FIELD: electrical engineering. SUBSTANCE: fault detector has damped-wave RF pulse-train generator; its pulses are applied to windings under test. Windings are checked for condition by comparing inductances of two of three windings by means of bridge metering circuit. Switch makes it possible to change over windings. EFFECT: simplified procedure, improved accuracy and validity of test results. 1 dwg, 1 tbl
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---|---|---|---|
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|
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0 |
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POWER SUPPLY DEVICE FOR AC TRACTION CIRCUIT | 1993 |
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0 |
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AC ELECTRIC DRIVE | 0 |
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SU1661947A1 |
Authors
Dates
1994-04-30—Published
1991-07-04—Filed