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5. 发明专利

SE426895B 未知
公开(公告)号：SE426895B
公开(公告)日：1983-02-14
申请号：SE8104184
申请日：1981-07-06
申请人： ASEA AB
发明人： LUNDQVIST B
IPC分类号： H02H7/00 , H02H7/16 , H02H9/06
摘要： A protective means for a series capacitor in a high-voltage network comprises a voltage-dependent resistor (varistor) arranged in parallel with the series capacitor, a spark gap arranged in parallel with the varistor for shunting the latter when it becomes overloaded, a current-sensing member, for example a current transformer, for sensing the current through the varistor, an energy absorption detector for sensing the temperature of the varistor, and a pulse transformer electrically or magnetically connected to the current-sensing member, for triggering the spark gap. During normal operation of the network and the series capacitor the current-sensing member is short-circuited by a normally closed switching device. This switching device is controlled by the energy absorption detector in such a way that the switching device is opened if the temperature of the varistor exceeds a predetermined level, whereby a trigger pulse, generated directly by the varistor current via the current-sensing member and the pulse transformer, may pass to the spark gap.

6. 发明专利

SE8104184L 未知
公开(公告)号：SE8104184L
公开(公告)日：1983-01-07
申请号：SE8104184
申请日：1981-07-06
申请人： ASEA AB
发明人： LUNDQVIST B
IPC分类号： H02H7/00 , H02H7/16 , H02H9/06
摘要： A protective means for a series capacitor in a high-voltage network comprises a voltage-dependent resistor (varistor) arranged in parallel with the series capacitor, a spark gap arranged in parallel with the varistor for shunting the latter when it becomes overloaded, a current-sensing member, for example a current transformer, for sensing the current through the varistor, an energy absorption detector for sensing the temperature of the varistor, and a pulse transformer electrically or magnetically connected to the current-sensing member, for triggering the spark gap. During normal operation of the network and the series capacitor the current-sensing member is short-circuited by a normally closed switching device. This switching device is controlled by the energy absorption detector in such a way that the switching device is opened if the temperature of the varistor exceeds a predetermined level, whereby a trigger pulse, generated directly by the varistor current via the current-sensing member and the pulse transformer, may pass to the spark gap.

10. 发明专利

CA928387A ARRANGEMENT FOR SUPPLYING ENERGY TO AUXILIARY DEVICE AT HIGH POTENTIAL 未知
公开(公告)号：CA928387A
公开(公告)日：1973-06-12
申请号：CA100965
申请日：1970-12-17
申请人： ASEA AB
发明人： ZINCK-PETERSEN J , LUNDQVIST B
IPC分类号： H01H33/42 , H02H1/00 , H02H1/06 , H02J9/08 , H02J13/00

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