Electron_Sam78
Senior Member
- Location
- Palm Bay, FL
Hey I started troubleshooting a 3 phase, 2 HP, 200V motor on a cooling tower that had been tripping a CB. Clamp on revealed A- 58 amps, B- 58 amps, C- 2 to 4 amps. This is a 20 amp circuit. Initial resistance test phase to phase with multimeter are bouncing from single digits to the 50s. Nothing to ground. With megger it is 0.0 ohms phase to phase with 277 VDC applied on the insulation test setting. Infinity to ground using the Resistance setting. There is another motor just like it in the same tower running fine. Thoughts?