High voltage transfer switch with cam controlled overlap during

Details High voltage transfer switch with cam controlled overlap during High voltage transfer switch with cam controlled overlap during

1975-10-08

1977-04-05

Scott, James R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200 18, 200144B, H01H 342, H01H 3366

Patent

active

040163857

ABSTRACT:
A transfer switch to selectively transfer an electrical load from one high voltage source to another includes a shaft connected to a handle. Spaced close to opposite ends of the shaft are two circular slotted cams. Cam followers connected to opposite ends of a follower bar are inserted in the cam slot. The follower bars connected to the cam followers are connected to vacuum interrupter contacts (mechanical vacuum relays). The transfer switch is constructed so that as the cam is rotated the contacts connecting one high voltage source to the electrical load are closed and as the cam is continued to be rotated the contactors of the previously connected high voltage supply are subsequently released.

REFERENCES:
patent: 2892047 (1959-06-01), Smith
patent: 3066208 (1962-11-01), Fannon, Jr. et al.
patent: 3307005 (1967-02-01), Babb et al.
patent: 3415957 (1968-12-01), Bleibtreu et al.
patent: 3532842 (1970-10-01), Fohrhaltz
patent: 3811022 (1974-05-01), Guidosh

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