发明名称 |
SAFETY DEVICE FOR A POWER TRANSFORMER, AND RELATED POWER TRANSFORMER USING SUCH A SAFETY DEVICE |
摘要 |
A safety device is disclosed for a power transformer containing a cooling liquid, and can include a shaped body having an inner chamber which is suitable to be at least partially immersed in cooling liquid and inside which gas can accumulate; a first floating element and a second floating element suitable to be at least partially immersed in and moved by cooling liquid; and a switch suitable to be actuated by the first floating element when the gas accumulated is such that the level of the cooling liquid in the inner chamber reaches a predetermined first threshold level and by the second floating element when the gas accumulated is such that the level of the cooling liquid in the inner chamber reaches a lower predetermined second threshold level, respectively. The first and second floating elements can be mounted on and move linearly relative to one or more corresponding guiding supports. |
申请公布号 |
US2015131186(A1) |
申请公布日期 |
2015.05.14 |
申请号 |
US201514596697 |
申请日期 |
2015.01.14 |
申请人 |
ABB TECHNOLOGY AG |
发明人 |
Tonin Andrea;Carollo Carlo;Manco Giuseppe Leonardo |
分类号 |
H01H33/55;H01H36/02;H02H5/08;H01H35/40 |
主分类号 |
H01H33/55 |
代理机构 |
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代理人 |
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主权项 |
1. A safety device suitable to be associated with a power transformer containing a cooling liquid, the safety device comprising:
a shaped body having an inner chamber configured to be at least partially immersed in cooling liquid and inside which gas can accumulate; a first floating element and a second floating element configured to be at least partially immersed in and moved by cooling liquid; switching means for actuation by said first floating element when the gas accumulated is such that a level of cooling liquid in the inner chamber reaches a predetermined first threshold level, and by said second floating element when the gas accumulated is such that the level of said cooling liquid in the inner chamber reaches a lower predetermined second threshold level, respectively; and wherein said first floating element and said second floating element are mounted on and are configured to move linearly along a reference axis relative to one or more corresponding guiding supports. |
地址 |
Zurich CH |