A 208-volt three-phase transformer delivers 125 amperes at full load. Using 1.732, approximately what kVA rating does that represent?

Texas Journeyman exam practice question · Services & Separately Derived Systems

A 208-volt three-phase transformer delivers 125 amperes at full load. Using 1.732, approximately what kVA rating does that represent?

A30 kVA
45 kVA
C37.5 kVA
D62.4 kVA

Why B is correct

Three-phase apparent power is 1.732 × 208 × 125 = 45,032 volt-amperes, approximately 45 kVA. Keep units consistent and use only the factors stated; no optional method or unstated demand factor is assumed.

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A 208-volt three-phase transformer delivers 125 amperes at full load. Using 1.732, approximately what kVA rating does that represent?

A 208-volt three-phase transformer delivers 125 amperes at full load. Using 1.732, approximately what kVA rating does that represent?

More Services & Separately Derived Systems questions