Connection system
6.4 Connecting-up information
1PH7 induction motors (Machine tools)
Configuration Manual, (APH7W), 04/2009, 6SN1197-0AD72-0BP0
217
After connecting-up, the following points should be checked/tested
● The inside of the terminal box must be clean and free of any cable pieces
● All of the terminal screws must be tight
● The minimum air distances must be maintained
● The cable glands must be reliably sealed
● Unused cable glands must be closed and the plugs must be tightly screwed in place
● All of the sealing surfaces must be in a perfect condition
Connecting the ground conductor
The ground conductor cross-section must be in full conformance with the installation
regulations, e.g. acc. to IEC/EN 60204-1.
For shaft height 225, the ground conductor must be additionally connected to the motor
bearing shield. There is a terminal lug for the ground cable at the designated connection
point. This is suitable for connecting multi-conductor cables with cable lugs or flat cables with
the appropriately prepared conductor end.
Please note the following when connecting-up:
● The connecting surface must be bare and must be protected against corrosion using a
suitable medium, e.g. with acid-free Vaseline
● There is a spring washer and normal washer underneath the screw head
● The minimum necessary screw-in depth and the tightening torque for the clamping bolts
must be maintained
Table 6- 4 Screw-in depth and tightening torque
Screw Penetration depth: Tightening torque
M8 x 30 > 8 mm 20 Nm
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