Transformer overload and fault protection apparatus

Details Transformer overload and fault protection apparatus Transformer overload and fault protection apparatus

1988-11-15

1989-12-05

Broome, H.

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

Fusible element actuated

337178, H01H 8502, H01H 7110

Patent

active

048855618

ABSTRACT:
An overload and fault protector for a distribution transformer or the like is disclosed. A series-connected high range current-limiting fuse and a low range expulsion type fuse is provided with a transformer lead disconnect or ejection mechanism to insure a rapid, positive disconnect of the transformer or other power distribution circuit components. The ejection mechanism supports the transformer lead and completes the circuit to the fuse link assemblies. Upon separation of the fuse link, the ejection mechanism operates to quickly disconnect the transformer lead minimizing voltage stress on the fuse assembly and providing visible indication of a blown fuse.

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patent: 4450425 (1984-05-01), Manning

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