Switch-fuse module

Patent metadata

Field	Value
Publication number	US-11749976-B2
Application number	US-202217653592-A
Country	US
Kind code	B2
Filing date	Mar 4, 2022
Priority date	Mar 11, 2021
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

A switch-fuse module and a ring main unit. The switch-fuse module includes: a housing having therein a switch enclosure including an insulating gas and a cable compartment that is different and separate from the switch enclosure; at least one switch disconnector arranged within the switch enclosure; and at least one fuse canister with a vertically oriented longitudinal axis; wherein the fuse canister i) is adapted to receive a fuse, and ii) is arranged within the cable compartment, and the insulating gas has a global warming potential less than a global warming potential of SF6.

First claim

The invention claimed is:

1. A switch-fuse module comprising:
a housing having therein a switch enclosure comprising an insulating gas and a cable compartment that is different and separate from the switch enclosure;
at least one switch disconnector arranged within the switch enclosure; and
at least one fuse canister with a vertically oriented longitudinal axis;
wherein the fuse canister is adapted to receive a fuse and is arranged within the cable compartment, and
the insulating gas has a global warming potential less than a global warming potential of SF6.

2. The switch-fuse module according to claim 1 , wherein
the switch disconnector and the switch enclosure is arranged above the cable compartment; and the switch enclosure and the cable compartment are arranged adjacently.

3. The switch-fuse module according to claim 1 , wherein the switch enclosure is separated from the cable compartment by a step-shaped separating wall portion defining a lower volume portion of the switch enclosure and a horizontally adjacent upper volume portion of the cable compartment.

4. The switch-fuse module according to claim 3 , wherein the step-shaped separating wall portion of the switch enclosure forms a step-shaped or staircase-shaped indentation in a lower region of the switch enclosure, the cable compartment being partially placed in the step-shaped or staircase-shaped indentation.

5. The switch-fuse module according to claim 1 , wherein the fuse is electrically connected at a first end to the switch disconnector via an internal bushing passing from the switch enclosure into the cable compartment, and the fuse is electrically connected at a second end to one of a cable connection for connecting to an external cable.

6. The switch-fuse module according to claim 5 , further comprising
the cable connection is placed at a vertically higher position than the second end of the fuse, or at a vertically lower position than the first end of the fuse; and
the cable connection has a vertical height overlapping with the fuse.

7. The switch-fuse module according to claim 5 , wherein the switch enclosure is separated from the cable compartment by a step-shaped separating wall portion, the step-shaped separating wall portion having a vertical wall portion;
wherein the internal bushing traverses the vertical wall portion of the step-shaped separating wall portion.

8. The switch-fuse module according to claim 1 , wherein the fuse is configured to be accessible from a front of the switch-fuse module.

9. The switch-fuse module according to claim 1 , wherein the at least one fuse canister comprises three fuse canisters, each fuse canister receiving one fuse; and
wherein each fuse of the three fuse canisters is connected to one of three current phases.

10. The switch-fuse module according to claim 1 , wherein the switch disconnector is configured as a load-break switch.

11. The switch-fuse module according to claim 1 , wherein the insulating gas has a dielectric strength lower than a dielectric strength of SF6.

12. The switch-fuse module according to claim 1 , comprising a first earthing switch for earthing a second end of the fuse, a second earthing switch for earthing a first end of the fuse, and at least one earthing shaft for operating the first earthing switch and the second earthing switch.

13. The switch-fuse module according to claim 1 , wherein the switch enclosure and the cable compartment are spaced from each other at a first distance or separated from each other by an internal wall portion.

14. The switch-fuse module according to claim 1 , wherein the at least one fuse canister comprises three fuse canisters, each fuse canister being adapted to receive one fuse; and
wherein the fuses of the three fuse canisters are arranged substantially parallel to each other and are all arranged substantially at one vertical height, with no vertical offset to each other.

15. The switch-fuse module according to claim 1 , wherein the at least one fuse canister comprises a middle fuse canister and two peripheral fuse canisters, each fuse caniser being adapted to receive one fuse; and
wherein a longitudinal axis of the fuse of the middle fuse canister is laterally offset with respect to a longitudinal axis of the fuse of each peripheral fuse canister, or is arranged outside of a plane defined by the fuses of the peripheral fuse canisters.

16. The switch-fuse module according to claim 1 , wherein the switch disconnector is configured as a puffer switching device or vacuum interrupter.

17. The switch-fuse module according to claim 1 , wherein the cable compartment includes current and voltage sensors.

18. The switch-fuse module according to claim 1 , wherein the switch-fuse module is configured for a rated voltage in a range from 1 kV to 52 kV.

19. The switch-fuse module according to claim 1 , wherein the fuse canister is arranged at least partially within an upper volume portion of the cable compartment.

20. The switch-fuse module according to claim 1 , wherein the switch enclosure is isolated from the cable compartment such that the switch enclosure and the cable compartment are gas-tight with respect to each other.

21. The switch-fuse module according to claim 1 , wherein the cable compartment is different and separate from the switch enclosure such that a pressure condition in the cable compartment is separately controlled from a pressure condition in the switch enclosure.

22. A ring main unit comprising a switch fuse module including:
a housing having therein a switch enclosure comprising an insulating gas and a cable compartment that is different and separate from the switch enclosure;
at least one switch disconnector arranged within the switch enclosure; and
at least one fuse canister with a vertically oriented longitudinal axis;
wherein the fuse canister is adapted to receive a fuse and is arranged within the cable compartment, and
the insulating gas has a global warming potential less than a global warming potential of SF6.

Assignees

• Abb Schweiz Ag

Inventors

• Thingstad Pettersen Terje
• Rune West John
• Talmo Ståle
• Lohne Stanley
• Attar Elham

Classifications

• H02B13/035 Primary

  Gas-insulated switchgear · CPC title

• H01H33/56

  Gas reservoirs · CPC title

• H01H85/0026

  casings for the fuse and its base contacts · CPC title

• H02B5/06

  gas-insulated · CPC title

• H01H85/2045 Primary

  Mounting means or insulating parts of the base, e.g. covers, casings · CPC title