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Previous Year GATE problems based on Energy Meter By- Pawan Chandani

Q 3. A single-phase energy meter is operating on 230V, 50Hz supply with a load of 20A for two hours at upf. The meter makes 1380 revolutions in that period. The meter constant is 2ol.

Q 3. A single-phase energy meter is operating on 230V, 50Hz supply with a load of 20A for two hours at upf. The meter makes 1380 revolutions in that period. The meter constant is 230 x 20x 14.6 kw 1380 150 e kwh E (kwh 9.2

Q 4. The meter constant of a 1-0 240V induction watt-hour meter is 400 revolutions per kWh. The speed of the meter disc for a current of 10A at 0.8 lagging will be

Q 4. The meter constant of a 1-0 240V induction watt-hour meter is 400 revolutions per kWh. The speed of the meter disc for a current of 10A at 0.8 lagging will be 240 X10x O.8 1.92 KW looo PK = 1.92 kW x 400 re /kWh = 768 et/hr N= 768 = 12.8 60

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