Tower mounted high voltage switchgear

Patent metadata

Field	Value
Publication number	US-11799274-B2
Application number	US-202017614730-A
Country	US
Kind code	B2
Filing date	Mar 25, 2020
Priority date	May 31, 2019
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

A tower mounted high voltage gas-insulated switchgear including a supporting structure connected to the lattice structure of a high voltage transmission tower, a first and a second combined interruption and disconnection modules respectively including for each phase, a first and a second combined interruption and disconnection units, a first combined disconnecting and earthing switch having a first fixed contact operatively coupled to said first terminal, a second fixed contact at ground potential and a first movable contact operatively couplable to said first and second fixed contacts for disconnecting and earthing operations; a fast earthing switch interposed between said first fixed contact and said first terminal, a circuit breaker unit electrically connected to said first movable contact of said first combined disconnecting and earthing switch and to a second combined disconnecting and earthing switch.

First claim

The invention claimed is:

1. An arrangement comprising:
a high voltage transmission tower having a lattice structure; and
a tower mounted high voltage gas-insulated switchgear comprising:
a supporting structure within said lattice structure of said high voltage transmission tower; and
a plurality of gas-insulated combined interruption and disconnection modules including first and second gas-insulated combined interruption and disconnection modules, each of said gas-insulated combined interruption and disconnection modules comprising, for each phase:
a combined interruption and disconnection unit, each of said combined interruption and disconnection unit comprising a gas-tight casing developing along a reference axis and housing at least a terminal for at least an input/output connection or to an end user;
a first combined disconnecting and earthing switch having a first fixed contact operatively coupled to said first terminal of said at least said terminal, a second fixed contact at ground potential and a first movable contact operatively couplable to said first and second fixed contacts for disconnecting and earthing operations;
a second combined disconnecting and earthing switch, said second combined disconnecting and earthing switch having a third fixed contact operatively coupled to a second terminal of said at least said terminal, a fourth fixed contact at said ground potential and a second movable contact operatively couplable to said third and fourth fixed contacts for disconnecting and earthing operations,
a fast earthing switch interposed between said first fixed contact and said first terminal; and
a circuit breaker unit electrically connected to said first movable contact of said first combined disconnecting and earthing switch and to said second movable of said second combined disconnecting and earthing switch,

said first terminal of said first combined interruption and disconnection unit being electrically connected to a first electrical line of said at least said input/output connection, said first terminal of said second interruption and disconnection unit being electrically connected to a second electrical line of said at least said input/output connection, said second terminals of said first and second combined interruption and disconnection units being electrically coupled to each other, said high voltage gas-insulated switchgear being mounted on said supporting structure within said lattice structure of said high voltage transmission tower, and said reference axes of said gas-tight casings of said first and second gas-insulated combined interruption and disconnection modules being aligned in a same direction.

2. The arrangement according to claim 1 , wherein said first and second combined interruption and disconnection modules are positioned at a height within said lattice structure of said high voltage transmission tower.

3. The arrangement according to claim 1 , wherein said first and second combined interruption and disconnection modules are positioned within said lattice structure of said high voltage transmission tower in correspondence of a base of said high voltage transmission tower.

4. The arrangement according to claim 1 , wherein said reference axes of said gas-tight casings of said first and second gas-insulated combined interruption and disconnection modules are aligned along a common axis.

5. The arrangement according to claim 1 , wherein said reference axes of said gas-tight casings of said first and second gas-insulated combined interruption and disconnection modules are parallel to each other.

6. The arrangement according to claim 1 , further comprises a third combined interruption and disconnection module having a third terminal operatively connectable to an end user, and a fourth terminal electrically interposed between and connected to said first and second combined interruption and disconnection modules.

7. The arrangement according to claim 6 , wherein said third combined interruption and disconnection module is positioned within said lattice structure of said high voltage transmission tower at a same height of said first and second combined interruption and disconnection modules.

8. The arrangement according to claim 6 , wherein said third combined interruption and disconnection module is positioned within said lattice structure of said high voltage transmission tower at a different height with respect to said first and second combined interruption and disconnection modules.

9. The arrangement according to claim 1 , wherein said plurality of gas-insulated combined interruption and disconnection modules further includes a third combined interruption and disconnection module, said first terminal of said third combined interruption and disconnection unit being operatively connectable to said end user, and said second terminal of said third combined interruption and disconnection unit being electrically interposed between and connected to said first and second combined interruption and disconnection modules.

10. The arrangement according to claim 9 , wherein said reference axes of said gas-tight casings of said first, second, and third gas-insulated combined interruption and disconnection modules are parallel to each other.

11. The arrangement according to claim 9 , wherein said reference axes of said gas-tight casings of said first and second gas-insulated combined interruption and disconnection modules are aligned along a common axis, and said reference axis of said gas-tight casing said third gas-insulated combined interruption and disconnection module is substantially perpendicular to said reference axes of said gas-tight casings of said first and second gas-insulated combined interruption and disconnection modules.

12. The arrangement according to claim 11 , wherein said third combined interruption and disconnection module is positioned within said lattice structure of said high voltage transmission tower at a different height with respect to said first and second combined interruption and disconnection modules.

13. The arrangement according to claim 9 , wherein said reference axes of said gas-tight casings of said first, second, and third second gas-insulated combined interruption and disconnection modules are substantially vertical.

14. The arrangement according to claim 1 , wherein said reference axes of said gas-tight casings of said first and second gas-insulated combined interruption and disconnection modules are substantially horizontal.

15. A high voltage gas-insulated switchgear comprising:
a supporting structure configured to be connected to a lattice structure of a high voltage transmission tower; and
a first and a second gas-insulated combined interruption and disconnection modules, each of said first and second gas-insulated combined interruption and disconnection modules comprising, for each phase:
a combined interruption and disconnection unit, each of said combined interruption and disconnection unit comprising a gas-tight casing developing along a reference axis and housing at least a terminal for at least an input/output connection;
a first combined disconnecting and earthing switch having a first fixed contact operatively coupled to said first terminal of said at least said terminal, a second fixed contact at ground potential and a first movable contact operatively couplable to said first and second fixed contacts for disconnecting and earthing operations;
a second combined disconnecting and earthing switch, said second combined disconnecting and earthing switch having a third fixed contact operatively coupled to a second terminal of said at least said ter

Assignees

• Hitachi Energy Switzerland Ag

Inventors

• Cameroni Roberto
• Granata Carlo

Classifications

• H02B13/075 Primary

  Earthing arrangements · CPC title

• H02B3/00

  Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear · CPC title

• H02B5/06 Primary

  gas-insulated · CPC title

• H02B13/035

  Gas-insulated switchgear · CPC title

• H02B5/02

  mounted on pole, e.g. pole transformer substation · CPC title