At present

high voltage power capacitor with for small-capacity can

due to its small heat

sufficiently keep the temperature rise of the capacitor within the permitted range by the surface heat dissipation on self-container itself. At the same time

the increase and decrease of volume inside the container due to increase and decrease of temperature can also be compensated by the expansion and shrinkage of the container. For high-capacity capacitor

the surface heat dissipation of the container is insufficient to control the temperature rise of the capacitor within the permitted range due to its big heat and radiator is needed to be installed. At the same time

the adoption of thick steel sheet can meet strength requirement due to large capacity and volume. However

thick steel sheer container is not easy to be deformation and it is therefore difficult to compensate the variation of internal liquid volume with the temperature

installation of expander or oil storage cabinet is necessary. No matter the radiator

oil storage cabinet or expander is added

the reliability of these radiators are not high due to multiple welding point and complicated manufacturing process.For solving above shortcomings of high capacity capacitor

a kind of new radiation device is proposed in this paper

which has the function of not radiator

but also of oil storage container or expander and can replace them