5.7 Connecting the grounding bars
DANGER
Danger due to failure of the protective and monitoring equipment
The converter must be grounded to ensure that it operates safely and reliably. If the converter
is operated with insufficient grounding, then the protection and monitoring functions can fail.
Death, serious injury, or material damage will result.
● Always apply all of the necessary protective measures.
● Always observe the five safety rules when working with the converter.
● Follow these steps when grounding the machine:
– Establish the connections in a cabinet.
– Ensure that the connections are also established over several cabinets.
– Establish the ground connection for the whole plant immediately.
If several cabinets are set up as one unit, they must be connected to each other. A connection
jumper is supplied with each cabinet. To screw several cabinets together, proceed as follows:
1. Loosen the M12 nut ① on the first cabinet. Remove the nut, the washer and the connection
jumper ②.
2. Loosen the M12 nut ① on the second cabinet. Remove the nut and the washer.
3. Place the connection jumper ② on the support for the connection jumper in the cabinets to
be connected.
4. Refit the washer and nut.
5. Tighten the nut (torque: 50 Nm).
① M12 nut; washer
② Connection jumper
Figure 5-3 Connecting cabinets
Installation
5.7 Connecting the grounding bars
SINAMICS SM150 6SL3845-2NN41-8AD2
Operating Instructions Rev.201910281310 EXAMPLE 79
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