Transformer protective system

Details Transformer protective system Transformer protective system

1975-11-13

1977-01-11

Miller, J D

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With longitudinally expansible solid element

317 14R, 317 14C, 337 32, 337204, H02H 704

Patent

active

040029492

ABSTRACT:
A current limiting fuse and an oil expulsion or weak link type fuse are connected in series with each other and with a transformer primary winding and a grounded element having a part disposed adjacent one end of the expulsion fuse is arranged so that an arc drawn upon operation of the expulsion fuse is directed to the grounded element in such manner as to cause the current limiting fuse to operate and interrupt the flow of current through the primary winding. The system is applicable to single phase or multiple phase arrangements.

REFERENCES:
patent: 2337353 (1943-12-01), Smith, Jr. et al.
patent: 3179851 (1965-04-01), Smith, Jr.
patent: 3292048 (1966-12-01), Swoish et al.
patent: 3524105 (1970-08-01), Harner et al.
patent: 3588606 (1971-06-01), Ristuccia
patent: 3916259 (1975-10-01), Russell et al.
patent: 3953818 (1976-04-01), Martin et al.

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