Electricity: electrical systems and devices – Safety and protection of systems and devices – Motor protective condition responsive circuits
Patent
1988-06-02
1989-04-04
Jennings, Derek S.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Motor protective condition responsive circuits
361103, 364483, 34082506, H02H 504
Patent
active
048191183
ABSTRACT:
A bidirectional motor has two electromagnetic contactors, one for forward, the other for reverse operation. Thermal protection is provided by a thermal image generator and a thermal protection unit in each contactor operating in tandem via a bidirectional line of communication keeping the thermal images in parallelism by one active contactor "talking" to the inactive contactor, the "listener".
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Instructions for A210, A250, Size 3 or 4 Reversing Motor Controller (I. L. 15466B Model J, Westinghouse Electric Corporation Control Division, Asheville, N.C. 28813, United States of America 4-1984.
Mueller Denis A.
Saletta Gary F.
Jennings Derek S.
Lorin C. N.
Westinghouse Electric Corp.
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