Overvoltage protection device

Details Overvoltage protection device Overvoltage protection device

1991-07-12

1993-08-03

DeBoer, Todd E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361 91, H02H 904

Patent

active

052334970

ABSTRACT:
A protection device against overvoltages liable to occur between two supply terminals (A, B) comprises between the terminals, on the one hand, a thyristor (Th) and, on the other hand, first and second zener diodes in series. The anode of the first diode (D1) is connected to the cathode of the thyristor and the cathode of the second diode (D2) is connected to the anode of the thyristor, and a third zener diode (D3) is placed between the thyristor gate and the junction (10) of the first and second diodes. The third diode has an avalanche voltage higher than that of the first diode.

REFERENCES:
patent: 4280161 (1981-07-01), Kuhn et al.
patent: 4322767 (1982-03-01), El Hamamasy et al.

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