Tonin Andrea,Carollo Carlo,Manco Giuseppe Leonardo
申请号：
US201514596697
公开号：
US9728357(B2)
申请日:
2015.01.14
申请国别(地区):
美国
年份:
2017
代理人:
Taft Stettinius & Hollister LLP
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.
