EKM Meter v4 & Phase Rotation

General questions and discussions focused around the EKM Metering System. Discuss your meters, installations, and meter communications here.
riv
Posts: 29
Joined: Mon Apr 15, 2013 3:55 am

EKM Meter v4 & Phase Rotation

Postby riv » Mon May 21, 2018 1:53 pm

Is there any way or possibility to get phase rotation from the meter?

Thanks
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V. Rublyov

Jameson
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Joined: Fri Nov 04, 2011 7:42 pm
Location: Santa Cruz, CA
Contact:

Re: EKM Meter v4 & Phase Rotation

Postby Jameson » Mon May 21, 2018 3:22 pm

It sounds like you are asking for the order in which the sine waves of a 3-phase system line up:

As far as I know there would be no way to do this with our meters.

:geek: :idea:

Looking at it I feel like you could attempt this experiment (I have never done this).

This assumes your 3-phase system has parity power factor. It also assumes you are fine connecting your meter incorrectly for a while (watts and kWh will not be accurate during this test).


1. Connect voltage reference for line 1 to line 1.
Connect current transformer to line 1, connect the black and white wire leads from the CT to line 1 on the meter. What is your power factor on line 1?

2. Connect voltage reference for line 1 to line 1.
Connect current transformer to line 2, but connect the black and white wire leads from the CT to line 1 on the meter. What is your power factor on line 1?

3. Connect current transformer to line 3, but connect the black and white wire leads from the CT to line 1 on the meter. What is your power factor on line 1?

I cannot anticipate what the results will be to all 3 scenarios, but I would be interested in hearing what you find.
Jameson
EKM METERING
http://www.ekmmetering.com
831.425.7371

riv
Posts: 29
Joined: Mon Apr 15, 2013 3:55 am

Re: EKM Meter v4 & Phase Rotation

Postby riv » Mon May 21, 2018 10:28 pm

Small clarification - should I connect CT1/CT2/CT3 together and parallel or one at a time after L1/L2/L3 connected?
-> 2. I assume - you want me to connect L2 to L2.

I will try to perform this test late this week, with one idle meter what I have.
----
V. Rublyov

Jameson
Posts: 732
Joined: Fri Nov 04, 2011 7:42 pm
Location: Santa Cruz, CA
Contact:

Re: EKM Meter v4 & Phase Rotation

Postby Jameson » Tue May 22, 2018 9:19 am

I would only conduct the experiment with 1 voltage reference wire and 1 CT. Again, Im not sure what your results will be.

-> 2. I assume - you want me to connect L2 to L2.
Voltage reference will be on line 1, CT will be on line 2, CT wires will be going to CT1.
Jameson
EKM METERING
http://www.ekmmetering.com
831.425.7371