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6.4.3
Connecting the grounding conductor
The grounding conductor cross-section of the motor must be in full conformance with the
installation specifications, e.g. in accordance with IEC 60034-1.
There is a hexagon bolt with a flat washer and a spring washer on the stator frame at the
designated connection point for the grounding conductor. The grounding conductor can be
connected as follows:
● With stranded cables with cable lugs
● With flat cables with cable end designed accordingly
As an alternative, you can connect the grounding conductor without cable lugs using a
clamping plate at the marked connection point.
Connecting the grounding conductor
● Use the connecting terminals designated for the grounding conductor in the terminal box.
● Ensure that the connecting surface is bare and is protected against corrosion using a
● Arrange the flat washer and spring washer under the screw head.
SIMOTICS FD 1LM1
Operating Instructions 01/2019
External conductor cross-section S
mm²
35
50
70
95
120
150
185
240
300
400
suitable substance, e.g. acid-free Vaseline.
Electrical connection
Grounding conductor cross-section
mm²
25
25
35
50
70
70
95
120
150
185
6.4 Preparation
77
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