Current surge protector for power fuses

Details Current surge protector for power fuses Current surge protector for power fuses

1987-05-14

1989-02-21

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

361111, 361118, H02H 504

Patent

active

048070823

ABSTRACT:
An apparatus for preventing operation of a full range chemically augmented electrical fuse due to induced current surges includes a low inductance device electrically connected in series between an air gap device and a first terminal of a trigger circuit for triggering exothermic material within the fuse. A second air gap device is electrically connected in series with a second low inductance device. This series connection of the second air gap device and the second low inductance device is electrically connected in parallel with a high inductance device, the parallel connected combination being connected in series with a second terminal of the trigger circuit. All of these elements are electrically connected in parallel with the main fuse element which is electrically connected in series with the protected electrical power distribution system.

REFERENCES:
patent: 3566197 (1971-02-01), Nilsson
patent: 3628092 (1971-12-01), Keto et al.
patent: 3735312 (1973-05-01), Nagel
patent: 3760227 (1973-09-01), Poindexter
patent: 4486734 (1984-12-01), Leach
patent: 4573032 (1986-02-01), Hickey

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