Maschinenfabrik Reinhausen Gmbh

Mario Schmeckebier

Dieter Dohnal

Karsten Viereck

Alfred Bieringer

Daniel Lassleben

Alexander Winterer

Marco Hechtl

Manfred Stadelmayer

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.

On-load tap changer with worm gear

The invention relates to a method for monitoring an on-load tap changer according to the known 'windowing technique,' wherein for synchronization, the current (I) on the diverter switch is continuously detected, the effective value (Ieff) is calculated, which in turn is differentiated. The corresponding point in time, at which the maximum or minimum of the differentiated value occurs, is evaluated to be the moment for the diverter switch leap (tLU), and produces the synchronization impulse.

Method for monitoring an on-load tap changer

A method of controlling a step switch. From the measured values of current, voltage and phase angle at an electric drive motor during actuation of the step switch the individual picked-up active output is calculated. From the active output the corresponding torque at the drive motor is calculated. The torque in the step switch which is crucial for controlling is determined on the basis of the torque by using a specifically calculated transfer function. The transfer function is newly determined every time the switch is actuated, with the values of the preceding switch operation or the preceding switch operations being taken as a basis of the new calculation.

Method of controlling step switches

Growing community of inventors

Wuppertal, Germany

Mario Schmeckebier