230 volts

240 volts

415 volts

440 volts

13.33 kWh

1.33 kWh

0.133 kWh

0.0133 kWh

replacing the rotating disc with new one

drilling two diametrically opposite holes in the disc

reducing the considerable load

increasing the gap between the disc and permanent magnet

0 to 30 amperes (extended scale)

0 to 15 amperes (linear scale)

0 to 10 amperes (non. linear scale)

0 to 5 amperes (extended scale)

Dynamometer type wattmeter

Electrostatic type wattmeter

induction type wattmeter

Commutator type wattmeter