Standard CT & VT VA ratings?
Standard CT & VT VA ratings?
(OP)
I've been asked to give details for some replacement CTs and VTs for one of power stations. Are there standard VA ratings for CTs and VTs?
The existing VTs are 200VA which is well in excess of what the actual burden will be (less than 5VA) so I don't want to tell them to order direct replacments.
The existing VTs are 200VA which is well in excess of what the actual burden will be (less than 5VA) so I don't want to tell them to order direct replacments.






RE: Standard CT & VT VA ratings?
What voltage class?
RE: Standard CT & VT VA ratings?
The CTs are also IEC standard and 250A/1A & 125A/1A.
RE: Standard CT & VT VA ratings?
Figure out what you need and specify that. Over-rating the VT burden can lead to a more expense unit that will actually perform less accurately than one sized with a more appropriate burden rating.
Over-sizing the CT burden rating won't cause a performance problem, but will potentially add cost.
RE: Standard CT & VT VA ratings?
RE: Standard CT & VT VA ratings?
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RE: Standard CT & VT VA ratings?
RE: Standard CT & VT VA ratings?