Maschinenfabrik Reinhausen Gmbh

Alfred Bieringer

Christian Hammer

Andreas Stocker

Uwe Kaltenborn

Andreas Sachsenhauser

Christian Hurm

Wolfgang Albrecht

Sebastian Schmid

Eduard Zerr

Anatoli Saveliev

Gerhard Baeuml

Martin Pankofer

Dominik Plitzko

Thomas Strof

Martin Hausmann

Rolf Strempel

Christian Pircher

Thomas Schuster

Nikolaus Unterreiner

Hubert Zwirglmaier

Mario Schmeckebier

Riccardo Dalla Vecchia

Harald Hochmuth

Herbert Kammerl

Daniel Lassleben

Marco Hechtl

Gerhard BÄUML

A resistor assembly can be used in a tap changer. The resistor assembly may include: a resistor element, which is held by at least two resistor holders; a base plate with at least one opening and on which the at least two resistor holders holding the resistor element are arranged; a plurality of guides, respectively formed in each of the resistor holders and being configured to position a first end and a second end of the resistor element with respect to a longitudinal direction between the two resistor holders; and contact points of the resistor element, the contact points being electrically contacted by contacts of the tap changer in a condition where the resistor element is inserted into the resistor holder.

Resistor assembly for tap changer and tap changer

A selector for an on-load tap changer with a diverter switch includes: an insulating plate with a first side and a second side, the second side opposite the first side; a plurality of fixed contacts, which extend from the first side through the insulating plate to the second side; a first movable contact on the first side; a second movable contact on the second side; a first connection, which is connected with the first movable contact and which is connectable with a first branch of the diverter switch; and a second connection, which is connected with the second movable contact and which is connectable with a second branch of the diverter switch. Each of the first moveable contact and the second movable contact are selectably connectable with each of the fixed contacts.

Selector for an on-load tap changer and on-load tap changer with load transfer switch and selector

A load stepping switch () for uninterrupted changeover between winding taps (n, n+1) on a control winding () comprises &#x2014;a changeover switch () that comprises a first, second and third changeover contact () and can adopt a first position, in which the first and third changeover contacts are connected, a second position, in which the second and third changeover contacts are connected, and a bridge position, in which the changeover contacts are connected; &#x2014;a first fixed contact () that can be connected to a first winding tap; &#x2014;a second fixed contact () that can be connected to a second winding tap; &#x2014;a first moving contact () that can optionally make contact with each of the fixed contacts; &#x2014;a second moving contact () that can optionally make contact with each of the fixed contacts; &#x2014;a main path () that connects the first moving contact to the first changeover contact; &#x2014;an auxiliary path () that connects the second moving contact to the second changeover contact via a current-limiting element (); &#x2014;a switching element () that is connected between the main path and the second changeover contact.

On-load tap changer and method of and system for operating same

The invention relates to a switching arrangement () with a pre-selector () for a power transformer () which has multiple windings (). The pre-selector is designed to optionally connect at least one first winding () to one of the two end contacts () of at least one second winding (). At least one first switch is arranged in the connection between the pre-selector () and the first winding (), thereby allowing the pre-selector to be switched in an arc-free manner and thus in a gas-free manner as well.

Switching system with preselector

The invention relates to an on-load tap changer () according to the reactor switching principle for uninterrupted load switching between different tap windings of a tapped transformer (), comprising: &#x2014;an inductor () which is designed as an inductive transition reactance; &#x2014;the inductor () being part of the on-load tap changer ().

On-load tap changer according to the reactor switching principle

The invention relates to a step switch, comprising a pre-selector and a fine selector. The invention is characterized in that the step switch has a connection () between the pre-selector and the fine selector (), at least one coupling switch () being arranged in said connection. A pre-selector can be switched in a largely gas-free manner by means of said switchable connection with the aid of the fine selector.

An operational setting of an on-load tap changer used to switch between various winding taps of a tapped transformer is determined by first placing the on-load tap changer in operation with the tapped transformer and then moving the changer in a first rotational direction through a regulating range of its stationary operational settings on different winding taps of the tapped transformer toward an end abutment of the tapped transformer. The position is registered on reaching the end abutment of the regulating range of the on-load tap changer, and then the movement is reversed to return to the first stationary operational setting that is then configured as a predefined operational setting with the help of the parameterization that is stored in a nonvolatile memory of the control device.

Method of determining an operational setting of an on-load tap changer

The invention relates to a method for monitoring an on-load tap changer that is used to switch between winding taps of a tapped transformer without interrupting the load current and is actuated using a motor drive. According to the invention, prior to the actual load switching process, the on-load tap changer is initially moved a short distance, preferably against the direction in which the load is subsequently switched. In said initial process, it is verified whether the on-load tap changer has moved, i.e. has left its previous stationary position, and/or whether the torque on the motor drive has exceeded a predefined threshold value. The actual load switching process takes place only once the test has yielded a positive result.

Method for monitoring an on-load tap changer

The invention relates to an on-load tap changer for switching among different winding taps of a step transformer without interruption according to the preamble of the first patent claim. The general inventive concept lies in actuating both the selector contact unit and the switching means for uninterrupted load switching by means of a common motor drive without an energy store being connected therebetween.

On-load tap changer

The invention relates to an on-load tap changer for switching among different winding taps of a step transformer without interruption. According to the invention, the selector contact unit () and the switching means () for switching the load without interruption are jointly actuated without using an intermediate energy accumulator, by means of a threaded spindle () which is rotated by a drive motor () during a switching operation.

The invention relates to a distribution transformer having a tap-changing device for no-break switching between different winding taps of a distribution transformer. The general inventive concept consists in actuating both the selector contact unit and the switching means for no-break load switching by means of a common motor drive without interposition of an energy store.

Distribution transformer for voltage regulation of local distribution networks

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.

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Geiselhoering, Germany

Alfred Bieringer