Operation Of The Line Connection Components Via An Isolating Transformer - Siemens SINAMICS S120 Equipment Manual

2.8.4

Operation of the line connection components via an isolating transformer

The isolating transformer converts the network configuration of the system (e.g. IT/TT
system) to a TN system. Additional voltage adaptation to the permissible voltage tolerance
range is possible.
An isolating transformer must be used in the following cases:
• The insulation of the Motor Module and/or the motor is not suitable for the voltages that
• There is no compatibility with an existing residual-current protective device.
• The installation altitude is higher than 2000 m above sea level.
• A line filter should be used in a line supply system that is not a TN line supply system with
Caution
If the supply voltage is greater than 480 V +10%, an autotransformer must not be used.
An isolating transformer must be used to ensure safe electrical separation.
Equipment Manual for Booksize Power Units
Equipment Manual, (GH2), 03/2006 Edition, 6SL3097-2AC00-0BP3
occur.
grounded neutral conductor.
Line Connection Booksize
2.8 Line connection variations
2-33