Thyristor with turn-off facility and overvoltage protection

Details Thyristor with turn-off facility and overvoltage protection Thyristor with turn-off facility and overvoltage protection

1988-12-22

1989-12-05

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

361 87, 361 13, 307570, 307633, 363 57, 357 38, H02H 320, H02H 710

Patent

active

048856576

ABSTRACT:
In a thyristor with turn-off facility (AT) and overvoltage protection, the voltage limitation is achieved by a parallel-connected controllable resistor, in particular in the form of a J-FET (JF) which is driven by an overvoltage sensor (OS).
The separation of sensor function and bypass function produce advantages for a simple and compact construction.

REFERENCES:
patent: 4319318 (1982-03-01), Rippel et al.
patent: 4502072 (1985-02-01), Herberg
patent: 4697219 (1987-09-01), Mitsuoka
patent: 4760431 (1988-07-01), Nakagawa et al.
SCR Manual, 5th Edition (1972), Issued by General Electric, pp. 156-159.

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