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  • Users: riqsoares
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  1. riqsoares

    HV motor running with low insulation

    I have in my plant a 2500 kW, 13200 V, 20 poles brushless synchronous motor. The machine was running and when it stopped i did the insulation test with 5 kV. The insulation test result was 3 MΩ. The machine is installed in sheltered place and it does not have any signs of oil, dirty or...
  2. riqsoares

    Acetylene in transformer insulation oil

    Guys, We have in our plant a 230 /13,8 kV 31 MVA transformer that had the following DGA result (in ppm): H2: 228 O2:15400 N2:74000 CH4:41 CO: 297 CO2:1570 C2H4:64 C2H6:9 C2H2:179 Total:818 After this result, we did the ultrasonic test to locate some partial discharge inside the equipment. The...

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