2. A 40 Hp, 460 V, three-phase, 60 Hz, induction motor has an efficiency of 93.6% when operating at 75% loading, with a power factor of 83%. The two-wattmeter method is used measure the power drawn by the motor. Wattmeter, W₁, wattmeter has its current connected in the yellow line, and its voltage coil between the yellow and red lines. Calculate the power measured by each wattmeter if: a. The motor is star-connected. b. The motor is delta-connected. = Note: 1 Hp 746 W CS Scanned with CamScanner

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter7: Alternating Current, Power Distribution, And Voltage Systems
Section: Chapter Questions
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2. A 40 Hp, 460 V, three-phase, 60 Hz, induction motor has an efficiency of 93.6% when
operating at 75% loading, with a power factor of 83%. The two-wattmeter method is used
measure the power drawn by the motor. Wattmeter, W₁, wattmeter has its current
connected in the yellow line, and its voltage coil between the yellow and red lines.
Calculate the power measured by each wattmeter if:
a.
The motor is star-connected.
b. The motor is delta-connected.
=
Note: 1 Hp 746 W
CS Scanned with CamScanner
Transcribed Image Text:2. A 40 Hp, 460 V, three-phase, 60 Hz, induction motor has an efficiency of 93.6% when operating at 75% loading, with a power factor of 83%. The two-wattmeter method is used measure the power drawn by the motor. Wattmeter, W₁, wattmeter has its current connected in the yellow line, and its voltage coil between the yellow and red lines. Calculate the power measured by each wattmeter if: a. The motor is star-connected. b. The motor is delta-connected. = Note: 1 Hp 746 W CS Scanned with CamScanner
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