induction watthour meter

induction watthour meter

[in′dək·shən ′wät‚au̇r ‚mēd·ər]
(electricity)
A watthour meter used with alternating current; the energy taken by a circuit over a period of time is proportional to the rotation in that period of a light aluminum disk, in which a driving torque is developed by the joint action of the alternating magnetic flux produced by the potential circuit and by the load current.