Hello all,

I am the new on Siemens forum sorry if I repeat question but I couldn’t find the answer in previous topics.

I have the problem with Total apparent power, for example my Sentron shows up following values:

TOTAL   170.6 kVA

TOTAL   153.6 kW

TOTAL   17.3 kVar

So, apparent power is the sum of active and reactive. Maybe I made mistake in parameterization or connection but if I understand good Apparent power should be S^2 = P^2 + Q^2 = 154.27 kVA

Does anyone from you had experience with this?

Thank you

ISI = SQRT [P^2 + Q^2]

ISI = SQRT [(153.6)^2 + (17.3)^2]

ISI = SQRT [23892.25]

ISI = 154.57 is correct. [Apperant power]

PISCEAN 2010

ISI = SQRT [P^2 + Q^2]

ISI = SQRT [(153.6)^2 + (17.3)^2]

ISI = SQRT [23892.25]

ISI = 154.57 is correct. [Apperant power]

 @PISCEAN 2010

Thank you I think the same like you of course. But my sentron counts 170.6 kVA. Like i posted on attached picture.

I cannot believe that Sentron doesn't now to calculate apparent power, so I guess  I made mistake somewhere in connection or parameterization...

Please check the CT connection sequence, types of connectio, voltage input, voltage transformer ration & connected CT ratio.

HTH

Hello,

 I have the same problem. Can I help me?

  Regards,