A single-phase 230 V, 1 kW heater is connected across a single-phase, 230 V, 50 Hz supply through an SCR. For firing angle of 45° and 90°, calculate the power absorbed by the heater-element

Q: V1 4 Vrms R2 + R3 R4 750 Hz 0°

A: Let the equivalent resistance be Req

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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.