# List any four errors in induction type energy meter. Give method of compensation for each.

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List any four errors in induction type energy meter. Give method of compensation for each.

Errors in Induction Type Energy Meter with their Compensation:

1) Error due to friction: This error can be compensated by the additional shading band provided on the shunt electromagnet.

2) Phase or low p.f. error:To overcome this error the shading band is provided on the central limb of the shunt electromagnet.

3) Error due to temperature variation: The effects of temperature changes on the driving and braking system tend to balance each other, hence no need of compensation.

4) Error due to variation of frequency: The frequency should be kept constant.

5) Creeping error: This error can be compensated by providing two small holes on the disc diametrically opposite side.When the hole comes under the pole of a shunt magnet,the disc stops running.

6) Error in Registration: This error can be compensated by adjusting the braking magnet or changing registering system.

7) Speed error: This error can be compensated by readjusting the compensating mechanism.

8) Overload error: This error can be compensated by providing a ‘flux diverter’ to the current magnet.

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