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1. (IN5054/KOLNP/2007) TAP CHANGER

Office : India
Application Number: 5054/KOLNP/2007 Application Date: 27.12.2007
Publication Number: 5054/KOLNP/2007 Publication Date: 27.06.2008
Grant Number: 254829 Grant Date: 28.12.2012
Publication Kind : B
Prior PCT appl.: Application Number:PCTEP2006063612 ; Publication Number:WO2007003537 Click to see the data
IPC:
H01F 27/14
H01H 9/00
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
F
MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
27
Details of transformers or inductances, in general
08
Cooling; Ventilating
10
Liquid cooling
12
Oil cooling
14
Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
H
ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
9
Details of switching devices, not covered by groups H01H1/-H01H7/104
Applicants: SIEMENS AKTIENGESELLSCHAFT
Inventors: JORG FINDEISEN
Priority Data: 102005031359.0 30.06.2005 DE
Title: (EN) TAP CHANGER
Abstract:
(EN) The invention relates to a tap changer(SI) that is filled with an insulating liquid as well as devices for absorbing the variations in the volume of saidinsulating liquid due to thermal conditions. Accordingto the invention, a gas cushion is provided which is integrated into the tap changer vessel (SW, SK) and isformed by members (K3, K5, K6) that absorb the variations in the volume of the insulating liquid by changing the shape thereof. Furthermore, a gas cushion envelope is provided which prevents the gas of the gascushion to be mixed with the gases generated by thethermal decomposition of the insulating liquid.
Also published as:
EP1897102US20080198569CN101233588WO/2007/003537