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Instrument Transformers ANSI Standards

Instrument Transformers ANSI Standards

Instrument Transformers ANSI Standards

(OP)
Hello all,

I am specifying a voltage and current transformer for metering purposes on a 138kV system operation voltage under ANSI standards. I thought of specifying a 0.3WXYZ (200VA Burden) for the voltage transformer and a 0.3B1.8 (45VA Burden) for the current transformer.

As you might already know, electronic relays and meters have very low burden (.1VA or so), but I was also told that the accuracy and burden that I am specifying is the minimum standard fabricated for this voltage. Is that true? and if so, would this affect the performance of the instrument transformers.

Thank you,

-Pablo

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