10KV Delta Power Supply vs Star Connected Motor
10KV Delta Power Supply vs Star Connected Motor
(OP)
Have a plant with a incoming 10KV Delta power supply. The motor has a Wye winding connection.The difference between Delta and Wye is in the voltage between the phases and neutral. It was my understanding that if the plant provided a 10 KV Delta feed and the motor was wired for a Wye feed, that the motor would actually see a different voltage than 10 KVA. Wye also has a neutral wire while Delta does not. Any explanation of what the connection types might mean to the motor?





RE: 10KV Delta Power Supply vs Star Connected Motor
Don't worry, whether the source is star or delta connected. If the motor is 3-phase and is receiveing 3-phase power supply, it is going to work fine.
The motor may be delta connected or star connected depending on its rating. The star point in motor winding is not connected to earth.
RE: 10KV Delta Power Supply vs Star Connected Motor
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RE: 10KV Delta Power Supply vs Star Connected Motor
Electric motors are wound to operate on watever way the substation transformers are connected. There are no such a thing as motors winded for wye or delta transformers.
The only matching required is the voltage line to line and the frequency of the system.
Some motors of large size have the neutral terminals out to allow the connection of differential protection. Normally the user must specify that requirement to the motor manufacturer. The other type of six leads construction is for dual voltage possibilities ( use the connection that matches your power supply) or for wye start--delta run application.
RE: 10KV Delta Power Supply vs Star Connected Motor
RE: 10KV Delta Power Supply vs Star Connected Motor
As rraghunath said though, it has nothing to do with how the line power source is derived. That is a separate issue that is irrelevant to the motor.
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