17. A manufacturing plant has a load of 3,600 kva at a lagging power factor of 0.707. A 500-hp synchronous motor having an efficiency of 90 per cent is installed and is used also to improve the over-all power factor to 0.937 lagging. Calculate the kilovolt-ampere input rating of the synchronous motor and the power factor at which it must operate.

17. A manufacturing plant has a load of 3,600 kva at a lagging power factor of 0.707. A 500-hp synchronous motor having an efficiency of 90 per cent is installed and is used also to improve the over-all power factor to 0.937 lagging. Calculate the kilovolt-ampere input rating of the synchronous motor and the power factor at which it must operate.

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter39: Synchronous Motor Operation

Section: Chapter Questions

Problem 14SQ: Induction motors and welding transformers require magnetizing current, which causes a. lagging power...

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17. A manufacturing plant has a load of 3,600 kva at a lagging power factor of 0.707.
A 500-hp synchronous motor having an efficiency of 90 per cent is installed and
is used also to improve the over-all power factor to 0.937 lagging. Calculate the
kilovolt-ampere input rating of the synchronous motor and the power factor at
which it must operate.

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