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Is the Transformer data on the Motor Data slide rule for secondary current or primary current?

Issue:
Transformer Amperage chart on the Motor Data Calculator

Product Line:
LV Transformers

Environment:
Applies to Low Voltage Transformers by SquareD/Schneider Electric

Cause:
Data on Dry Type Transformer Data chart


Resolution:
The data is applicable to the kVA and voltage and is independent of whether it is the primary or secondary.

For example, an  EE75T3H is a 480 delta to 208Y/120 Transformer. The FLA pn the primary (480V) is 75,000/480/1.732 = 90 amps. The FLA on the secondary (208V) is 75,000/208/1.732 = 208 amps. An EE75T212H is a 208 delta to 480Y/277 transformer. The FLA on the primary (208V) is 208 amps, and the FLA on the secondary (480V) is 90 amps. Note that the FLA is dependent upon voltage and kVA only!


CTA-ID : 2009365
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