A 11,000/6,600 V, 3-4, transformer has a star-connected primary and a delta-connected secondary. It supplies a 6.6 kV motor having a star-connected stator, developing 969.8kW at a power factor of 0.9 lagging and an efficiency of 92 per cent. Calculate a) motor line and phase currents b) transformer secondary current and c) transformer primary current

Electric Motor Control
10th Edition
ISBN:9781133702818
Author:Herman
Publisher:Herman
Chapter4: Symbols
Section: Chapter Questions
Problem 7SQ: The symbol shown is a(n) a. iron core transformer. b. auto transformer. c. current transformer. d....
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INSTRUCTIONS:
• Please write clearly and understandable way.
Write all the corresponding Given with their corresponding symbols and units.
Draw/Illustrate the diagram/circuit or drawings that is related to the problem,
IF POSSIBLE, which is HIGHLY REQUIRED.
• Solve in step-by-step, no shortcut.
● Underline twice the Final Answer.
PROBLEM:
A 11,000/6,600 V, 3-4, transformer has a star-connected primary and a delta-connected
secondary. It supplies a 6.6 kV motor having a star-connected stator, developing 969.8kW
at a power factor of 0.9 lagging and an efficiency of 92 per cent. Calculate
a) motor line and phase currents
b) transformer secondary current and
c) transformer primary current
Transcribed Image Text:INSTRUCTIONS: • Please write clearly and understandable way. Write all the corresponding Given with their corresponding symbols and units. Draw/Illustrate the diagram/circuit or drawings that is related to the problem, IF POSSIBLE, which is HIGHLY REQUIRED. • Solve in step-by-step, no shortcut. ● Underline twice the Final Answer. PROBLEM: A 11,000/6,600 V, 3-4, transformer has a star-connected primary and a delta-connected secondary. It supplies a 6.6 kV motor having a star-connected stator, developing 969.8kW at a power factor of 0.9 lagging and an efficiency of 92 per cent. Calculate a) motor line and phase currents b) transformer secondary current and c) transformer primary current
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