ptonsparky
Tom
- Occupation
- EC - retired
Current for a DC motor is limited by winding resistance? Yes?
Locked rotor would have little or no affect on current until winding failed due to heat build up? Yes?
Two wire 48v DC motor ohms @ 1.31 via Fluke 1507. 6.10 M ohm to grnd @ 57 volt. Motor is blowing 20(original fuse), 25 & 30 amp fuses almost immediately accoridng to tech that originally tried to fix this Siren. I calculate this motor current at almost 37 amps. Am I missing something? Contactor is good and control works correctly.
2nd motor of unit works and both worked until recently.
Locked rotor would have little or no affect on current until winding failed due to heat build up? Yes?
Two wire 48v DC motor ohms @ 1.31 via Fluke 1507. 6.10 M ohm to grnd @ 57 volt. Motor is blowing 20(original fuse), 25 & 30 amp fuses almost immediately accoridng to tech that originally tried to fix this Siren. I calculate this motor current at almost 37 amps. Am I missing something? Contactor is good and control works correctly.
2nd motor of unit works and both worked until recently.