LOW VOLTAGE APPARATUS ›› 2021, Vol. 0 ›› Issue (6): 73-78.doi: 10.16628/j.cnki.2095-8188.2021.06.013

• Detection & Experiment • Previous Articles     Next Articles

Comparative Study on AC and DC Breaking Characteristics of Moulded Case Circuit Breakers

PENG Chenyi, CHENG Shaoyong, FU Zhichao   

  1. Shanghai Electric Power Transmission & Distribution Group Technology Center,Shanghai 200042,China
  • Received:2021-03-14 Online:2021-06-30 Published:2021-10-13

Abstract:

Based on the experimental studies for the designed moulded case circuit breakers(MCCBs),this paper analyzed the short circuit breaking characteristics and the key influencing factors of AC circuits and DC circuits.It is found that the arc voltage and the recovery voltage affect the DC breaking and AC breaking respectively.The prospective breaking current and the air-blast affect both the DC breaking and the AC breaking at different degrees,and should be seriously considered in the design of MCCBs.

Key words: AC circuit breaker, DC circuit breaker, air-blast, short circuit breaking

CLC Number: