Protector means for electric motor

Details Protector means for electric motor Protector means for electric motor

H - Electricity

02

H

318/50

H02H 7/08 (2006.01) H02H 7/085 (2006.01)

Patent

CA 1128117

ABSTRACT OF THE DISCLOSURE A three phase motor is constructed with each of the three phase windings thereof split in half so that the motor may be selectively connected for energi- zation from either a relatively high or relatively low source. Motor protectors are provided in the form of a three pole automatic resetting overload relay means and two thermostatic switches. The heaters for the individual poles of the overload relay means are connected in series with a half section of the individual phase windings and do not have to be changed when either high or low voltage energization is selected for the motor. The thermostatic switches are embedded in two of the other three winding sections but electrically insulated from the motor winding. The control contact means of the overload relay means and the thermostatic switches are connected in series with the energizing coil of the electromagnet for the contact through which the motor is connected to its energizing source.

338301

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