Title :
The influence of a vacuum circuit breaker and circuit parameters on switching overvoltages generated during interruption of starting motors
Author :
Chaly, Alexy M. ; Chalaya, Alevtina T.
Author_Institution :
Tavrida Electric Ltd., Moscow, Russia
Abstract :
A computer program has been developed for simulating the voltage escalation (VE) when a vacuum circuit breaker (VCB) interrupts the starting of a motor. The influences of the vacuum circuit breaker´s high frequency (HF) interrupting capability, dielectric strength rise, cable length and also motor power, has been traced in order to produce a sort of general view of the overvoltage phenomena in actual networks. It has been discovered that HF interrupting capability is important for high-power motors connected by short cables to the VCB when B-termination of VE predominates. In the majority of practical cases, overvoltage protection is recommended for both conventional and low-surge contact materials
Keywords :
electric machine analysis computing; equivalent circuits; machine theory; motor protection; overvoltage protection; power system transients; starting; transient analysis; vacuum circuit breakers; B-termination; HF interrupting capability; cable length; circuit parameters; computer simulation; contact materials; dielectric strength rise; equivalent electric circuit; motor starting interruption; overvoltage protection; switching overvoltages; vacuum circuit breaker; voltage escalation; Cables; Circuit breakers; Circuit simulation; Computational modeling; Computer simulation; Dielectric breakdown; Frequency; Hafnium; Protection; Voltage control;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 1996. Proceedings. ISDEIV., XVIIth International Symposium on
Conference_Location :
Berkeley, CA
Print_ISBN :
0-7803-2906-6
DOI :
10.1109/DEIV.1996.545358
