Connecting The Ground; Connection According To The System-Side Grounding Concept; Connecting External Cables To The Pe Busbar - Siemens SINAMICS S120 Operating Instructions Manual

Electrical connection
5.3 Connection
5.3.4

Connecting the ground

Each cabinet contains a PE busbar for grounding the components installed in the cabinet. The
nickel-plated busbars is located in the lower section of the cabinet and is secured at the left
and right to the ground straps in the cabinet.
Note
Close the cabinet doors
When ground connections are connected to the PE busbar, it must be ensured that the cabinet
doors can still be closed.
5.3.4.1

Connection according to the system-side grounding concept

Electric shock if there is no ground connection
If there is no connection to the central grounding of the complete plant, the cabinet unit may
be at a dangerous voltage level in a fault situation. This means that when touched, this can
result in death or severe injury.
Ground the device in compliance with the applicable regulations.
5.3.4.2

Connecting external cables to the PE busbar

Establishing the connection
1. Insert the screw from the front.
2. Attach the cable lug from the rear.
3. Attach the nut and, if necessary, the washers and tighten
(tightening torque: 50 Nm).
Note
Close the cabinet doors
When external cables that are to be connected to the PE busbar have been laid, make sure
that the cabinet doors close properly.
84
WARNING
Applications for Cabinet Modules, liquid cooled
Operating Instructions, 04/2015, A5E35974555A