A meter has a constant of 600 revolutions per kWh. If the meter makes 10 revolutions in 20 seconds, what is the load in kW?

Meter constant K = Number of revolution/Kwh (rev/kWh)

Number of revolution = 10

Energy consumed when the disc made 10 revolution

= 10 × 1/600 = 1/60 KWh

Now energy consumed is equal to load in kW multiplied by time in hours i.e.

Load × 20/3600 = 1/60

Load = 3600/120

Load = 3 kW

0.75 kW