Figure 3-3 Detailed View: Connecting Points For Ground Conductor (1 + 2) - Siemens 1PH728 Series Operating Instructions Manual

Connecting
Connect the ground conductor to the end shield of the motor. For this purpose, a
clamping lug is provided at the appropriately marked connecting point for the
ground conductor (1 + 2). This lug is suitable for connecting stranded conductors
with cable lugs or ribbon cables with appropriately shaped conductor end.

Figure 3-3 Detailed view: Connecting points for ground conductor (1 + 2)

When making connections, ensure that
•= the contact surface is clean and bright, and is protected with a suitable anti-
corrosion agent, e. g. acid-free Vaseline.
•= the flat and spring washers are located under the bolt head.
•= the minimum necessary screw-in depth and the tightening torque for the
clamping bolts must be maintained.
These are:
M8 x 30
SIEMENS AG - Operating Instructions
Three-phase induction motor 1PH728.
Bolt (*)
>8 mm
Screw-in depth
20 Nm
Installation / Assembly
1
2
Tightening torque
3-9