Clamps for substations are built in aluminium alloy for pure aluminium, ACSR and aluminiun alloies conductors; while those for copper conductors are built in bronze aluminium.
Screws, nuts and lock washers are in stainless steel.
Bi-metallic combination is made through interposition of an “Elettrocupal” lock washers among pieces of different alloy, in order to avoid the electrolytic couple.
TIGHTENING TORQUES OF SUBSTATION CLAMPS
Stainless steel bolt
Tightening torque [Nm]
RAITED CURRENT OF SUBSTATION CLAMPS
Raited current [A]