The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!


2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
International Wire Colour Codes
by Texas_Ranger
Today at 08:24 AM
Son of Sparky
by HotLine1
10/20/16 07:43 PM
Speaking of Plugmold ...
by gfretwell
10/17/16 02:37 PM
Broken battery charger? Check for cobwebs!
by gfretwell
10/17/16 02:30 PM
230 or 345 kV transmission lines?
by annemarie1
10/12/16 01:23 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 11
renosteinke 6
HotLine1 6
ghost307 5
Potseal 4
Who's Online
0 registered (), 216 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#213773 - 07/15/14 02:36 PM Satec power meter CT wiring
sedesigner1 Offline

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!

#213788 - 07/16/14 08:41 PM Re: Satec power meter CT wiring [Re: sedesigner1]
Tesla Offline

Registered: 06/16/04
Posts: 1280
Loc: Sacramento, CA
In all such cases, contact the tech rep for the device.

You do want a knowledgeable answer, no?

wiring diagrams?

Are these meter wired as a bridge?

Are you sure it's wired backwards?

Reactive power issues?

#213790 - 07/17/14 01:11 PM Re: Satec power meter CT wiring [Re: sedesigner1]
sedesigner1 Offline

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.

#213810 - 07/22/14 07:05 AM Re: Satec power meter CT wiring [Re: sedesigner1]
sedesigner1 Offline

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.


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals