Siemens Aktiengesellschaft

Siemens Energy Global Gmbh & Co. Kg

Alfons-Karl Schrammel

Helmut Pregartner

Peter Hamberger

Gerald Leber

Stefan Riegler

Anton Holzer

Helfried Passath

Guenter Pretterhofer

Ewald Schweiger

Gunter Pretterhofer

Günter Pretterhofer

Peter Dr Hamberger

An assembly for connection to a high-voltage system has multiple single-phase transformers each having a transformer tank which is filled with a fluid and in which a core with at least one winding is situated. At least some of the windings of the single-phase transformers are connected to one another, forming a neutral point. A short-circuit voltage curve or impedance of the assembly can be adapted to different requirements. The windings are each connected to the neutral point via a switchover unit and a choke winding. The choke winding has multiple tappings, and the switchover unit is configured to select the tapping via which the winding in question is connected to the neutral point.

Assembly for connection to a high-voltage system with adjustable impedance

Measuring arrangement for detecting a magnetic unidirectional flux in the core of a transformer, wherein a sensor, formed from a ferromagnetic sensor core which is surrounded by a sensor coil, is arranged in a section of a core limb in a cooking channel, where the section is predefined by the width of the winding, or is arranged in an annular space, formed from an outer peripheral surface of the core limb and an inner peripheral surface of an associated transformer winding, such that a magnetic partial flux is diverted by the core limb and guided over at least one non-ferromagnetic gap.

Measuring arrangement for detecting a magnetic unidirectional flux in the core of a transformer

An arrangement for reducing the radiation of noise from liquid-cooled transformers or chokes includes a tank having stiffeners arranged outside on the side walls of the tank, where a region situated between each stiffener is covered by a sandwich panel that is fastened to each stiffener, where each sandwich panel has a metallic wall that hermetically closes off a cavity that is filled with a composition composed of a polymer material and a filler material, where the composition has a specific weight of &#x3e;2 grams per cubic centimeter.

Arrangement for reducing radiation of noise from liquid-cooled transformers or chokes

A transformer having a magnetic core which includes at least one leg with a winding arrangement and a yoke, wherein a compensation winding arrangement is provided to compensate for a unidirectional flux fraction that flows in the at least one leg, and the compensation winding arrangement is arranged on the yoke.

Transformer and method for retrofitting a transformer

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Waldbach, Austria

Alfons-Karl Schrammel