Surge suppression system for submersible electrical motors

Electricity: electrical systems and devices – Safety and protection of systems and devices – Motor protective condition responsive circuits

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Details

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

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