# US 2014/0190803 A1 · Load transfer switch for a tap changer

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- Number: US 2014/0190803 A1
- Document ID: US20140190803A1
- Status: Published application
- Kind: A1
- Application number: 13/642,134
- Filed: 2011-02-23
- Published: 2014-07-10
- Earliest claimed: 2010-05-11
- Assignees: Ucl Businessw PLC
- Inventors: Martin Jatta; Christian Kotz; Elke Wuersching nee Trué; Hubert Zwirgimaier
- Web page: https://patentgrep.com/patent/US20140190803A1

## CPC

- H01H 9/0027: {Operating mechanisms}
- H01F 29/04: having provision for tap-changing without interrupting the load current
- H01H 9/0044: {Casings; Mountings; Disposition in transformer housing}
- H01H 2003/3068: {Housing support frame for energy accumulator and cooperating mechanism}
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

The invention relates to a load transfer switch for a tap changer for switching among various winding taps of a step transformer without interruption. The general inventive concept lies in fastening both the force accumulator and the load transfer switch not on the bearing plate but rather on the force accumulator support by providing additional receptacles on the force accumulator support, which receptacles are supported over a large area on the oil tank, in particular on the upper permanent main contact supports fastened to the oil tank, of each phase of the load transfer switch in such a way that the force accumulator support is fixed both in the horizontal direction and the vertical direction and thus mechanically unburdens the bearing plate.

## Claims

### Claim 1

A load changeover switch for a tap changer for uninterrupted switching over between different winding taps of a tapped transformer, with a separate oil vessel which surrounds it and in the wall of which and penetrating this are provided electrical connecting contacts, which are arranged circularly in at least one horizontal plane and for each electrical phase to be switched, for the load shunt on the one hand and each of the two sides A and B of the load changeover switch—between which there is switching over and the connection with the load to shunt is produced—on the other hand, wherein provided in the interior of the oil vessel is a load changeover switch insert, which for its part comprises a force store fastened to a force store carrier, electrical switching means, which are fixed by way of a mounting plate, for load switching over, means for actuation of the electrical switching means, and switch-over resistances, wherein apart from the force store also of the entire load changeover switch insert with all its components is fastenable to the force store carrier and that provided at the force store carrier is a plurality of mounts which are so supported over a large area at the respective upper permanent main contact carriers, which are fastened to the oil vessel, of each phase of the load changeover switch that the force store carrier is fixed not only in horizontal direction, but also in vertical direction.

### Claim 2 (depends on 1)

The load changeover switch according to claim 1, wherein the inner sides of the plurality of mounts are dielectrically insulated.