Protection system for electric motors

Details Protection system for electric motors Protection system for electric motors

1980-01-17

1981-09-08

Broome, Harold

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

361 23, 318395, 318430, 318454, H02H 708, H02H 7093

Patent

active

042888280

ABSTRACT:
A solid state protection system for AC electric motors driving high inertia loads requiring long acceleration times. An electroresponsive relay (OL) is separately responsive to permissible acceleration time, circuitry (DT, DC), acceleration overload current circuitry (ACA), and to normal running overload current circuitry (ACR). Up-to-speed detector and latch circuits (USD, USL) deactivate the acceleration time circuitry and overload current circuitry, and activate the running overload current circuitry upon attainment of normal running speed by the motor. The response levels of the overload and time response circuits are individually settable.

REFERENCES:
patent: 3009067 (1961-11-01), Janeczko et al.
patent: 3633073 (1972-01-01), Day et al.
patent: 3912976 (1975-10-01), Sons et al.
patent: 3959704 (1976-05-01), McCrea
patent: 4000446 (1976-12-01), Vandevier et al.

Affiliated with

Also associated with

Rating

Protection system for electric motors does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Protection system for electric motors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Protection system for electric motors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1195549