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US 2016/0107795 A1Published application
Tank for electrical equipment
AssigneeABB Technology AG
InventorSamuel Brodeur
Life of this patent
Estimating the term…
Abstract
A tank for electrical equipment such as power transformers and shunt reactors has integral stiffeners for reinforcing the tank during overpressure conditions, such as during an arc fault. The stiffeners are formed of a material that is more ductile than the material to which the stiffeners are attached, such as the tank walls and cover. The tank with integral stiffeners allows for expansion of the internal volume of the tank during overpressure conditions, thus, increasing the flexibility of the tank and mitigating the risk of tank rupture.
Claims20
A power transformer, comprising:
- a core having at least one core limb extending between upper and lower yokes;
- a coil winding mounted to said at least one core limb;
- an insulating medium;
- a tank having a cover, bottom and side walls, said core, coil winding and insulating medium disposed in an internal space of said tank, said tank having at least one stiffener joined at predetermined positions to corresponding outer surfaces of said tank side walls, said at least one stiffener formed of a material that has a yield stress value that is lower than or equal to the yield stress value of the material used to form the tank walls, said at least one stiffener absorbing arc energy from the insulating medium when said arc energy is transferred from the internal space of said tank to said stiffeners.
1 more element
A tank for electrical equipment, comprising:
- a bottom wall, side walls, and a cover, said cover joined to said side walls;
- and
- a plurality of stiffeners attached at predetermined positions to corresponding outer surfaces of said side walls, said stiffeners formed from a material having a measured yield stress value that is lower than or equal to the measured yield stress value of the material used to form the tank walls.
Dependencies are inferred from the claim text.