Clamping system in AC electricity supply meter - laminations constituting tension core and pole's middle flank form integral pieces

摘要

The clamping system in an a.c. electricity supply meter comprises a tension core with two parallel flanks. A holding pole, receiving a setting coil, is mounted between the flanks. Metal laminations form the core (3, 4, 5) and a centre flank (6) of the pole (7) from integral pieces. At least one steel plate (12, 13, 14) serving as holding pole cross piece (11), is fitted at the open end (9) of the centre flank (6) to create with the other flanks (4, 5) two air gaps (23, 24). At least a part of the outer surface of the steel plate(s) (14), the flank ends (19, 20) and the end surface (25) of the pole (7) are on a plane parallel to the rotational plane of a counter rotor.