Ground fault by restriking surge of SF/sub 6/ gas-insulated disconnecting switch and its synthetic tests

Journal Article · Fri Dec 31 23:00:00 EST 1982 · IEEE Trans. Power Appar. Syst.; (United States)

DOI:https://doi.org/10.1109/TPAS.1983.318019· OSTI ID:6139066

Nishiwaki, S; Haginomori, E; Kanno, Y; Sato, S; Yamashita, S; Yanabu, S

During a breaking operation of charging current with a disconnecting switch (DS) in SF/sub 6/ gas-insulated switchgear (GIS), the occurrence of a fault to ground from the DS contact by a restriking surge was reported to be observed. The flashover voltage in this case is appreciably lower than the normal withstand voltage to the ground. It has been clarified through high-speed photography with an image converter camera that the flashover is caused by a streamer generated during restriking between the DS contacts. In this respect, with the objective of confirming these phenomena in a simulated power system, two synthetic test circuits were constructed by using 550kV DS's. Verification tests were carried out to confirm the equivalence between these two test circuits. The DS's subjected to test withstood a surge voltage of 2.3pu-the maximum voltage obtained by simulating calculations of various GIS configurations.

• Research Organization: Toshiba Corporation, Kawasaki, Japan
• OSTI ID: 6139066
• Journal Information: IEEE Trans. Power Appar. Syst.; (United States), Journal Name: IEEE Trans. Power Appar. Syst.; (United States) Vol. 102:1; ISSN IEPSA
• Country of Publication: United States
• Language: English

Related Subjects

200300* -- Electric Power Engineering-- Power Transmission & Distribution-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
CABLES
CIRCUIT BREAKERS
CONDUCTOR DEVICES
CURRENTS
ELECTRIC CABLES
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRIC GROUNDS
ELECTRIC POTENTIAL
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
FLASHOVER
GAS-INSULATED CABLES
PHOTOGRAPHY
SURGES
SWITCHES
SWITCHING CIRCUITS
TESTING
ULTRAHIGH-SPEED PHOTOGRAPHY