Curious about this voltage?

[Joseph Thomas]

Neutral to A= 123volts
Neutral to B= 123volts
Neutral to C= 123volts


A-B= 215volts
B-C= 215volts
A-C= 215volts
What is this 3 phase set-up? In search for answers. Thanks

 

[Dennis Alwon]

Looks like a wye 3 phase 208/120 but the voltage is running high from the poco

 

[Hv&Lv]

Looks like a wye 3 phase 208/120 but the voltage is running high from the poco

That voltage is perfect.
equates to 124-124.5 on the singles

 

[LarryFine]

Looks like a wye 3 phase 208/120 but the voltage is running high from the poco

I wouldn't object to receiving those voltages at the service, as long as it's steady.

 

[Dennis Alwon]

That voltage is perfect.
equates to 124-124.5 on the singles

I wouldn't object to receiving those voltages at the service, as long as it's steady.

I agree. I never said that was a problem. The power company often runs higher than the standard voltages. 120 and 240 never are 120v and 240v they always run higher. That was my point

 

[infinity]

Neutral to A= 123volts
Neutral to B= 123volts
Neutral to C= 123volts


A-B= 215volts
B-C= 215volts
A-C= 215volts
What is this 3 phase set-up? In search for answers. Thanks

Are these services voltages or from the secondary of a transformer? The latter has taps that can be changed to get the voltage closer to the nominal system voltage of 208/120.

 

[Hv&Lv]

Are these services voltages or from the secondary of a transformer? The latter has taps that can be changed to get the voltage closer to the nominal system voltage of 208/120.

We generally run out regulators to about 123 with a 2 volt bandwidth.
if it is at 124 and you retap you could run the risk of being below 208 when grid loading is heavy and/or something like “CVR” is run at the POCO.

https://www.energystar.gov/sites/default/files/asset/document/Volt%20Var%20and%20CVR%20EMV%20Best%20Practice%2006-01-17clean%20-%20508%20PASSED.PDF

 

[Jraef]

120 +5% =126V, you are at 123V, well within spec.

 

[infinity]

120 +5% =126V, you are at 123V, well within spec.

We once had a transformer output that was about 126-127 volts. They made us change the taps because 127 volts was above the voltage rating of a duplex receptacle which is 125 volts.

 

[Joseph Thomas]

Are these services voltages or from the secondary of a transformer? The latter has taps that can be changed to get the voltage closer to the nominal system voltage of 208/120.

These are service voltages coming straight from overhead power company transformers to tap can.

 

[Joseph Thomas]

I am looking to replicate this service which is on an existing meat processing facility. I want to build a 800 amp overhead service, 208/120 volt WYE and am looking for recommendations about the overhead parallels. In my area the underground costs are astronomical.