ON-LOAD TAP CHANGER WITH WORM GEAR

摘要

The invention relates to a worm gear which is arranged directly on the head of an on-load tap changer and has a housing, a worm, and a worm wheel, wherein means for torque detection comprising at least one radio-scannable surface wave sensor, a rotor antenna and a stator antenna are provided in the interior of the worm gear.

主权项

1. A tap changer with a worm transmission, wherein
the worm transmission is arranged directly at the head of the tap changer, the worm transmission has an upper housing part and a lower housing part, the worm transmission comprises a worm driven by a motor, the worm is mechanically connected with a worm wheel, the worm wheel is connected with a shaft, wherein the worm drives the shaft by way of the worm wheel the shaft drives the tap changer, means for torque detection are provided in the worm Transmission, the means for torque detection consist of at least one surface-wave sensor that can be interrogated by radio a rotor antenna and a stator antenna, the at least one surface-wave sensor interrogatable by radio is fastened on the shaft, the rotor antenna conductively connected with the at least one surface-wave sensor interrogatable by radio is fastened to the shaft and the stator antenna axially spaced from the rotor antenna is fixedly arranged at the lower housing part directly or by way of a mount.