Title :
Investigation of technology for developing large capacity and compact size GCB
Author :
Mori, T. ; Ohashi, H. ; Mizoguchi, H. ; Suzu, K.
Author_Institution :
Toshiba Corp., Kawasaki, Japan
fDate :
4/1/1997 12:00:00 AM
Abstract :
New effective technologies to increase the interruption capacity and to the reduce size of a gas-insulated circuit breaker (GCB) are shown. One is the adoption of a new nozzle shape that improves the cooling of the arc. The other is the investigation of hot gas diffusion in the exhaust cylinder related to the dielectric strength recovery after the current interruption. It is shown that these technologies are useful for increasing the interrupting current from 50 kA to 63 kA
Keywords :
circuit-breaking arcs; electric breakdown; electric strength; gas blast circuit breakers; interrupters; nozzles; switchgear testing; 50 to 63 kA; arc cooling; compact size; current interruption; dielectric strength recovery; exhaust cylinder; gas-insulated circuit breaker; hot gas diffusion; interruption capacity; nozzle shape; Circuit breakers; Circuit faults; Cities and towns; Cooling; Demand forecasting; Dielectric breakdown; Fluctuations; Shape; Substations; Voltage;
Journal_Title :
Power Delivery, IEEE Transactions on
