6.3.2 Grounding connection type
Type of enclosure grounding Conductor cross-sec‐
tion
mm²
Connection of an individual conductor under the
external grounding bracket.
… 10
Connection is made using a DIN cable lug under
the external grounding bracket. DIN 46 234
… 25
Internal ground terminal
Comply with the following instructions when connecting up:
• Ensure that the connecting surface is bare and is protected against corrosion using a suitable
substance, e.g. acid-free Vaseline.
• Arrange the spring lock washer under the screw head.
• Locate the cable lug under the clamping bracket.
• Use the terminals designated for the grounding conductor in the terminal box.
• Observe the tightening torque (Page170) for the locking screw.
External ground terminal
Comply with the following instructions when connecting up:
• Ensure that the connecting surface is bare and is protected against corrosion using a suitable
substance, e.g. acid-free Vaseline.
• Locate the cable lug between the contact bracket and the grounding bracket; do not remove
the contact bracket pressed into the enclosure.
• Arrange the at washer and spring washer under the bolt head.
• Use the marked connection location for the grounding conductor on the stator housing.
• Observe the tightening torque (Page170) for the locking screw.
Shaft height Thread size for the grounding conductor
63 ... 160 1 x M5
180 1 x M6
200 2 x M6
Electrical connection
6.3Connecting the grounding conductor
1MB..1/2/3/4 - shaft heights 63 ... 355
86 Operating Instructions, 11/2023, A5E52779900A
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