Electricity: electrical systems and devices – Safety and protection of systems and devices – Motor protective condition responsive circuits
Patent
1989-05-15
1990-10-30
DeBoer, Todd E.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Motor protective condition responsive circuits
361 33, 361120, 318434, H02H 906
Patent
active
049673033
ABSTRACT:
An electrically surge protected motor (13) includes a housing (14) which when in a fluid is in communication with electrical ground. The motor (13) has an end ring (17) in contact with the housing (14), stator windings (15) within the housing (14), and power wires (21) which provide electrical power to the windings (15). A surge suppressor (23) is electrically connected between each power wire (21) and the end ring (17) and includes a gas filled chamber (31) within which are spaced electrodes (27). One of the electrodes (27) is electrically connected to the power wire (21) and the other electrode (27) is electrically connected to the end ring (17). The conductivity of the gas in the chamber (31) is such that at a predetermined voltage level in the power wire (21), electrical current will be diverted from the windings (15), pass through the chamber (31) between the spaced electrodes (27), and thereafter pass to ground through the motor housing (14).
REFERENCES:
patent: 3849704 (1974-11-01), Streater
patent: 3906273 (1975-09-01), Kozlowski
patent: 3997232 (1976-12-01), Dunaway
patent: 4266260 (1981-05-01), Lange et al.
patent: 4733324 (1988-03-01), George
Deboer Todd E.
McNeil (Ohio) Corporation
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