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#213773 - 07/15/14 02:36 PM Satec power meter CT wiring
sedesigner1 Offline
Member
Registered: 04/05/13
Posts: 22
Loc: NJ
I am working on a utility project. There are 2 Satec power meters wired in parallel across 2 bus breakers. The CT wiring is current flow into the meter terminals 1, 3 & 5 (correct for Satec's). The 2 meter current output terminals both wire to a 3rd meter, which is wired backwards (current in 2, 4 & 6, out 1, 3 & 5 wired in common to ground. Any ideas for the purpose of this.
Confused in New Jersey!
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#213788 - 07/16/14 08:41 PM Re: Satec power meter CT wiring [Re: sedesigner1]
Tesla Offline
Member
Registered: 06/16/04
Posts: 1273
Loc: Sacramento, CA
In all such cases, contact the tech rep for the device.

You do want a knowledgeable answer, no?

Voltages?
Amps?
wiring diagrams?
links?
problem?

Are these meter wired as a bridge?

Are you sure it's wired backwards?

Reactive power issues?



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Tesla
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#213790 - 07/17/14 01:11 PM Re: Satec power meter CT wiring [Re: sedesigner1]
sedesigner1 Offline
Member
Registered: 04/05/13
Posts: 22
Loc: NJ
The Configuration is breaker and a half. Voltage is 69KV, CT's are 3000/5. The meters are part of a zone of protection, 2 breakers with an outgoing line between them.I have the 3-line and wiring diagrams. I contacted Satec and GE (there is also a GE D25 as part of the loop). Based on their responses, the devices are wired in reverse. I'm sending the 3-line to both GE and Satec. And yes, I don't want an "it's ok" answer. I want a knowledgeable answer so I understand how this works.
Greg
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#213810 - 07/22/14 07:05 AM Re: Satec power meter CT wiring [Re: sedesigner1]
sedesigner1 Offline
Member
Registered: 04/05/13
Posts: 22
Loc: NJ
I got an answer from the utility (one of their relay specialists) and the answer was so simple I felt dumb! The line is part of a switching station. It normally feeds another station, but could also be used as a feeder to our station. The devices are wired reversed to measure incoming power to our station.
Greg
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