In a 3-phase balanced star or delta system, the least number of wattmeter essential to measure the power is O one O four O three O two

Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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In a 3-phase balanced star or delta system, the least number of wattmeter essential to measure the power
is
O one
O four
O three
O two
The load connected to a 3-phase supply comprises three similar coils connected in star. The line currents are
15 A and the kVA ratings and input power are 15KVA and 8kW respectively.
(a) Find the line and phase voltage.
(b) If the coils are now connected in delta to the same three-phase supply, calculate the line current and phase
current.
Chp
f10
10
&
8.
6.
7.
A
60
O O OO
Transcribed Image Text:In a 3-phase balanced star or delta system, the least number of wattmeter essential to measure the power is O one O four O three O two The load connected to a 3-phase supply comprises three similar coils connected in star. The line currents are 15 A and the kVA ratings and input power are 15KVA and 8kW respectively. (a) Find the line and phase voltage. (b) If the coils are now connected in delta to the same three-phase supply, calculate the line current and phase current. Chp f10 10 & 8. 6. 7. A 60 O O OO
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