Electronic motor protection apparatus

Details Electronic motor protection apparatus Electronic motor protection apparatus

1994-12-07

1996-08-20

Williams, Howard L.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

361 25, 361 18, H02H 504

Patent

active

055484646

ABSTRACT:
A electronic motor protection system is shown having a power supply (12) usable with multivoltage supplies and providing protection from over-temperature conditions caused by various fault conditions. The system also has optional features of a time delay (20) for re-energization and for low voltage protection (22). The system is mounted on a circuit board and encased in potting material which also locks two housing parts together (30, 34). A miswiring feature is also provided to prevent connecting line voltage to the control circuit or sensor terminals.

REFERENCES:
patent: 4281358 (1981-07-01), Plouffe
patent: 4456871 (1984-06-01), Stich
patent: 4539618 (1985-09-01), Stich
patent: 4636920 (1987-01-01), Cook et al.
patent: 4851609 (1989-07-01), Reddy
patent: 5170327 (1992-12-01), Burroughs
patent: 5206572 (1993-04-01), Farag et al.
Harris Semiconductor Bulletin dated Aug. 1992 (HV-2405E).

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