Accident overview: On January 13, 2008, 220 kilovolt of company of Jilin Changchun power supply make the same score fontal transformer substation 1 advocate change device of interface of frequency of protective distance tripping operation, because the program sends tripping operation signal by accident mussily, bring about 220 kilovolt to make the same score fontal transformer substation 1 advocate change reach Ⅰ paragraph bus is broken pressure.
Main reason: Production quality undesirable
Produce manufacturer: Equipment limited company corresponds south the Xu Jichang that make prosperous
Model: YPC-900F6
Cast carry date: In August 2007
Accident overview: On March 20, 2008, 220 kilovolt greet Ningxia halfback Electricity Supply Board water bridge transformer substation, because knife brake supports porcelain vase workmanship is undesirable rupture, mother difference protects a movement, cause complete station to break pressure.
Main reason: Workmanship undesirable
Produce manufacturer: N report porcelain works
Model: ZSW-252/4
Cast carry date: In August 1994
Accident overview: On March 21, 2008, beijing changes transformer substation of 220 kilovolt careless bridge, because assemble electric equipment (GIS) breakdown of the interior that enrage a storehouse, cause transformer substation of 220 kilovolt careless bridge complete station power cut.
Main reason: Manufacturer fails to offer effective quality to serve assure
Produce manufacturer: Limited company of switch of high pressure of Shanghai Xi Menzi
Model: 8DN9
Cast carry date: In October 2007
Accident overview: On March 21, 2008, shanghai superhigh pressure is defeated change 220 kilovolt haven transformer substation of electric company, because assemble electric equipment (GIS) production quality is undesirable attaint, cause 220 kilovolt a paragraph of generatrix halts use.
Main reason: Production quality undesirable
Produce manufacturer: Limited company of switch of high pressure of Shanghai Xi Menzi
Model: 8DN9
Cast carry date: In May 2007
Accident overview: On May 10, 2008, the net runs the country management of superhigh pressure of limited company Yichang is in 500 kilovolt appropriate to be changed shed a station, because assemble electric equipment (GIS) production quality is undesirable attaint, cause appropriate China to shed systematic pole Ⅰ to halt use continuously.
Main reason: Production quality undesirable
Produce manufacturer: New northeast is electric (Shenyang) high pressure switch limited company
Model: ELKSP3
Cast carry date: In December 2006
Accident overview: On May 20, 2008, bureau of industry of cable of Hunan Chen state transformer substation of brook of 220 kilovolt pond 1 advocate because type selecting of protector of overvoltage of lightning arrester of breaker of 10 kilovolt side is undeserved,change attaint burn down, cause advocate change halt use.
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