Overvoltage protector

Details Overvoltage protector Overvoltage protector

1995-07-24

1997-05-20

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

361 56, 361111, 361119, H02H 320

Patent

active

056317972

ABSTRACT:
An overvoltage protection circuit using a diode bridge and a thyristor. The inputs to the bridge (first and second terminals) are coupled to a telephone line to be protected. The positive output of the bridge connects to a ground while the negative output of the bridge (intermediate node) connects through a thyristor to the ground. The thyristor is triggered into conduction when the voltage on the negative output of the bridge exceeds a reference voltage. The reference voltage is preferably the battery voltage for the telephone line.

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