BONUS: A number of incandescent lamps are connected in delta across the lines of a balanced 230 V, 3-phase, 3-wire system. A single phase wattmeter is connected in the circuit. The current coil of the meter is connected in line 1 while the potential coil is connected across line 1 and 3. This wattmeter registers 8.4 kW. If the potential terminal of the meter, which was connected in line 3, is transferred to line 2, the wattmeter reads 7.5 kW. If each lamp is rated 100 W, how many lamps are connected across lines 1 and 2. Assume lamp pf to be unity.

BONUS: A number of incandescent lamps are connected in delta across the lines of a balanced 230 V, 3-phase, 3-wire system. A single phase wattmeter is connected in the circuit. The current coil of the meter is connected in line 1 while the potential coil is connected across line 1 and 3. This wattmeter registers 8.4 kW. If the potential terminal of the meter, which was connected in line 3, is transferred to line 2, the wattmeter reads 7.5 kW. If each lamp is rated 100 W, how many lamps are connected across lines 1 and 2. Assume lamp pf to be unity.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.31P: Figure 4.37 shows the conductor configuration of a three-phase transmission line and a telephone...

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