H - Electricity – 02 – P
Patent
H - Electricity
02
P
342/38
H02P 7/08 (2006.01) H02H 11/00 (2006.01)
Patent
CA 1337493
Control apparatus having two-fault tolerance for two position, motor operated actuators includes electronic circuitry for disconnection of the power return to the actuator motor armature thereby insuring that the motor will not be activated upon an inadvertent connection of power to either motor power input, and for indication of disconnection thereto. Test means determine the operational status of a motor relay and also determine inadvertent applications of power to the one of the pair of motor power inputs that is not connected to the power source through the position switch and one of the pair of limit switches. A relay and motor indicating means are operable to indicate either motor operation or inadvertent power interruptions in the one of the pair of motor power inputs most recently connected to the power source through the position switch and one of the pair of limit switches.
609512
Decarlo Joseph D.
Grant Ross M.
Swabey Ogilvy Renault
United Technologies Corporation
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