Line Supply Connection Conditions For Booksize Line Modules - Siemens SINAMICS S120 Engineering Manual

1 Engineering SINAMICS S120 Booksize
1.3.2

Line supply connection conditions for Booksize Line Modules

1.3.2.1 Transformer design for connecting Booksize Line Modules to the line
supply
A transformer should be used for connecting Booksize Line Modules to the line
supply. The following diagram shows connecting a Booksize Active Line Module to
an isolation transformer as example:
Fig. 1-2
Two important constraints must be taken into consideration when selecting the
correct transformer.
1. The relative short-circuit power at the Line Module connection point
2. The minimum rated transformer power taking into consideration the
supplementary transformer losses as a result of line-side harmonic currents
Engineering manual S120 Booksize
Entry-ID: 109808992, V1.0,
L1
L2
L3
PE
Fuses
Isol atio n
transfo rme r
Fuses
Line
disconnection
device
Basic L ine
Filte r (o ptio nal)
PE
Acti ve
Inte rface
Module
W2 V2 U2
04/2022
DCP
Acti ve Line Modu le
DCN
7