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Subsea fuse assembly

a fuse assembly and subsea technology, applied in the direction of electric switches, electrical equipment, emergency protection devices, etc., can solve the problems of high cost, high cost of subsea applications, and the solution of providing a fuse is very cost-intensive, and achieves the effect of low cost and light weigh

Inactive Publication Date: 2015-03-17
SIEMENS ENERGY AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]A fuse for subsea applications that is compact and comparatively light weight is to be provided. The fuse is to be capable of being operated in a pressurized environment (e.g., a dielectric liquid environment). It would be beneficial if the fuse may be manufactured at comparatively low cost.

Problems solved by technology

At currents above the rated current, the fuse element melts, thereby interrupting the electrical circuit.
This solution of providing a fuse for a subsea application is very cost intensive due to the canister and the penetrators and further uses a considerable amount of space.
The canister is also very heavy.
Standard fuses may be incompatible with such an environment.
The fuse will still be capable of breaking a current when triggered, but this will cause an explosion inside the fuse, which may be detrimental to other electric components (e.g., due to a shockwave or shrapnel).
The combustion products of the explosion may contaminate the surrounding dielectric liquid severely.
This may cause failures in other components exposed to the dielectric liquid.

Method used

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Examples

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Embodiment Construction

[0048]In the following, embodiments will be described in detail with reference to the accompanying drawings. The following description of the embodiments is given only for the purpose of illustration and is not to be taken in a limiting sense.

[0049]The drawings are to be regarded as being schematic representations only, and elements in the drawings are not necessarily to scale with each other. Rather, the representation of the various elements is chosen such that their function in general purpose becomes apparent to a person skilled in the art.

[0050]FIG. 1 shows one embodiment of a subsea fuse assembly 10 including an enclosure 11. As illustrated in FIG. 2, the enclosure 11 has two openings 41 (one of which is not visible due to the perspective), through which electric conductors 17, 18 pass into the enclosure 11. The subsea fuse assembly 10 also includes a larger opening 40, towards which a pressure compensator 20 is mounted. Openings 41 are sealed by penetrators 15 and 16 (e.g., t...

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PUM

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Abstract

A subsea fuse assembly is provided. The subsea fuse assembly is adapted to be operated in a pressurized environment. The subsea fuse assembly includes an enclosure adapted to be filled with a dielectric liquid, and a pressure compensator including a flexible element for pressure compensation. The subsea fuse assembly also includes a first penetrator and a second penetrator each passing through a wall of the enclosure for leading a first electric conductor and a second electric conductor, respectively, into the enclosure. The subsea fuse assembly includes a fuse arranged inside the enclosure and connected between the first electric conductor and the second electric conductor.

Description

[0001]The present patent document is a §371 nationalization of PCT Application Serial Number PCT / EP2012 / 052966, filed Feb. 22, 2012, designating the United States, which is hereby incorporated by reference. This patent document also claims the benefit of EP11156594, filed on Mar. 2, 2011, which is also hereby incorporated by reference.FIELD[0002]The invention relates to a subsea fuse assembly adapted to be operated in a pressurized environment and to an electric device comprising such fuse assembly.BACKGROUND[0003]Oil platforms may be used in offshore oil and gas production. In the operation of offshore oil platforms, electronics may be installed under water (e.g., for controlling functions of a subsea Christmas tree or a subsea blowout preventer). More recently, subsea processing facilities are being established in which processing equipment such as electrically driven pumps and gas compressors are relocated to the ocean floor. The subsea processing facility may require a power gri...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H01H85/165H01H85/18H01H9/02H01H85/00H01H85/175H01H85/40H01H85/02
CPCH01H9/02H01H85/0021H01H85/0026H01H85/175H01H85/40H01H85/0241
Inventor BOE, OVEELIASSEN, SIVERTHAUGAN, ESPENLENES, ODDVARSNEISEN, BOERGESNILSBERG, GUNNAR
Owner SIEMENS ENERGY AS