Siemens SINAMICS S120 Manual page 235

Fuse adaptation (-Q2) for transformer (-T2)
Two LV HRC fuses (-Q2:-F1/-F2) are installed upstream of the transformer (-T2) to protect it.
Fuses rated for a line supply of between 500 V to 690 V are fitted at the factory. For supply
voltages in the range from 380 V to 480 V, the customer must replace the fuses on the plant
side. The required fuses are supplied as accessories with the Auxiliary Power Supply
Module.
CAUTION
If the customer fails to replace the fuses when the system is connected to a supply voltage
in the 380 to 480 V range, there is a risk of fuse overloading in the low voltage range (380 V
to 480 V) so that the fuses will need to be replaced by new ones.
It is essential to disconnect the unit from the power supply while the fuses are being
replaced.
Note
A fuse grip must always be used to replace the fuses.
If necessary, the fuse grip can be ordered from Siemens.
Table 5- 52
Auxiliary Power Supply Module
Order no. 6SL3700-
LV HRC fuse for voltage range 380 to 480 V 3 AC
Fuse protection in A
Fuse MLFB
LV HRC fuse for voltage range 500 to 690 V 3 AC (fitted at factory)
Fuse protection in A
Fuse MLFB
Cabinet Modules
Manual, (GH5), 05/2010, A5E03263538A
WARNING
Overview of fuses for the transformer (-T2) in the Auxiliary Power Supply Module
0MX14-0AA3 0MX16-3AA3
gG 20 gG 25
3NA3807-6 3NA3810-6
gG 16 gG 20
3NA3805-6 3NA3807-6
Cabinet Modules
5.8 Auxiliary Power Supply Modules
0MX21-0AA3 0MX21-4AA3
gG 35 gG 50
3NA3814-6 3NA3820-6
gG 32 gG 40
3NA3812-6 3NA3817-6
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