Plug and Socket Pure Gas Insulated Wall Bushing for HVDC and UHV
AssigneeALSTOM Technology Ltd
InventorsGiovanni Testin, Luca Crocco, Milorad Sehovac
Life of this patent
Estimating the term…
Abstract
The invention relates to the domains of power electronics and electric power transmission systems and concerns a new structure for wall bushings for High and Ultra High Voltage AC or DC applications. The wall bushing is remarkable as it can be assembled as a kit of two replaceable modules: a plug type module (20) and a socket type module (30) whose central conductors (15a,15b) are connected by a joint that allows their thermal expansion.
Claims13
1-12. (canceled)
Plug type module (20) forming one section of a high voltage AC or DC wall bushing made in pure gas technology, said plug type module comprising an insulating tube (3) that is axially extended at a first end thereof by an internal tubular section of a central flange part (2a) arranged at a first end (21) of the plug type module, said insulating tube (3) and said central flange part (2a) surrounding a central cylindrical conductor (15a), said conductor axially extends along the plug type module and has an extremity at said first end (21) of said plug type module, the plug type module having at its second end (22) a flange (4) that seals it and that supports the central conductor, said plug type module being designed to be electrically plugged on operation site into a socket type module (30) that forms the other section of a high voltage AC or DC wall bushing made in pure gas technology by reversibly sealing the central flange part (2a) of said plug type module with a central flange part (2b) of the socket type module and by removably connecting said extremity of the central conductor (15a) of said plug type module to a central conductor (15b) of the socket type module, in this way the plug and socket modules can be transported as separate parts to be assembled on site.
Socket type module (30) forming a second section of a high voltage AC or DC wall bushing made in pure gas technology, said socket type module comprising an insulating tube (3) that is axially extended at a first end thereof by an internal tubular section of a central flange part (2b) arranged at a first end (31) of the socket type module, said central flange part (2b), said insulating tube and said central flange part (2b) of the socket type module surrounding a central cylindrical conductor (15b) that axially extends along the socket type module and has an extremity at said first end (31) of said socket type module, the socket type module having at its second end (32) a flange (4) that seals it and that supports the central conductor (15b), the socket type module being designed to receive on operation site a plug type module (20) forming an outer section of a high voltage AC or DC wall bushing made in pure gas technology by reversibly sealing the central flange part (2a) of the plug type module with the central flange part (2b) of said socket type module and by removably connecting said extremity of the central conductor (15b) of said socket type module to said extremity of the central conductor (15a) of the plug type module, in this way the plug and socket modules can be transported as separate parts to be assembled on site.
High voltage AC or DC wall bushing made in pure gas technology comprising the socket type module according to claim 7, the wall bushing further comprising:
- a plug type module (20) forming one section of the high voltage AC or DC wall bushing made in pure gas technology, said plug type module comprising an insulating tube (3) that is axially extended at a first end thereof by an internal tubular section of a central flange part (2a) arranged at a first end (21) of the plug type module, said insulating tube (3) and said central flange part (2a) surrounding a central cylindrical conductor (15a), said conductor axially extends along the plug type module and has an extremity at said first end (21) of said plug type module, the plug type module having at its second end (22) a flange (4) that seals it and that supports the central conductor, said plug type module being designed to be electrically plugged on operation site into a socket type module (30) that forms the other section of a high voltage AC or DC wall bushing made in pure gas technology by reversibly sealing the central flange part (2a) of said plug type module with a central flange part (2b) of the socket type module and by removably connecting said extremity of the central conductor (15a) of said plug type module to a central conductor (15b) of the socket type module, in this way the plug and socket modules can be transported as separate parts to be assembled on site,
- wherein the first end (21) of the plug type module and the first end (31) of the socket type module are in contact, the central flange of the wall bushing is formed by the reversibly sealing of the central flange part (2a) of the plug type module and the central flange part (2b) of the socket module, the central conductor of the wall bushing is formed by the central conductor (15a) of the plug module and the central conductor (15b) of the socket module that are electrically connected at the first end of each module, said flange (4) of each module carries a connecting terminal (5) that extrudes from the module for connecting said bushing to high voltage devices, and said central flange comprises means for filling the wall bushing with high pressurized gas.
Dependencies are inferred from the claim text.