tmacdonald
Member
- Location
- Saginaw, MI
Hello,
I have a project that contains 3 air handlers. Each unit has a VFD that controls the motor.
Unit 1: 5 hp motor with 15A breaker ahead of the VFD
Unit 2: 5 hp motor with 15A breaker ahead of the VFD
Unit 3: 7.5 hp motor with 20A breaker ahead of the VFD
(No input line reactors or filtering has been installed on either side of the VFD).
I am getting reports that the breakers on unit 1 and 3 trip out at the same time. This problem doesn?t occur every day but they do trip at the same time of day (aoubt 6:00am).
Unit 2 does not trip.
My first thought is the utility.
Does anyone have some insight to this problem?
I have a project that contains 3 air handlers. Each unit has a VFD that controls the motor.
Unit 1: 5 hp motor with 15A breaker ahead of the VFD
Unit 2: 5 hp motor with 15A breaker ahead of the VFD
Unit 3: 7.5 hp motor with 20A breaker ahead of the VFD
(No input line reactors or filtering has been installed on either side of the VFD).
I am getting reports that the breakers on unit 1 and 3 trip out at the same time. This problem doesn?t occur every day but they do trip at the same time of day (aoubt 6:00am).
Unit 2 does not trip.
My first thought is the utility.
Does anyone have some insight to this problem?