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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Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.