PM8000 CT connections

[alannavial]

I have a question about the voltage and current connections for the PM8000. The proposed configurations in the manual are as follows:

There are multiple configurations allowed however I wanted to confirm if there was a way it could be configured with 3 phase voltages and a single phase CT? This is because we typically have 3 phase Protection P Class VTs and a single Class 1 Metering CT on blue phase on most of our circuits.

I was thinking a connection such as this would be possible where L1, L2 and L3 are connected via 33kV/110V P Class VTs:

Is this configuration possible? Would we be able to measure both voltage and current harmonics as well as THD for the network based on this connection diagram? We are mostly interested in harmonics but what other characteristics can we measure using this configuration?

[Charles_Murison · Accepted solution]

Hello @alannavial ,

This configuration would not measure power or energy correctly. You could get voltage harmonics for L1,L2,L3 and current harmonics for L1, L2 and L3 current harmonics would not be available.

Regards,

Charles

[alannavial]

Thank you very much Charles for the speedy and helpful reply.