Siemens SINAMICS S120 Manual page 628

Accessories
11.4 DC link rectifier adapter for Booksize format
Fire hazard and device damage through ground fault / short-circuit
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.
• Use the local installation regulations to avoid this fault.
• Protect the cables against mechanical damage.
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.
• The total length of the DC link (including the connection cables) must not exceed 10 m.
Danger to life through electric shock due to incorrectly laid 24 V supply cables
If supply cables are laid without safe electrical separation, the insulation can fail with an
electric shock.
• Maintain a clearance of at least 100 mm between the 24 V supply cables and the DC
• Or use cables with double insulation (e.g. sheathed cables) for the 24 V supply cables.
Risk of fire as a result of incorrectly dimensioned overcurrent protection in the DC link
connecting cable
Incorrectly dimensioned overcurrent protective devices can result in a fire and associated
smoke.
• Protect personnel and prevent fires by dimensioning the overcurrent protective devices
• Comply with local installation regulations.
• Carefully check the overcurrent protection device to ensure that it functions perfectly,
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WARNING
WARNING
WARNING
link connecting cables.
WARNING
in the DC link connecting cable corresponding to the particular application.
and maintain it regularly in accordance with local installation regulations.
Booksize Power Units
Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8