Patent ID: 9360091
Filing Date: 2016-06-07
CPC Classification: F16H,H01H,Y10T

Claim Text:
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 such that the worm drives the shaft via the worm wheel, the shaft drives the tap changer, means for torque detection are provided in the worm transmission and 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 fixed at the lower housing part directly or by a mount.