Question # 4An industrial load consists of:A synchronous motor of 150 h.p.Induction motors aggregating 200 h.p., 0.707 power factor lagging and 82 % efficiency.Lighting load aggregating 30 KW.The tariff is Rs. 100 per annum per KVA maximum demand plus 8 paisa per KWH.Compute the following:Total annual bill when synchronous motor runs with 0.8 power factor lagging and efficiency of 94 %?Total annual bill when synchronous motor runs with 0.8 power factor leading and efficiency of 94 %?Annual saving in cost if synchronous motor is operated at leading power factor?

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Answered: Question # 4 An industrial load…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Question # 4

An industrial load consists of:

A synchronous motor of 150 h.p.
Induction motors aggregating 200 h.p., 0.707 power factor lagging and 82 % efficiency.
Lighting load aggregating 30 KW.

The tariff is Rs. 100 per annum per KVA maximum demand plus 8 paisa per KWH.

Compute the following:

Total annual bill when synchronous motor runs with 0.8 power factor lagging and efficiency of 94 %?
Total annual bill when synchronous motor runs with 0.8 power factor leading and efficiency of 94 %?
Annual saving in cost if synchronous motor is operated at leading power factor?

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