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# Energy calculation

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energy measurement and calculation

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### Energy calculation

1. 1. EnErgy calculation -B. Prasad Chartered Engineer amieclub@gmail.com
2. 2. Electrical Energy Basics Electric current is divided into two types:  Directional Current (DC)  Alternating Current (AC). Kilovolt Ampere (kVA)  Single phase electrical circuit , Apparent power (kVA) = Voltage x Amperes/1000  Three phase electrical circuit , Apparent power (kVA) =1.732 x Voltage x Amperes/1000
3. 3. kVAr(Reactive Power)  kVAr is the reactive power. Reactive power is the portion of apparent power that does no work. This type of power must be supplied to all types of magnetic equipment, such as motors, trans- formers etc. Larger the magnetizing requirement, larger the kVAr.
4. 4. Kilowatt-hour(kWh)  Kilowatt-hour is the energy consumed by 1000 Watts in one hour. If 1kW (1000 watts) of a electrical equipment is operated for 1 hour, it would consume 1 kWh of energy (1 unit of electricity).
5. 5. Three phase AC powermeasurement  Most of the motive drives such as pumps, compressors, machines etc. operate with 3 phase AC Induction motor. Power consumption can be determined by using the relation. Power= 1.732 x V x I x CosF
6. 6. Single phase AC powermeasurement  A watt meter Measures power consumed by an apparatus in a given time. Normally watt meter gives reading in watt or kilowatt. A Wattmeter have two coils one is current coil and other is voltage coil. The power is product of Voltage across the load and current flowing through the load i.e.
7. 7. Power measurement in 3-phase
8. 8. ACT FAST AND INITIATE FIRST  बड़ा    सोचो         तेजी से सोचो व     सबसे पहले सोचो  िवचारो     पर िकसी का       एकािधकार नही होता.   ----  धीरभाई अमबानी
9. 9. THANK YOU
10. 10. THANK YOU