Siemens Sinamics S120 Manual page 666

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11.5 DC link adapter

Risk of fire and damage to equipment due to short-circuit /ground fault

The DC-link connection cables must be laid so that a ground fault or short-circuit is

impossible. A ground fault can cause a fire with smoke development.

• Protect the cables against mechanical damage.

• Use the local installation regulations to avoid this fault.

Also implement one of the following measures:

• Use cables with double insulation.

• Maintain adequate clearance, e.g. by using spacers.

• Lay the cables in separate cable ducts or conduits.

Fire hazard due to overheating when permissible cable lengths are exceeded

Excessively long cable lengths can cause components to overheat with the associated risk

of fire and development of smoke.

• Ensure that the total length of the DC link including the connecting cables does not

Material damage due to loose power connections

Insufficient tightening torques or vibration can result in faulty electrical connections. This

can cause fire damage or malfunctions.

• Tighten all power connections with the specified tightening torques, e.g. line supply

• Check the tightening torques of all power connections at regular intervals and tighten

exceed 10 m.

connection, motor connection, DC-link connections.

them when required. This applies in particular after transport.

Booksize Power Units

Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6