Power distribution transformer and tank therefor
AssigneesHitachi Industrial Equipment Systems Co., Ltd., Nippon Steel & Sumikin Stainless Steel Corporation
InventorsMasao Hosokawa, Mitsuaki Kawashima, Kazuyuki Fukui, Kouji Yamashita, Izumi Muto, Eiichiro Ishimaru, Hiroshige Inoue
Life of this patent
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Abstract
Disclosed is a power distribution transformer having a body of the transformer, the body consisting of a coil and an iron core; a tank containing the body of the transformer and an insulation substance which fills an inner space of the tank; and an upper lid of the tank. The tank and/or the upper lid is made of a ferritic stainless steel.
Claims26
A power distribution transformer comprising a body of the transformer, the body consisting of a coil and an iron core;
- a tank containing the body of the transformer and an insulation substance which fills an inner space of the tank;
- and
- an upper lid of the tank,
- wherein the tank and the upper lid are made of a ferritic stainless steel having characteristics of not less than 30% elongation after fracture when subjected to uniaxial stretching, not less than 1.1 of the Lankford value (r value), a Vickers hardness (Hv) of not more than 175, and a yield ratio (YR) of not more than 80%, and
- wherein an outer surface of the tank is provided with a paint film.
A tank of a power distribution transformer, in which a body of the transformer, the body consisting of a coil and an iron core, is contained, and an insulation substance is filled in the inner chamber of the tank containing body of the transformer, and an upper lid, wherein the tank and the upper lid are made of a ferritic stainless steel having characteristics of not less than 30% elongation after fracture when subjected to uniaxial stretching, not less than 1.1 of the Lankford value (r value), a Vickers hardness (Hv) of not more than 175, and a yield ratio (YR) of not more than 80%, and wherein an outer surface of the tank is provided with a paint film.
Dependencies are inferred from the claim text.