Connecting The Grounding Conductor - Siemens SIMOTICS XP 1MB5 Operating Instructions Manual

Electrical connection
6.6 Grounding conductor
6.6.1

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 suitable
substance, e.g. acid-free Vaseline.
• Arrange the spring washer and flat washer (if available) under the screw head.
80
External conductor cross-section S
mm²
35
50
70
95
120
150
185
240
300
400
Grounding conductor cross-section
mm²
25
25
35
50
70
70
95
120
150
185
1MB5 shaft height 400/450
Operating Instructions, 04/2023, A5E52802354A