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Fitting the Devices
3.4 SIPROTEC 5 Compact
Grounding an On-Site Operation Panel
Join several on-site operation panels to one another with firm contact.
²
Siemens recommends the use of contact washers on painted metal assembly walls. If the assembly wall is
not metallic, place a metal layer, for example a metal sheet, between the assembly wall and the on-site
operation panels. Then connect this sheet to the system ground.
Tightening Torques of Fastening Screws
3.4.4
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
72
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
Voltage Terminal with
Screw Connection
No ring-type lug
0.6 Nm
–
SIPROTEC 5, Operation, Manual
C53000-G5040-C003-J, Edition 07.2022
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