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A 3-phase,50HZ, 150 KVA, 2200/220 V transformer supplies a 3- phase load drawing 120 KVA and 90 KW lagging on the 220 V side. The transformer is made up of three single phase transformers connected Y/Y and having the following per phase values given: RH=0.42; XH-22; RL=4m2; XL=20m2; RCH=10k2; XmH=8k2. Determine: (a) The primary voltage. (b) Efficiency. (c) The voltage regulation of the transformer.

A 3-phase,50HZ, 150 KVA, 2200/220 V transformer supplies a 3- phase load drawing 120 KVA and 90 KW lagging on the 220 V side. The transformer is made up of three single phase transformers connected Y/Y and having the following per phase values given: RH=0.42; XH-22; RL=4m2; XL=20m2; RCH=10k2; XmH=8k2. Determine: (a) The primary voltage. (b) Efficiency. (c) The voltage regulation of the transformer.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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A 3-phase,50HZ, 150 KVA, 2200/220 V transformer supplies a 3- phase load drawing 120 KVA and 90 KW lagging on the 220 V side. The transformer is made up of three single phase transformers connected Y/Y and having the following per phase values given: RH-0.4N; XH-22; RL=4m2; XL=20mN; RCH=10k2; XmH=8k2. Determine: (a) The primary voltage. (b) Efficiency. (c) The voltage regulation of the transformer.
Transcribed Image Text:A 3-phase,50HZ, 150 KVA, 2200/220 V transformer supplies a 3- phase load drawing 120 KVA and 90 KW lagging on the 220 V side. The transformer is made up of three single phase transformers connected Y/Y and having the following per phase values given: RH-0.4N; XH-22; RL=4m2; XL=20mN; RCH=10k2; XmH=8k2. Determine: (a) The primary voltage. (b) Efficiency. (c) The voltage regulation of the transformer.
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