Siemens SINAMICS S120 Commissioning Manual page 20

Preparations for Commissioning
1.1 Requirements for commissioning
The line-side and motor-side power cables must be dimensioned and routed in
accordance with the ambient and routing conditions. The maximum permissible cable
lengths between the converter and the motor must be observed depending on the type of
cables used.
The ground for the motor should be directly connected to the ground for the Motor
Module (short distance).
The cables must be properly connected with the correct torque to the component
terminals. The cables for the motor and low-voltage switchgear must also be connected
with the required torques.
The busbar/wiring for the DC connection between the infeed and the Motor Modules
must be checked with regard to the load and installation conditions. When more than one
motor is used, the total current of the DC connection must be observed.
The cables between the low-voltage switchgear and the power section must be protected
with line fuses for conductor protection (VDE 636, Part 10). Combined fuses are
recommended for conductor and semi-conductor protection (VDE 636, Part 40 / EN
60269-4). For information about the relevant fuses, see the catalog.
Ensure that measures are taken to relieve strain on the cables.
When EMC-shielded cables are used, screwed glands that connect the shield to ground
with the greatest possible surface area must be provided on the motor terminal box.
The cable shields must be connected as close to the conductor terminal connections as
possible to ensure a low-impedance connection with cabinet ground.
The cable shields must be properly applied and the cabinet properly grounded at the
appropriate points.
The connection voltage for the fans in the chassis components must be adapted
accordingly to the supply voltages by making the appropriate settings on the fan
transformers.
The connection bracket for the interference-suppression capacitor must be removed from
the infeeds for operation with an ungrounded supply.
The cabinet type plate can be used to ascertain the date of manufacture. If the period
from the date of manufacture to initial commissioning or the downtime of the power
components is less than two years, the DC link capacitors do not have to be reformed. If
the downtime period is longer than two years, they must be reformed in accordance with
the description in the "Maintenance and Servicing" chapter in the Equipment Manual.
With an external auxiliary supply, the cables must be connected in accordance with the
Equipment Manual.
Drive operation by higher-level controller/control room. The control cables must be
connected in accordance with the required interface configuration and the shield applied.
Taking into account electrical interference and the distance from power cables, the digital
and analog signals must be routed with separate cables.
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Activity
Commissioning Manual, (IH1), 07/2007 Edition, 6SL3097-2AF00-0BP7
O. K.
Commissioning