H - Electricity – 02 – H
Patent
H - Electricity
02
H
323/34
H02H 3/12 (2006.01) H02H 7/08 (2006.01) H02H 11/00 (2006.01)
Patent
CA 1065403
Abstract of the Disclosure - Apparatus for the prevention of undesirable and possibly hazardous automatic application of power to a load in the event of an outage from a power source and a subsequent reapplication of power therefrom. Described is a thyristor type of circuit inter- rupter coupled into a control circuit which is operative to control the operation of a phase-controlled SCR circuit which is cyclically operative to couple power from an AC power source to a load device such as a DC motor. In the preferred embodiment, an SCR circuit interrupter is coupled into the DC supply circuit of a control cir- cuit comprising, inter alia, a pulse generator which provides trigger pulses which are applied to a pair of silicon controlled rectifiers in the phase-controlled SCR circuit.
277664
T.b. Wood's Sons Company
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