Connecting The Pe Busbar When Cabinet Units Are Installed Side-By-Side - Siemens SINAMICS S120 Equipment Manual

Electrical installation
4.5 Connections
4.5.1.2

Connecting the PE busbar when cabinet units are installed side-by-side

A connection jumper for the PE busbar is supplied with every cabinet.
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
Establishing the connection
1. Loosen the single M12 nut of the PE busbar on the first cabinet.
2. Remove the nut, washer (1), and screw (3).
3. Loosen the single M12 nut of the PE busbar on the second 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).
58
protective covers).
Figure 4-6 Connecting the PE busbar when cabinet units are installed side-by-side
connected.
S120 Cabinet Modules Equipment Manual
Manual, (GH5), 10/2008, A5E00427098A