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Single phase meeter on red leg delta?

Has anyone seen a setup like this? I found a single phase meter base on a three phase red leg delta service. The meter is marked 240V 200A 3W. I am not sure if this means that it is meant for single phase or 3 phase

3 wire. It is not clearly marked as single or three phase. The two "lighting" phases are run through the meter. The high leg is connected to what would normally be the neutral connection through the meter. It doesn't go through the meter, like the neutral on a 240V three wire single phase service.

I think it will correctly read for balanced 3 phase loads, but will have significant error on single phase loads, with the error changing based on the power factor.

I haven't heard back from the power company yet, but I wanted to get some additional input here on how to proceed.

Matthew

Reply to
Matthew Beasley
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We something similar. 3 phase for residences. Yep.. They used what was called a delta breaker and the high leg passed through the meter with out any attachment. This was to feed an air conditioner. The utilities quit installing this type of service 20 years ago, at least around here. BUT there were 4 conductors, 2 of one size, one smaller, the high leg and the messenger coming into the meter. You fail to mention if this is commercial/industrial or residential. I take it you broke the seal and removed the meter. Are you sure the wire your identifying as a highleg is not actually the neutral? Unless you have a 7-9 jaw meter you have single phase 240v. On a 5 jaw meter, connecting another hot to the neutral would smoke it. Or is this a 4 jaw meter?

Reply to
SQLit

-sniped-

Agricultural

With the OK of the utility...

120V to ground, 120V to ground, 208V to ground, and 240V phase to phase all three phases.
5 jaw meter with the high leg on the center jaw. I was expecting 7 jaw.
Reply to
Matthew Beasley

Sounds like a pump application. They can be non standard looking to those of us that do not work on them every day. I have not been around this kind of pump application in 20 years. Your going to have to get answers from the utility or someone local that knows what is going on.

Reply to
SQLit

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