Patent · US Expired

Transformer

US6456179B1 · kind B1 · utility

5Cited by

3References

3Claims

0Family size

Assignee

Merger Recipient ABB Oy · FI

Inventors

Johan Backa · Bergen, NO
Karl Engman · Vaasa, FI
Torvald Haldin · Kuni, FI
Esa Virtanen · Porvoo, FI

Key dates

Filing date	Dec 22, 2000
Grant date	Sep 24, 2002
Priority date	—
Expiry date	Dec 22, 2020

Classification

Technology area (CPC H)Electricity
CPC primaryH01F27/02
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A container (2) with an oil immersed core (1) and windings has corrugated walls. Bushing insulators (9,10) have pressure-resistant and water-resistant cable shoes (11). A tank encompasses another container (4) filled with insulating oil (3) and has pressure-resistant cable bushing (13) and connectors for electrical connections of the transformer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.