Siemens SINAMICS S120 Equipment Manual page 137

A sufficiently high system fault level is required for tripping the fuses within the predefined
time in the event of a ground fault. The ratio between the system fault level and the rated
power of the Line Module must be ≥ 70. If the supply short circuit power is too low, the fuse
rupture times increase to an unacceptable level (e.g. fire is possible).
The Active Line Modules conduct a high leakage current via the PE conductor. Because of
the high leakage current of the Active Line Modules/Motor Modules, a permanent PE
connection of the Active Line Modules/Motor Modules or the control cabinet is required.
Furthermore, the following measures must be taken according to EN 61800-5-1:
Either protective ground conductor cross-sections ≥ 10 mm
protective ground conductor of the same cross-section as the first one.
A ventilation clearance of 80 mm above and below the components must be observed.
For the 80 kW and 120 kW Active Line Modules, a ventilation clearance of 50 mm must be
observed in front of the fan.
It is only permissible to establish connections to the DC link using the adapters that
SIEMENS has recommended (DC link adapter and DC link rectifier adapter).
The tightening torque of the DC link busbar screws (1.8 Nm, tolerance: +30 %) must be
checked before commissioning is carried out when the system is disconnected from the
power supply and the DC link is discharged. The screws must be tightened after
transportation.
For line supplies without regenerative feedback capability (e.g. diesel generator), the
regenerative feedback capability of the Active Line Module must be deactivated by means
of parameters (see Description of Functions). The braking energy must then be dissipated
via an additional Braking Module with a braking resistor in the drive line-up.
Booksize Power Units
Equipment Manual, (GH2), 07/2007, 6SL3097-2AC00-0BP5
DANGER
DANGER
WARNING
DANGER
CAUTION
3.2 Active Line Modules with internal air cooling
Cu or installation of a second
2
Line Modules Booksize
137