The Iris Power DCR 60-2 is a simple off-line DC tester to identify problems in the stator ground wall insulation system of generators and motors before an unexpected in-service failure occurs. Unlike the pass or fail of a DC or AC hi-pot test, the DC ramp test gives diagnostic information and can be stopped before a failure occurs.
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Unlike a stepped voltage test, the ramped voltage test enables the user to separate the polarization and capacitive current components from the leakage current so that small insulation defects can be easily found. A single-phase test usually takes less than an hour to perform and can be done by one person. The DCR 60-2 tests according to IEEE Standard 95-2002. In manual mode, the DCR60-2 can also perform the “uniform time” and “graded time” voltage step DC tests, according to IEEE standard 95-2002.
The DC Ramp Test method has been proven in use by the US Bureau of Reclamation and others on a wide variety of machines with asphalt, polyester and epoxy-mica insulations.
Test curves are captured on a PC to allow easy comparison to similar machines or past results.
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