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A 480 volt 3-phase motor draws 375 amps of inrush current when started across the line and produces 250 % of normal full load torque. The starting current is 800% of the FLA rating of the motor. If using an autotransformer starter, determine the line inrush amps and motor amps for the 50%, 65% and 80% taps. (answer to 3 significant figures without units) 80% Tap I Inrush = Amps I Line = Amps 65% Tap I Inrush = Amps I Line = Amps 50% Tap I Inrush = Amps I Line = Amps

A 480 volt 3-phase motor draws 375 amps of inrush current when started across the line and produces 250 % of normal full load torque. The starting current is 800% of the FLA rating of the motor. If using an autotransformer starter, determine the line inrush amps and motor amps for the 50%, 65% and 80% taps. (answer to 3 significant figures without units) 80% Tap I Inrush = Amps I Line = Amps 65% Tap I Inrush = Amps I Line = Amps 50% Tap I Inrush = Amps I Line = Amps

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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A 480 volt 3-phase motor draws 375 amps of inrush current when started across the line and produces 250 % of normal full load torque. The starting current is 800% of the FLA rating of the motor. If using an autotransformer starter, determine the line inrush amps and motor amps for the 50%, 65% and 80% taps. (answer to 3 significant figures without units) 80% Tap I Inrush = Amps I Line = Amps 65% Tap I Inrush = Amps I Line = Amps 50% Tap I Inrush = Amps %3D I Line = Amps
Transcribed Image Text:A 480 volt 3-phase motor draws 375 amps of inrush current when started across the line and produces 250 % of normal full load torque. The starting current is 800% of the FLA rating of the motor. If using an autotransformer starter, determine the line inrush amps and motor amps for the 50%, 65% and 80% taps. (answer to 3 significant figures without units) 80% Tap I Inrush = Amps I Line = Amps 65% Tap I Inrush = Amps I Line = Amps 50% Tap I Inrush = Amps %3D I Line = Amps
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