The “T” fixed point is permanently mounted on a rigid round conductors in order to improve the montage conditions of the phase clamps and to mark the place of the installation for earthing devices. There are two sizes of “T” fixed point.
Nominal short-circuiting current for t = 1s Isc (kA)
Nominal peak currrent for t = 0,02 s Isd (kA)
Nominal diameters of the rigid conductors ØD (mm)