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Joined: Aug 2001
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In a 3 Phase service I have seen 240v between phases and a 208 to ground wild leg, What are some other combinations and where do they use the wild leg?
The Golden Rule - "The man with the gold makes the rule"
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Search for high leg (27 hits) or 4-wire delta (4 hits) at this site.
Note that “Bø” {or sometimes Cø} can also be called Stinger / Red / Orange / Purple / Power / Wild / Bastard / High Leg
Read through Scott35’s 3 Phase Delta Transformer Schematics in Technical Reference Area of this board.
Also see: home.att.net/~benmiller/elecsys.htm
Utility availability of this service type is usually limited to small, remote overhead systems.
Other non-symmetrical 3ø configurations are the corner-grounded variety.
[This message has been edited by Bjarney (edited 07-27-2002).]
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Joined: Aug 2001
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I was unable to find any data in the technical Reference area.
The Golden Rule - "The man with the gold makes the rule"
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Joined: Oct 2000
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Al,
Did you set the selection to see all topics?
We are working on a way to have them continuously visible regardless of date, but this works for now. Look at the thread in that area for Instructions if you're not sure what I mean.
Bill
Bill
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Yep, I tried that, no subjects come up.
The Golden Rule - "The man with the gold makes the rule"
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Alda,
The wild leg is ONLY useful in configurations that do not require a neutral, such as 3 phase equipment, or 240 volt loads with no neutral, otherwise you burn it up.
You ONLY have a high leg in Delta systems (open or closed) because you tap mid phase of one coil (between A and C)
That's why the Wye is the popular form today, it creates no high leg and all 3 phases are useful with the neutral.
You often see 199 volt high legs, this is from 230 volt systems. Phase to ground voltage of A or C phase X 1.732 = phase to B voltage.
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Bill
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'Wild leg' is no longer the term i like. Has you ever yelled out got the WILD LEG' in a crowded store or mall??? [This message has been edited by sparky (edited 08-02-2002).]
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Thanks for the answers, Bill great transformer drawings, but still not sure where they are used. On a 3ph system 240v between phases and measuring "120v to grd, 120v to gnd, and 208 to gnd", where would the 208v to gnd be used?
The Golden Rule - "The man with the gold makes the rule"
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Aldav53,
The high leg (208 to ground) exists as a result of the center tap, but is not used to supply loads.
Ed
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