PM5320 Total Power Factor displayed wrong

[BZsala]

We have a PM5320 and the total power factor is displayed incorrectly.

Please help what to do.

[Jesus_Diaz]

Hi @BZsala,

I can only see one screenshot from a PAS, but it does not show the PF value. What is the PF value you are seeing, and does it match with the one shown in the meter's front panel display?

Regards,

JD

[BZsala]

You mean, these?

How can I adjust PF value metering? I am 100% this thing calculates it wrong.

[Jesus_Diaz]

Are these values in the PAS equal to the ones in the PM5320 display?

If so, what are the expected power factor values? There could be a wiring issue causing the meter to calculate it incorrectly.

[BZsala]

Yes it is the same.

We have a Masterpact switch on the same line, which is showing the correct value (~0.95)

Maybe the ratio of the current measuring transformer is not correct? Or the current inputs I+ and I- on the device is wired backwards?

[Charles_Murison · Accepted solution]

Hello @BZsala ,

The ratio inside the meter would not affect power factor readings. However incorrect connections will affect power factor readings. The power factors values shown would strongly suggest that the CTs phases do not match the voltage phases.

Regards,

Charles

[BZsala]

Ok, Thanks Charles!

So we have to figure out the correct phase order on the voltage connections if I understand correctly. Can it be adjusted in sw somehow, or we need to do it manually on the connections?

[Charles_Murison · Accepted solution]

Hello @BZsala ,

Requires manual correction. Cannot be done in meter configuration.

Regards,

Charles

[BZsala]

Thanks Charles!

The solution was to correct the phase order for the PM5320!