Abb Technology Ag

Abb Power Td & Company

Paul Sz&aacute;sz

Thomas J Lanoue

Harald Reiss

Rush Horton, Jr

Dietrich Bonmann

Harold R Younger

Thomas L Baldwin

Varagur R Ramanan

Charles H Sarver

Michael D White

An internal heating method for drying, gelling and final curing of epoxy resin insulation systems used for encapsulating dry type cast distribution transformer coils is disclosed. The internal method uses a Direct-Current (DC) power source to control and supply DC current to resistively heat the transformer coil encapsulated with a liquid resin under vacuum in a mold. DC current is applied to a given coil based on its conductor cross-sectional area and its epoxy resin quantity to achieve a specified temperature for drying, gelling and final curing. The temperature, controlled by DC resistive heating is maintained for a given period for each step.

DC voltage/current heating/gelling/curing of resin encapsulated distribution transformer coils

A cryostat for a superconducting transformer is provided that includes non-conducting load bearing insulation and is adapted for use with a superconducting transformer. In addition, the cryostat prevents the formation of closed loop stray currents on its outer case. The cryostat contains the winding sets and other related electrical equipment of a transformer. The cryostat generally comprises a cryogenic tank having an outer wall, a non-conducting liner, and a load bearing insulation layer disposed therebetween. The tank holds a liquid or gaseous cryogenic coolant into which the components of the transformer are immersed. A plurality of passages allow the passage of the limbs of the iron core of the transformer through the tank.

Cryostat for use with a superconducting transformer

Growing community of inventors

Plankstadt, Germany

Paul Szász

Growing community of inventors

Plankstadt, Germany

Paul Sz&aacute;sz

Paul Szász