I have a existing 3 phase roof top exhaust fan motor starter/contactor disconnect. It is a disconnect with starting contactor in it. It also has a had off auto button and light to show it is on. The hand off auto button is feed from a transformer inside the starter/contactor disconnect. They added a damper to the existing installation. Can I use the power coming off the transformer to supply power to the damper motor? The disconnect is 3 phase.
Motor starter disconect
- Thread starter arnettda
- Start date
- Status
As long as the transformer has the capacity, and the wiring and damper are protected against short circuits and overloads.
- Location
- Illinois
- Occupation
- retired electrician
Often the capacity of the transformer is too small to power other devices. If there is enough space in the starter enclosure, you can often install a larger control power transformer.
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