An industrial customer with a three-phase, 480 V service entrance is running the following set of loads: • One 12 ton heat pump1 with a COP of 2.7 and a 0.90 lagging power factor • Three 5 HP, 87% efficient lathes, 0.82 lagging power factor • Three electric autoclaves, 10 kBTU/h, 98% efficient, 0.97 lagging PF • One 12 kW high-intensity discharge (HID) lighting system, unity PF If the lighting system is replaced with a T8 fluorescent system with magnetic ballast that consumes 25% less than the previous system, but introduces a 0.89 leading power factor, by how much does the service entrance current change? Consider the case when all systems are fully loaded. Consider the AC load under the new lighting regime
An industrial customer with a three-phase, 480 V service entrance is running the following set of loads: • One 12 ton heat pump1 with a COP of 2.7 and a 0.90 lagging power factor • Three 5 HP, 87% efficient lathes, 0.82 lagging power factor • Three electric autoclaves, 10 kBTU/h, 98% efficient, 0.97 lagging PF • One 12 kW high-intensity discharge (HID) lighting system, unity PF If the lighting system is replaced with a T8 fluorescent system with magnetic ballast that consumes 25% less than the previous system, but introduces a 0.89 leading power factor, by how much does the service entrance current change? Consider the case when all systems are fully loaded. Consider the AC load under the new lighting regime
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
Chapter2: Fundamentals
Section: Chapter Questions
Problem 2.16P: A single-phase, 120V(rms),60Hz source supplies power to a series R-L circuit consisting of R=10 and...
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An industrial customer with a three-phase, 480 V service entrance is running the following
set of loads:
• One 12 ton heat pump1 with a COP of 2.7 and a 0.90 lagging power factor
• Three 5 HP, 87% efficient lathes, 0.82 lagging power factor
• Three electric autoclaves, 10 kBTU/h, 98% efficient, 0.97 lagging PF
• One 12 kW high-intensity discharge (HID) lighting system, unity PF
If the lighting system is replaced with a T8 fluorescent system with magnetic ballast that
consumes 25% less than the previous system, but introduces a 0.89 leading power factor, by
how much does the service entrance current change? Consider the case when all systems are
fully loaded. Consider the AC load under the new lighting regime
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