Overvoltage protective circuit

Details Overvoltage protective circuit Overvoltage protective circuit

H - Electricity

02

H

317/6.5

H02H 9/06 (2006.01) H02H 1/04 (2006.01) H02H 7/16 (2006.01)

Patent

CA 1310357

ABSTRACT A trigger circuit for a spark gap chain with at least two series- connected spark gaps, of which at least one is provided with at least one trigger electrode, includes a resistor chain which is connected in parallel with the spark gap chain and comprises at least two series-connected resistor groups. That of the resistor groups which is connected in parallel with the spark gap provided with a trigger electrode comprises a voltage- dependent resistor, built up of zinc oxide varistors, which is connected in series with a linear resistor. The voltage across the linear resistor is supplied to the trigger electrode of the spark gap for ignition of the spark gap when this voltage amounts to a pre-determined value. The spark gaps are primarily inten- ded to be utilized for overvoltage protection of series capa- citors.

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