Siemens SINAMICS S120 Manual page 78

Electrical installation
4.6 Connections
Preparatory steps
● Install and secure the cabinet units properly.
● Disconnect the cabinet units from the power supply.
● Allow unimpeded access to the PE busbar of the cabinet units (if necessary, remove the
Figure 4-3
Establishing the connection
1. Loosen the 1 x M12 nut (1) of the PE busbar at the 1st cabinet.
2. Remove the nut (1), washer and screw (3).
3. Loosen the 1 x M12 nut of the PE busbar on the 2nd cabinet.
4. Remove the nut, washer, and screw.
5. Place the connection jumper (2) at the back on the PE busbar of the cabinet units to be
6. Insert the screws in the ground straps of the PE busbar from the front.
7. Reattach the washers and nuts.
8. Tighten the nuts (tightening torque: 50 Nm).
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protective covers during installation work).
Connecting the PE busbar when cabinet units are installed side-by-side
connected.
Cabinet Modules
Manual, 03/2013, A5E03263538A