Answer to Question #275122 in Electrical Engineering for Queue

Question #275122

A 20 kVA closet transformer located inside a building is used to step down the voltage for the building. It is connected to a primary 4800 V AC power source. The ratio of the number of primary windings to the number of secondary windings on the transformer is 20 to 1 and 40 to 1.

a. Approximate the secondary voltage provided.

b. Approximate the current available, in amps


1
Expert's answer
2021-12-06T06:31:04-0500

a. Approximate the secondary voltage provided:

"V_{21}=4800\/20=240\\text{ V},\\\\\nV_{22}=4800\/40=120\\text{ V}."

b. Approximate the current available:


"I_{21}=20000\/240=83.3\\text{ A},\\\\\nI_{22}=20000\/120=167\\text{ A}."


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