Three equal non-inductive resistances are connected in star across a balanced 400 V, 60 Hz system. A single phase wattmeter is connected on the system with its current coil in line 1 and potential coil in lines 1 and 3.This wattmeter registers 900 W. If the line 2 is accidentally open circuited, what will be the wattmeter reading under this condition?

Three equal non-inductive resistances are connected in star across a balanced 400 V, 60 Hz system. A single phase wattmeter is connected on the system with its current coil in line 1 and potential coil in lines 1 and 3.This wattmeter registers 900 W. If the line 2 is accidentally open circuited, what will be the wattmeter reading under this condition?

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter28: Three-phase Transformers

Section: Chapter Questions

Problem 2RQ: Two transformers rated at 100 kVA each are connected in an open-delta connection. What is the total...

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