Line break protection for multispeed motor

Details Line break protection for multispeed motor Line break protection for multispeed motor

H - Electricity

02

H

318/51

H02H 7/085 (2006.01)

Patent

CA 1175894

ABSTRACT Overload protection for a multispeed motor is pro- vided in the form of a plurality of line break motor protectors positioned in good heat transfer relation with the motor windings and having heating elements in circuit with the motor windings to be responsive to excessive winding current and/or excessive winding temperature to disable the windings. Certain of the line break motor protectors are operational in more than one motor speed configuration. The line break motor protectors may be of the self-resetting tempera- ture sensing variety and circuitry is included to insure that the motor does not restart until all protectors are reset subsequent to an overload condition.

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