Intelligent branch boundary vacuum circuit breaker of built-in zero sequence current transformer

• Main Authors: WU SUZHEN, GUO SHULONG, ZHUANG DAHONG, GUO WEIXING, ZHUANG DAQING
• Format: Patent
• Language: Chinese; English
• Published: 18.09.2013
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE DEVICES; RELAYS; SELECTORS

The utility model relates to an intelligent branch boundary vacuum circuit breaker of a built-in zero sequence current transformer, including a circuit breaker housing and a zero sequence current transformer, wherein the circuit breaker housing is inside provided with a vacuum arc-extinguishing chamber, the top of the circuit breaker housing is provided with a voltage transformer, the vacuum arc-extinguishing chamber is connected with the zero-sequence current transformer, the bottom of the circuit breaker housing is provided with a base, one side of the bottom of the circuit breaker housing is provided with a ground terminal, and the circuit breaker housing is equipped with a switching-closing drag link mechanism. The vacuum circuit breaker is simple in structure, can output both alternate current and line zero sequence current through adding the zero sequence current transformer in the circuit breaker housing, and can effectively perform zero sequence current protection and overcurrent protection.