A suspension string has 3 units. Each unit can withstand a maximum peak voltage of 11kV. The capacitance of each joint and metal work is 20% of the capacitance od each disc.

Electric Motor Control
10th Edition
ISBN:9781133702818
Author:Herman
Publisher:Herman
Chapter3: Magnetic Starters
Section: Chapter Questions
Problem 30SQ
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A suspension string has 3 units. Each unit can withstand a maximum peak voltage of 11kV. The capacitance of each joint and metal work is 20% of the capacitance od each disc. Find (i) maximum line voltage for which the string can be used. (ii) string efficiency
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