Means for detecting ground insulation failure for rotary...

Details Means for detecting ground insulation failure for rotary... Means for detecting ground insulation failure for rotary...

G - Physics

01

M

324/17

G01M 99/00 (2011.01) G01R 27/18 (2006.01) G01R 29/24 (2006.01) G01R 31/34 (2006.01)

Patent

CA 1038453

MEANS FOR DETECTING GROUND INSULATION FAILURE FOR ROTARY ELECTRIC MACHINES ABSTRACT OF THE DISCLOSURE Electrical potentials are induced in the rotating shaft of many rotary electrical machines because of stray flux that exists in the machines. Unless provided with adequate ground insulation to interrupt the circuit, currents can flow through the machine bearings and other parts to ground and thereby expose the machine to severe damage. The device of this invention measures the voltage across the shaft and the bearing to indicate if there is a circuit for excessive current leakage from the bearing to ground.

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