Overvoltage protection for low resistance motor windings

Details Overvoltage protection for low resistance motor windings Overvoltage protection for low resistance motor windings

H - Electricity

02

H

318/67

H02H 7/085 (2006.01)

Patent

CA 1194923

A B S T R A C T A low winding resistance protective system for electrical motors comprising sensing apparatus for coupling to at least one motor winding and for comparing the winding resistance of a motor when at rest to a predetermined threshold and for providing an output indication in response to exceedance of that threshold and decoup1ing apparatus for decoupling the at least one motor winding from the sensing apparatus such that high voltages applied to the at least one motor winding during operation of the motor are prevented from reaching the sensing apparatus. An embodiment particularly suitable for use with high voltage motors is also described.

417288

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