Current fault detection system and method for AC controller

Details Current fault detection system and method for AC controller Current fault detection system and method for AC controller

1988-08-10

1989-10-17

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318806, 363 58, H02P 540

Patent

active

048750000

ABSTRACT:
An overcurrent protection system for AC motor control systems which provides a separate overcurrent shut down mechanism for each phase of the AC power used in an AC motor. These separate phase shutdown mechanisms provide protection for minor overcurrent conditions without shutting down the entire motor control system. The overcurrent protection system also provides a mechanical feedback apparatus for totally shutting down the motor control system only in a severe overcurrent condition.

REFERENCES:
patent: 3046412 (1962-07-01), Seike
patent: 3775651 (1973-11-01), Graf et al.
patent: 4333642 (1982-06-01), Kawada et al.
patent: 4356544 (1982-10-01), Ono et al.
patent: 4371824 (1983-02-01), Gritter
patent: 4447786 (1984-05-01), Saar et al.
patent: 4672286 (1987-06-01), Williams

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