three-pole design
rated voltage 25 and 38.5 kV
rated current 400 and 630 A

At the moment of delivery the disconnectors are equipped with supporting insulators made of cycloaliphatic resin or porcelain. Another equipment to these devices is: hand-operated drive mechanisms, motor operated drives, auxiliary contacts and fuses.
The type FTr (6400 and 6410) disconnectors are delivered either without or with earthing switch, with mechanical interlocking.
In its bottom part the FTr ...-SU (6410) type disconnector incorporates fuse holders for MV fuses.