Electrical Connection - Siemens SINAMICS S120 Equipment Manual

3.2.6

Electrical connection

Adjusting the fan voltage (-T10)
The power supply for the device fans (1-ph. 230 V AC) in the Power Module (-T10) is taken
from the line supply using transformers. The locations of the transformers are indicated in
the interface descriptions.
The transformers are fitted with primary taps so that they can be fine-tuned to the line supply
voltage. When delivered, the taps are always set to the highest level. With a low supply
voltage, the appropriate transformer tap must be activated.
The connections at the setting terminals must be connected to "0" and the line supply
voltage.
Figure 3-36
The supply voltage assignments for making the appropriate setting on the fan transformer
are indicated in the following table (factory presetting): 480 V/0 V)
Caution
If the terminals are not changed-over to reflect the actual line supply voltage:
• The required cooling level will not provided (risk of overheating)
• The fan fuses may blow (overload)
Table 3-21
Equipment Manual AC Drive
Manual, (GH6), 03/2006 Edition, 6SL3097-2AL00-0BP0
Setting terminals for the fan transformers
Assignment of the existing line supply voltage for setting at the fan transformer
Line supply voltage
380 V ± 10 %
400 V ± 10 %
440 V ± 10 %
480 V ± 10 %
3.2 Power Modules Chassis
Tap at the fan transformer (-T10)
380 V
400 V
440 V
480 V
Power Modules
3-53