Tightening Torques for Terminal Screws
Type of Line Current Terminal
(also see Figure 5-22)
Voltage Terminal with
Spring-Loaded Terminals
(also see Figure 5-22)
Voltage Terminal with
Screw Connection
(also see Figure 5-23)
Stranded wires with ring-
type lug
2.7 Nm No ring-type lug No ring-type lug
Stranded wires with boot-
lace ferrules or pin-type
lugs
2.7 Nm 1.0 Nm 0.6 Nm
Solid conductor, bare
(2 mm
2
)
2.0 Nm 1.0 Nm –
NOTE
Use copper cables only.
Torques for Other Screw Types
Screw Type Torque
M4 x 20 1.2 Nm
M4 x 8 1.2 Nm
M2.5 x 6 0.39 Nm
Countersunk screw, M2.5 x 6 0.39 Nm
Countersunk screw, M2.5 x 8 0.39 Nm
Collar screw, M4 x 20 0.7 Nm
Technical Data
6.13 Design Data
SIPROTEC 5, Hardware Description, Manual 213
C53000-G5040-C002-C, Edition 10.2017
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