High-voltage direct current interruption devices

Details High-voltage direct current interruption devices High-voltage direct current interruption devices

H - Electricity

01

H

348/1

H01H 33/00 (2006.01) H01H 33/59 (2006.01)

Patent

CA 1110749

ABSTRACT OF THE DISCLOSURE A spark gap device in a high-voltage direct current interrupting device maintains a substantially constant ignition voltage by constructing the spark gap device in at least two series-connected main spark gaps connected in parallel with a voltage divider for distributing the voltage across the main spark gaps. An ignition voltage-determining auxiliary gap is connected in series with an impedance con- nected in parallel with one or more of the main spark gaps to effect a continued ignition thereof. The ignition voltage of the high-voltage direct current interrupting device is determined by the auxiliary gap such that the auxiliary gap is not subjected to appreciable wear whereby the variations of the ignition voltage are relatively small and not influenced by the wear of the main spark gaps. - 1 -

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