Title :
Development of single break 420 kV GCB
Author :
Toyoda, M. ; Mizoguchi, H. ; Higashi, S. ; Ozawa, Y. ; Kobayashi, A.
Author_Institution :
Toshiba Corp., Kawasaki, Japan
Abstract :
A 420 kV-63 kA single break gas circuit breaker (GCB) has been developed. The authors show the steps to develop new interrupting chambers and circuit breakers by using various techniques. At first two interrupting chamber models are considered and investigated. According to the test results, the basic dimensions of the interrupting chamber for development purposes are determined. Pre-series CBs are manufactured, confirming that the breaker can produce a pressure rise in the puffer cylinder (ΔP) as predicted by calculation and can interrupt short line fault (SLF) currents. The driving energy is confirmed to be sufficient by conducting asymmetrical 100% bus terminal fault (T100a) current interruption tests. A GIS layout with the above-mentioned single break GCB can reduce the installation area by half, compared with the existing two break GCB
Keywords :
fault currents; gas blast circuit breakers; gas insulated switchgear; interrupters; pressure measurement; switchgear testing; 420 kV; 63 kA; GIS; IEC; asymmetrical bus terminal fault current interruption tests; installation area; interrupting chambers; pressure rise; puffer cylinder; short line fault currents interruption; single break gas circuit breaker; Buildings; Circuit breakers; Circuit testing; Dielectrics; Manufacturing; Power demand; Power generation economics; Pressure measurement; Substations; Voltage;
Conference_Titel :
Power Engineering Society Winter Meeting, 2000. IEEE
Print_ISBN :
0-7803-5935-6
DOI :
10.1109/PESW.2000.847680
