Overvoltage protective circuit

Details Overvoltage protective circuit Overvoltage protective circuit

1988-09-02

1989-08-22

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361 8, 361 13, 361 16, 361118, 361127, 361129, 361130, H02H 104

Patent

active

048601560

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 intended to be utilized for overvoltage protection of series capacitors.

REFERENCES:
patent: 2862152 (1958-11-01), Ryden
patent: 4198668 (1980-04-01), Bergdahl et al.
patent: 4625254 (1986-11-01), Fahlen

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