208/230 V 3 phase wye motor - 240 V 3 phase ungrounded delta supply
- Thread starter stardust
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I do not see why not. Connecting a 208/230 rated 3Ø motor to a 240V 3Ø supply is commonplace. Being 3 wire ungrounded is of no concern regarding connection. It gets connected the same whether it is a grounded or ungrounded system. The only difference is on an ungrounded system it may continue to run while a line-to-ground fault is present on the system... which is the whole point to running an ungrounded system. The safeness is dependent on the functional status of the system's ground detector, its supervisory monitoring and expediting the repair of any fault present.
kwired
Electron manager
- Location
- NE Nebraska
What he said
just the cowboy
Inactive, Email Never Verified
- Location
- newburgh,ny
Watch if VFD
Watch if VFD
Make sure it don't have a VFD on it they don't like ungrounded systems.
Watch if VFD
Make sure it don't have a VFD on it they don't like ungrounded systems.
kwired
Electron manager
- Location
- NE Nebraska
Depends on how the front end of the drive is built. Most your off the shelf drives have surge protection that don't like going over certain volts to ground and is often around the corresponding voltage to ground on a wye system, so they don't work so well on corner ground delta either. Custom or special order drives are out there for other systems though.
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- Placerville, CA, USA
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- Retired PV System Designer
And many have instructions on how to remove or rewire the internal surge protectors to allow the unit to be used with other than a grounded wye source.
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