Positive and Negative Power on PM2000 meters

[james-wood-tel]

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.

[Charles_Murison]

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

[Yut]

Is there any capacitor bank connected ?

[Charles_Murison]

Hello @james-wood-tel 

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

Charles

[sesa208600_brid]

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 · Accepted solution]

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

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

Regards, 

Ramasamy N