S120 Combi Power Modules
4.2 Safety instructions for Combi Power Modules
SINAMICS S120 Combi
66 Manual, 11/2017, 6SL3097-4AV00-0BP7
Fire 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 power cables (motor feeder cables etc.) must not exceed 175 m.
Fire and damage to devices during operation without a line reactor
Operating a system without a line reactor can trigger a fire with smoke development.
• Do not operate the system without a line reactor.
Material damage due to loose power connections
Insufficient tightening torques or vibrations can result in faulty electrical connections. This
can cause fire damage or malfunctions.
• Tighten all the DC-link busbar screws with the specified tightening torques (1.8 Nm,
tolerance +30%).
• Check the tightening torques of all power connections at regular intervals and tighten
them when required. This applies in particular after transport.
Damage through use of incorrect DRIVE-CLiQ cables
Damage or malfunctions can occur on the devices or the system when incorrect or
unreleased DRIVE-CLiQ cables are used.
• Only use suitable DRIVE-CLiQ cables that have been approved by Siemens for the
particular application.
Note
Operation on line supplies where energy recovery is not possible
In line supply systems without energy recovery capability (e.g. a diesel generator), device
faults can occur due to a lack of dissipation of braking energy.
Deactivate the energy recovery capability of the Smart Line Modules using the
corresponding parameter (see the SINAMICS S120/S150 List Manual).
The braking energy must then be dissipated via an additional Braking Module with
braking resistor in the drive line-up.
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