SF6 outdoor load break switch

SF6 outdoor load break switch RI6 Range and RI6M motorized version.

24 kV - 400÷630 A - 12,5÷16 kA

The SF6 load break switches type RI 6 are designed to be outdoor mounted on pole; they are suitable for rated current conduction, short circuit current set up, rated current breaking and medium voltage lines
Standard version is foreseen both for vertical and horizontal installation.
No maintenance is required and it has an extimated life-cycle of 30 years.

Manufacturing characteristics

Manufacturing technology is about the use of SF6, as insulating and breaking agent. Sulfur Hexafluoride, a non toxic, non flammable, inert gas, is known for its highly dielectric characteristics and its high thermal
conduction properties which allows it a quick arc estinguishment. The load break switch is made of double sectioning rotating moving contact, which guarantees the reliability of dielectric withstand and the
load break switch in open position.

Active parts are inside a metallic enclosure, made by stainless steel (sealed proof and life-time guaranteed according toCEI EN / IEC 62271-103 and 62271-1 standards) for which no fill-up is needed.
An over-pressure valve is placed in the lower part of the enclosure, which guarantees the gas exit in case of any accidental pressure increase over 2,5 bar, with further safety status of the apparatus.
The capacity of the container is 70 litres with working pressure of 0,35 bar (or 135 KPa as absolute value).

Six bushings are mounted on the metallic enclosure, which is filled with SF6 gas; they are used for power conduction cables connection.

Bushings are made of epoxy resin, with outside silicone rubber wings; they have been tested through electro-environmental accelerating ageing process (5000 hours according to IEC 1109).