Maryland Cherokee Club
11-29-2012, 12:30 PM
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Any electricians that deal with 480V 3 phase power?
Normally, where I work, if you measure power at 480 to ground you should get 270. Measuring phase to phase you should get 480.
Measuring between phases I am getting 480 but here is what I get when I measure to ground.
L1 to ground measuring 480
L2 to ground measuring 0
L3 to ground measuring 480
Normally, where I work, if you measure power at 480 to ground you should get 270. Measuring phase to phase you should get 480.
Measuring between phases I am getting 480 but here is what I get when I measure to ground.
L1 to ground measuring 480
L2 to ground measuring 0
L3 to ground measuring 480
11-29-2012, 12:34 PM
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11-29-2012, 12:35 PM
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11-29-2012, 12:38 PM
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Originally Posted by brian0128
Any electricians that deal with 480V 3 phase power?
Normally, where I work, if you measure power at 480 to ground you should get 270. Measuring phase to phase you should get 480.
Measuring between phases I am getting 480 but here is what I get when I measure to ground.
L1 to ground measuring 480
L2 to ground measuring 0
L3 to ground measuring 480
Normally, where I work, if you measure power at 480 to ground you should get 270. Measuring phase to phase you should get 480.
Measuring between phases I am getting 480 but here is what I get when I measure to ground.
L1 to ground measuring 480
L2 to ground measuring 0
L3 to ground measuring 480
Your B phase might be grounded.
Last edited by wormdrink; 11-29-2012 at 12:41 PM.
11-29-2012, 12:48 PM
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11-29-2012, 12:49 PM
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A generator for an x-ray machine. I'm searching on the internet and it sounds like I have a Delta configuration at the transformer. What I can't figure out is what readings I should be seeing on my meter when I measure.
Our facilities guy sent me an email saying:
The 480 volt in question is a Delta configuration and not a Y which mean the center (B) phase is a ground or neutral depending on how you look at it, so what you would have L1-L2 = 480, L1-L3 =480 and L2-L3 =480v. but to ground you would read the following L1(A phase)-Grnd = 480v, L2 (B phase) - Grnd = 0 and L3 C phase-Grnd = 480v. Also our 480v is three wire with a ground and no neutral.
Last edited by brian0128; 11-29-2012 at 12:52 PM.
11-29-2012, 02:17 PM
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Got the last coat on the oil pan, going to do the rear main with my dad and hopefully get it all back together tonight.
11-29-2012, 04:40 PM
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I really need to get the heat fixed in the blue XJ....I want to drive with the LSD in the snow instead of the open diff in the white one....