Operating An Active Line Module Chassis-2 On An Ungrounded Supply (It System) - Siemens SINAMICS S120 Manual

Line Modules
5.5 Active Line Modules Chassis-2
5.5.7 Operating an Active Line Module Chassis-2 on an ungrounded supply (IT
system)
When operating a Active Line Module Chassis-2 on an ungrounded line supply (IT line
system), an isolating transformer must be connected at terminal strip X51 upstream of the
fan power supply.
NOTICE
Damage to the device if an isolating transformer is not used when connected to an
ungrounded line supply
If, for an ungrounded line supply (IT line system), an isolating transformer is not connected
upstream of the fan power supply, then this can cause significant damage to the device.
• For an ungrounded line supply system (IT system), connect an isolating transformer
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upstream of the fan power supply.
Air-cooled chassis power units
Equipment Manual, 06/2020, 6SL3097-5AE00-0BP3