Circuit breaker with electric leakage tripper

Abstract

The invention relates to a circuit breaker with an electric leakage tripper. The circuit breaker with the electric leakage tripper comprises a plurality of circuit breaker bodies, a shell part for installing the circuit breaker bodies, the tripper, a controller, a zero sequence mutual inductor, a plurality of output pole pieces and a plurality of input pole pieces. The tripper and the controller are fixed on the shell part, the input pole piece is arranged at the lower end of the shell part, and the input pole piece is provided with a communication plate, is connected with the communication plate, penetrates through the zero sequence mutual inductor and then is in contact with the circuit breaker body. The output pole piece is arranged at the upper end of the shell part. The circuit breaker body comprises a traction rod and a contact rod, the contact rod is movably connected with the output pole piece, and the traction rod is connected with the contact rod and can drive the contact rod to rotate. According to the circuit breaker with the electric leakage tripper, the zero-sequence mutual inductor generates residual current through three-wire and four-wire imbalance, and the controller controls the push rod of the tripper to act, so that the circuit breaker is opened, the problem of electric leakage of the circuit breaker is effectively solved, and the circuit breaker is simple in structure.

Description

technical field [0001] The invention relates to the field of circuit protection, in particular to a circuit breaker with a leakage release. Background technique [0002] A circuit breaker is a switching device that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time. Due to the unbalance of the three-phase four-wire circuit, there will be leakage, which will eventually cause the problem of burning the circuit breaker. When the circuit breaker has leakage, short circuit or current exceeds the set threshold of the zero-sequence transformer, the circuit breaker is set to automatically cut off the power to protect the circuit breaker. The principle is that the vector sum of the current passing through the zero-sequence current transformer is not equal to zero when the line has leakage or personal electric shock, and the voltage is generated on the two sides of the sec...

AI Technical Summary

Problems solved by technology

Its shortcoming is: the invention creates a limited number of accommodating contact rods, and does not adjust the sensitivity of the residual current, which belongs to a relatively traditional mechanical structure circuit breaker

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