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3-ph, 3-wire balanced load with a lagging power factor is supplied at petween lines. A single-phase wattmeter when connected with its current coil n the A-line and potential coil between A and B lines gives a reading of 6 kW. When the same terminal of the voltage coil are switched over to B- and C- lines, the current coil connections remaining the same, the reading of the wattmeter emains unchanged. Calculate the line current and the pf of the load.

3-ph, 3-wire balanced load with a lagging power factor is supplied at petween lines. A single-phase wattmeter when connected with its current coil n the A-line and potential coil between A and B lines gives a reading of 6 kW. When the same terminal of the voltage coil are switched over to B- and C- lines, the current coil connections remaining the same, the reading of the wattmeter emains unchanged. Calculate the line current and the pf of the load.

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-ph, 3-wire balanced load with a lagging power factor is supplied at 400 V between lines. A single-phase wattmeter when connected with its current coil in the A-line and potential coil between A and B lines gives a reading of 6 kW. When the same terminal of the voltage coil are switched over to B- and C- lines, the current coil connections remaining the same, the reading of the wattmeter remains unchanged. Calculate the line current and the pf of the load.
Transcribed Image Text:A 3-ph, 3-wire balanced load with a lagging power factor is supplied at 400 V between lines. A single-phase wattmeter when connected with its current coil in the A-line and potential coil between A and B lines gives a reading of 6 kW. When the same terminal of the voltage coil are switched over to B- and C- lines, the current coil connections remaining the same, the reading of the wattmeter remains unchanged. Calculate the line current and the pf of the load.
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