuit breaker conducts collection and modulation on overcurrent in a loop and outputs the overcurrent to the analog input module. The current processing unit in the computer outputs a current value collected by the analog input module to the control unit and the display in the computer, the timer in the computer outputs electrification time collected by the analog input module to the control unit and the display in the computer, and the control unit outputs start and stop control signals which are judged and processed to the constant current source. By means of the system, real-time automatic setting operation of the circuit breaker overcurrnet is achieved, setting accuracy is high, setting rate is high, and the system has remarkable practical value.

Description

technical field [0001] The invention relates to a circuit breaker overload current setting system, which belongs to the technical field of circuit breaker control. Background technique [0002] The circuit breaker overload current setting process is to give an equivalent overload current to the circuit breaker, and the overload current will be stopped if the circuit breaker trips within the specified action time. In the prior art, the online automatic setting of the equivalent overload current corresponding to circuit breakers of different specifications cannot be realized, the overload current cannot be automatically set, the overload current cannot be automatically stopped, and the overload current of the given overload current cannot be automatically recorded. power on time. [0003] At present, the method for setting the overload current of a circuit breaker is usually a manual operation method, manually starting the energizing device, manually setting the setting curre...

AI Technical Summary

Problems solved by technology

This method of completing the circuit breaker overload current setting by manual operation has defects such as slow setting speed, low precision, and inability to complete the setting process quickly in real time.

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