Commissioning Procedure for Current Transformers Current transformers (CTs) can be broadly divided in to two type, Indoor and outdoor type. Indoor type – Cast resin : wound type and window type. Outdoor type – Live tank , Oil cooled and dead tank , oil cooled. CT rating are specified as follows- Metering core 200/5 – nominal ratio 15VA – Rated burden : the maximum burden (i.e. impedance) that may be connected on the CT secondary side. Class 1.0- Accuracy at 100% rated current and burden is 1.0% Protection Core 200/5-…
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