Each branch of a three-phase star-connected load consists of a coil of resistance 4.2 Ω and reactance 5.6 Ω. The load is supplied at a line voltage of 400 V, 50 Hz. The total active power supplied to the load is measured by the two-wattmeter method. Draw a circuit diagram of the wattmeter connections and calculate their separate readings. Derive any formula used in your calculations. ANS: 13.1 kW, 1.71 kW

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter2: Fundamentals
Section: Chapter Questions
Problem 2.7P: Let a 100V sinusoidal source be connected to a series combination of a 3 resistor, an 8 inductor,...
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Each branch of a three-phase star-connected load

consists of a coil of resistance 4.2 Ω and reactance

5.6 Ω. The load is supplied at a line voltage of 400 V,

50 Hz. The total active power supplied to the load

is measured by the two-wattmeter method. Draw a

circuit diagram of the wattmeter connections and

calculate their separate readings. Derive any formula

used in your calculations.

ANS:

13.1 kW, 1.71 kW

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