Line break protection for multispeed motor

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

1981-07-29

1983-05-17

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

318782, 318783, 318775, 318334, 361 27, 361 32, H02H 7085

Patent

active

043843123

ABSTRACT:
Overload protection for a multispeed motor is provided 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 temperature sensing variety and circuitry is included to insure that the motor does not restart until all protectors are reset subsequent to an overload condition.

REFERENCES:
patent: 2304599 (1942-12-01), Rigby
patent: 2689933 (1954-09-01), Veinott
patent: 2734158 (1956-02-01), Seely
patent: 2752548 (1956-06-01), Seely
patent: 2967269 (1961-01-01), Vaughan
patent: 2972708 (1961-02-01), Schaefer
patent: 2986685 (1961-05-01), Epstein
patent: 3167699 (1965-01-01), Renaud
patent: 3821602 (1974-06-01), Linkous
patent: 3978382 (1976-08-01), Pfarrer et al.
patent: 4082989 (1978-04-01), Pfarrer
patent: 4263540 (1981-04-01), Brandt et al.
patent: 4341987 (1982-07-01), Fisher

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