Tightening Torques Of Fastening Screws - Siemens SIPROTEC 5 Operation Manual

Tightening Torques of Fastening Screws

3.2.5
Tightening Torques for Terminal Screws
Type of Line
Litz wire with ring-type lug
Stranded wires with bootlace ferrules
or pin-type lugs
Solid conductor, bare (2 mm
NOTE
i
i
Make sure that the cables and lines of extra-low voltage circuits are laid sufficiently far away from power
network circuits.
Torques for Other Screw Types
Screw Type
M4 x 20
M4 x 8
M2.5 x 6
Countersunk screw, M2.5 x 6
Countersunk screw, M2.5 x 8
Collar screw, M4 x 20
SIPROTEC 5, Operation, Manual
C53000-G5040-C003-7, Edition 06.2016
3.2 Surface-Mounting Devices with Integrated On-Site Operation Panel
Current Voltage Terminal with
Terminal Spring-Loaded Terminals
2.7 Nm No ring-type lug
2.7 Nm 1.0 Nm
2.0 Nm 1.0 Nm
2 )
Torque
1.2 Nm
1.2 Nm
0.39 Nm
0.39 Nm
0.39 Nm
0.7 Nm
Fitting the Devices
Voltage Terminal with
Screw Connection
No ring-type lug
0.6 Nm
–
39