A 200-hp, three-phase, 460-V induction motor has a design life of 25 years at 110C rise in

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A 200-hp, three-phase, 460-V induction motor has a design life of 25 years at 110°C rise in conductor temperature above the ambient air. If it is continuously operated under unbalanced line voltages of 430, 450, and 480 V, determine:

(1) The percentage of voltage unbalance,

(2) The additional temperature rise when operating at rated load,

(3) The expected life at rated load, and

(4) The required horsepower derating for the motor to last the design life of 25 years.

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Introduction To Electrical Power And Power Electronics

ISBN: 9781466556607

1st Edition

Authors: Mukund R. Patel

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Question Posted: Dec 01, 2023 09:31 AM

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A 200-hp, three-phase, 460-V induction motor has a design life of 25 years at 110C rise in

Question:

Step by Step Answer:

1 The voltage unbalance can be calculated as Voltage unbalance Vmax Vmin Vavg 100 where Vmax maximum line voltage 480 V Vmin minimum line voltage 430 ...View the full answer

Introduction To Electrical Power And Power Electronics

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