Electromagnetic relays

Electricity: motive power systems – Induction motor systems – Primary circuit control

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Details

318789, 361 29, H02P 142

Patent

active

044450796

ABSTRACT:
An improved electromagnetic relay having a wafer of material with positive temperature coefficient of resistivity (PTC) mounted inside the relay combines a sturdy construction with low manufacturing costs adapting the relay for use as a starting relay for electric motors of compressors. For this purpose, the magnetic members of the relay are incorporated in the electrical relay circuit and are provided with attachments for plug-on connections of the relay to circuit pins of motor-compressor units.

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patent: 3965392 (1976-06-01), Moorhead
patent: 4161681 (1979-07-01), Rathje
patent: 4234904 (1980-11-01), Fahlesson
patent: 4241370 (1980-12-01), De Filippis et al.

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