B phase
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Re: B phase
Corner grounded delta? Phase to phase voltages equal all around, phase to ground voltage is 0 on the grounded leg and equal to phase to phase voltage on the other two legs when measured to ground.
Only one voltage available from this service as opposed to the center tapped delta where phase to neutral is half the phase to phase voltage on the two legs adjacent to the neutral tap.
Corner grounded delta? Phase to phase voltages equal all around, phase to ground voltage is 0 on the grounded leg and equal to phase to phase voltage on the other two legs when measured to ground.
Only one voltage available from this service as opposed to the center tapped delta where phase to neutral is half the phase to phase voltage on the two legs adjacent to the neutral tap.
Re: B phase
Grounded B is a corner grounded delta, typically found in SE Wisconsin and parts of Ohio also other parts of country. The typical available voltage is 240V. A-B=240V, B-C=240V, A-C=240V
A-gnd=240V, C-gnd=240V, B-gnd=0V
This system "physically" looks like a single phase 120/240V system.
Circuit breakers used must be rated for 240V to ground. Typical are the SqD 'H' breakers and now you can use a 3 phase CH panel with the 3 pole breakers.
This is a system we deal with on a daily basis.
NO NO NO
Grounded B is a corner grounded delta, typically found in SE Wisconsin and parts of Ohio also other parts of country. The typical available voltage is 240V. A-B=240V, B-C=240V, A-C=240V
A-gnd=240V, C-gnd=240V, B-gnd=0V
This system "physically" looks like a single phase 120/240V system.
Circuit breakers used must be rated for 240V to ground. Typical are the SqD 'H' breakers and now you can use a 3 phase CH panel with the 3 pole breakers.
This is a system we deal with on a daily basis.
charlie
Senior Member
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- Indianapolis
Re: B phase
Our company does not offer that configuration but the electric utility next to us will use it for lift stations and small motors by installing an open delta, grounded B?. The service drop is triplex and the panelboard is 1? from its looks and uses two pole circuit breakers.
The grounded B? system is a good one if you are expecting it and do not get it confused with a 1? panelboard.
Our company does not offer that configuration but the electric utility next to us will use it for lift stations and small motors by installing an open delta, grounded B?. The service drop is triplex and the panelboard is 1? from its looks and uses two pole circuit breakers.
The grounded B? system is a good one if you are expecting it and do not get it confused with a 1? panelboard.
lady sparks lover
Senior Member
Re: B phase
This is one of my favorite types of installation to discuss, yeah what everyone else said about it being grounded in a corner ground delta situation. You can't use the B phase unless you use it in conjunction with the other phases. Otherwise it's at 0 protential. I'm sorry I missed this one!!
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