WOGeneric TEAAC / 2008
Siemens AG Operating Instructions 1.03 1RQ671...-Z 25
Connection
6
6.1 Electrical connection
6.1.1 Grounding the motor
The cross-section of the machine grounding conductor must comply with the installation
regulations, e.g., in accordance with IEC/EN 60204-1, for phase conductor cross-sections
greater than 35 mm
2
, with a minimum of 50% of the-cross section of the phase conductor.
There is a hexagon bolt with flat and spring washer on the stator frame at the designated
connecting point for the grounding conductor. This is suitable for connecting multi-core
conductors with cable lugs or straps with appropriate conductor ends.
Connecting the grounding conductor
When making connections, ensure the following:
● The connecting surface is bare and is protected against corrosion using a suitable
substance, e.g., acid-free Vaseline
● The spring lock and spacer washer are located under the bolt head
● The maximum permissible clamping thickness of 10 mm for the cable lug or strap is not
exceeded
● The minimum required screw-in depth and the tightening torque for the clamping bolt as
given in the table below are observed
The screw-in depth and tightening torque differ depending on whether cable lugs or
ground terminals are used:
Table 6-1 Tightening torques of bolts (cable lug)
Bolt Screw-in depth Tightening torque
M12 x 25 > 16 mm 38 Nm
M16 x 35 > 20 mm 92 Nm
Table 6-2 Tightening torques of bolts (ground terminals)
Bolt Screw-in depth Tightening torque
M6 > 9 mm 8 Nm
M8 > 12 mm 20 Nm
M10 > 15 mm 40 Nm
[ID 22.01]
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