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Positive and Negative Power on PM2000 meters

Metering & Power Quality

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Solved
james-wood-tel
Crewman Crewman
Crewman
0 Likes
5
474

Positive and Negative Power on PM2000 meters

Hi, Can anyone explain why we are getting the Power Tot jumping between positive to a negative value. Meters used are PM2000 so cannot see how it could be wired incorrectly.

We are getting accumulated energy delivered and received even though there is no energy generation.

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Accepted Solutions
Ramasamy_N
Commander Commander
Commander

Re: Positive and Negative Power on PM2000 meters

Hi @james

 

The PM2200R references must follow the LVCT setup (CT placement and phase sequence)  as specified in the user manual. This seems to be the mismatch of CT placement and sensor selection i

 

Capture.JPG

Please check the CT input sequence in the panel and configured sensor type in meter setup page. 

 

Regards, 

Ramasamy N

See Answer In Context

5 Replies 5
Charles_Murison
Picard Picard
Picard
0 Likes
0
466

Re: Positive and Negative Power on PM2000 meters

Hello @james-wood-tel ,

 

I am not a PM2000 expert but with meters I work with the first question I would have is what is the CT ratio? The PM2000 has measurement range of 5 mA to 6 A, Another question I would have is what is the ratings of the CTs, on many CTs, there is a minimum current required before the becomes accurate. On many CT's this is around 10% of primary rating. For example a 500:5 CT may need 50 amps on primary side (500mA secondary) before accurate which is much higher than the minimum current required for the meter.

 

Charles

 

L4 Prime for Advanced metering and Utilities
Yut
Captain
Captain
0 Likes
0
457

Re: Positive and Negative Power on PM2000 meters

Is there any capacitor bank connected ?

Charles_Murison
Picard Picard
Picard
0 Likes
1
449

Re: Positive and Negative Power on PM2000 meters

Hello @james-wood-tel 

 

Did you ever get a chance to look into the CT ratio? CT Primary and CT secondary information. 

 

Charles

 

L4 Prime for Advanced metering and Utilities
sesa208600_brid
Ensign Ensign
Ensign
0 Likes
0
443

Re: Positive and Negative Power on PM2000 meters

Hi James,

 

Can you check the kW per each phase, are these all displaying negative kW or is it just on a specific phase?

 

Regards,

zoltan

Ramasamy_N
Commander Commander
Commander

Re: Positive and Negative Power on PM2000 meters

Hi @james

 

The PM2200R references must follow the LVCT setup (CT placement and phase sequence)  as specified in the user manual. This seems to be the mismatch of CT placement and sensor selection i

 

Capture.JPG

Please check the CT input sequence in the panel and configured sensor type in meter setup page. 

 

Regards, 

Ramasamy N