Development of single break 420 kV GCB

Author

Toyoda, M. ; Mizoguchi, H. ; Higashi, S. ; Ozawa, Y. ; Kobayashi, A.

Author_Institution

Toshiba Corp., Kawasaki, Japan

Volume

3

fYear

2000

fDate

23-27 Jan 2000

Firstpage

2117

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Society Winter Meeting, 2000. IEEE

Print_ISBN

0-7803-5935-6

Type

conf

DOI

10.1109/PESW.2000.847680

Filename

847680