Abstract: An apparatus for electrically setting the overload compensating magnetic reluctance in a single phase induction watthour meter includes a moveable magnetic shunt positioned adjacent the poles of a current core of a current stator circuit. An electrical parameter of the current stator circuit is sensed and changes in this parameter are used to set the air gap between the magnetic shunt and the current core poles. In one embodiment, a programmable controller controls a motor to move the shunt in response to variation of the sensed electrical parameter from a predetermined value. In one method, the sensed electrical parameter is the voltage induced in a first current coil when a second current coil is energized. In other methods, the sensed electrical parameter is the flux induced in the magnetic shunt or the self inductance of a current coil.

Abstract: A mating ring for mounting a meter cover to a meter base includes a molded plastic mating ring having portions configured to engage the meter cover flange and portions configured to engage the meter base. A plurality of wedges and opposing ring flanges are provided on the ring to hold the cover flange. The wedges have a sloped surface to facilitate assembly using a donut press. The mating ring engagement features are designed to facilitate one piece molding of the ring.