Transfer Switch Voltage?
- Thread starter bennie
- Start date
- Status
- Location
- Illinois
- Occupation
- retired electrician
Re: Transfer Switch Voltage?
The highest distribution voltage that is in use in the area, unless you are talking about lightning.
Don
The highest distribution voltage that is in use in the area, unless you are talking about lightning.
Don
Re: Transfer Switch Voltage?
I expected more interest. so I will try and revive this topic.
Situation. 480/277 volt system.
Two power sources connected to opposite terminals of a transfer switch. Sources are naturally in phase but each phase is 180? out of syncronization.
In other words, phase A sine wave of line, is at it's peak positive value. Phase A, of generator, is at it's peak negative value.
The question is what is the maximum voltage between opposing terminals?
I expected more interest. so I will try and revive this topic.
Situation. 480/277 volt system.
Two power sources connected to opposite terminals of a transfer switch. Sources are naturally in phase but each phase is 180? out of syncronization.
In other words, phase A sine wave of line, is at it's peak positive value. Phase A, of generator, is at it's peak negative value.
The question is what is the maximum voltage between opposing terminals?
Ed MacLaren
Senior Member
Re: Transfer Switch Voltage?
Approximately 1358 volts (Peak-to-Peak)
Approximately 960 volts (Rms)
Ed
Approximately 1358 volts (Peak-to-Peak)
Approximately 960 volts (Rms)
Ed
brian john
Senior Member
- Location
- Leesburg, VA
Re: Transfer Switch Voltage?
With an ATS on a 480/277 VAC 3-phase 4 wire wye system the voltage from utility to generator under normal operation is 277 VAC. Under normal operation the generator is off line. With both sources available the maximum voltage as measured from utility to generator is 960 VAC. From any phase (utility or generator) to ground should be 277 VAC.
With an ATS on a 480/277 VAC 3-phase 4 wire wye system the voltage from utility to generator under normal operation is 277 VAC. Under normal operation the generator is off line. With both sources available the maximum voltage as measured from utility to generator is 960 VAC. From any phase (utility or generator) to ground should be 277 VAC.
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