Question about 450.3(C)

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macmikeman

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The nomenclature of 450.3 (C) is confusing me. Voltage transformers, as per 450.3 (C). Are not all the standard dry type 480 v delta primary to 208v/120v secondary transformers "voltage transformers", or is this referring to some other type, such as control wiring step down transformers?.
 
Re: Question about 450.3(C)

Voltage transformers or "PT's" are usually considered instrument transformers and they step voltages down to a level compatible with instruments. They are for measurements, not for power.

They are not your standard 480 to 120/208 transformer.

Jim T
 
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