JIA Ming-yue, GUO Fu, LIU Shu-xin, et al. Study on Low-temperature Features and Corresponding Countermeasure for LW15-252 Circuit Breaker[J]. High voltageapparatus, 2011, 47(11): 106-109.
JIA Ming-yue, GUO Fu, LIU Shu-xin, et al. Study on Low-temperature Features and Corresponding Countermeasure for LW15-252 Circuit Breaker[J]. High voltageapparatus, 2011, 47(11): 106-109. DOI: 10.13296/j.1001-1609.hva.2011.11.014.
According to the problem occurred in the operation of LW15-252 circuit breaker
this paper summarized the low-temperature features of the pneumatic operating mechanism
and studies its heat preservation measures in winter.This paper analyzed the reasons of inaccurate measurement of SF6 density when the mechanism case was in traditional heat preservation measures
and then presented a warming and heat-preserving system composed of insulating cover and semiconductor heater for the mechanism case.The application of this system verifies that this system can ensure smooth operation of the pneumatic operating mechanism of this type of circuit breakers in winter.In addition
this study may provide a reference for the operation and maintenance of other circuit breakers with pneumatic operating mechanism in winter.