Compatibility between Rogowski Coil and PM5100

[Anonymous user]

#ask

This is my first post so bear with me if im doing some mistakes.

i have Schneider power meter 5100, and im planning to measure current using Rogowski Coil flexible CT

some seller said that PM5100 can't use Rogowski Coil because of compatibility issues and should use the normal CT

my question are, is it true that PM5100 can't use rogowski coil and if it's true, what type of CT are you guys recommending to me for my purpose above

thank you very much, any help is appreciated

[BevanWeiss]

This is an exchange forum, for Schneider USERS, not for Schneider technical support.  You should contact your local Schneider Technical Support representative if you require a definitive answer from Schneider.

So the main issue here will be that the PM5100 will want a CT with a appreciable full scale current to it, something like 5A.

A Rogowski Coil on its own will not provide this.  However you can get amplifiers for these coils which will convert up to a 5A full scale for the Power Meter.  If you used such an 'amplifier', or some other means, to get the full scale up to the required setting for the Power Meter then it should work fine.

[Anonymous user]

thank you for your reply

im sorry for posting in the wrong section. I have read the PM5100 specs and there's 1 / 5A in nominal current input

so if i use 1A "amplifier" for the rogowski coil, it should be working fine right ?

[BevanWeiss · Accepted solution]

Not the wrong section, but the wrong website.  'community.se.com'... it's for community exchange.  Not for 'Technical Support'.

If your amplifier complies with the other input specifications (i.e. it's ok with the input resistance of 0.3mOhm, and can provide for that burden power across the output range, then yes, it should be ok.

Typically more is better when it comes to CT currents.  You don't expect to be operating near your top end that often, so more resistance to noise at the bottom end is desirable.  More overall current = more resistance to induced noise at the bottom end.  Hence 5A CTs tend to be more common than 1A CTs.

[Anonymous user]

thanks for the reply

this is the specifications for what im planned to buy and install
based on your answer this product should be fine right ?

im planning to use 3 phase integrator 1A for the 3 rogowski coil, then the output from integrator goes to the PM5100 current input.