Method of testing the windings and insulation system of a motor by applying the test voltage before completing a path to ground
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United States of America Patent
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Jul 20, 1982
Grant Date -
N/A
app pub date -
Oct 17, 1979
filing date -
Oct 17, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrically surge protected motor having a submersible housing (10) can be manufactured and tested for insulation weaknesses by first assembling the motor components in the housing (10) without completing a path to ground therethrough. Then the windings (11, 12) of the motor may be subjected to a voltage surge greater than the voltage magnitude at which the motor is to be surge protected. After completion of the test, a path to ground through an impedance device (17) which establishes the voltage magnitude at which the motor is to be protected may be completed. Several alternative grounding devices (23, 24, 25, 26 or 28) may be provided externally of the housing (10).
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