Pressure relief device for a power transformer, and related power transformer

摘要

A pressure relief device (100) suitable to be connected to a power transformer comprising:
a connection flange (1) which is provided with a through opening (2), and is suitable to be connected to a mounting part of a power transformer;
- an end cap (3) which is spaced apart from the connection flange (1);
- a valve element which is displaceable between a first position where it is suitable to at least partially close the through opening (2) and a second position where it is spaced away from the through opening (2);
- at least one elastic element (15) which is operatively connected to the valve element (4) so as to urge it towards the first position; and
- connection means (10) operatively connecting the valve element (4) to at least one of the connection flange (1) and the end cap (3).
The connection means (10) are arranged so as to guide the valve element (4) along a predetermined path when it moves between the first and second positions.