Device for protecting an electric power line against high transi

Details Device for protecting an electric power line against high transi Device for protecting an electric power line against high transi

1987-07-10

1988-10-11

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Transient responsive

361118, H02H 322

Patent

active

047775556

ABSTRACT:
A device for protecting a polyphase electric power line against high transient overvoltages comprises at least two stages in series, the first stage being provided with a spark-gap and a decoupling inductor and being followed by a stage having a bridge limiter including two oppositely-biased power diodes each connected in series with a high-value capacitor, a time-delay contactor being placed at the terminals of each power-diode/capacitor assembly so as to permit charging of the capacitors through a resistor and auxiliary diodes and then to permit cut-off of the bridge limiter. The protection device has only one pair of high-value capacitors each connected in common in series with one of the power diodes of each phase, an auxiliary diode being associated with each capacitor.

REFERENCES:
patent: 3173029 (1965-03-01), Nadolsky
patent: 4541030 (1985-09-01), Biegelmeier
patent: 4689713 (1987-08-01), Hourtane et al.

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