Operating Line Connection Components Via An Autotransformer - Siemens SINAMICS S120 Combi Equipment Manual

Line-side power components
3.8 Line connection versions
S
n1
The matching transformer requires a rated power S
of 1%.
Note
S
n2
above, the power drawn from other loads has not been taken into account.
3.8.3.4

Operating line connection components via an autotransformer

An autotransformer can be used to adapt the voltage in the range up to 3-ph. 480 V AC 10
%.
Danger to life through electric shock due to high voltage
If the voltage applied is too high for the existing insulation, there is a danger of electric
shock.
• Use an isolating transformer for voltages from 3-ph. 480 V + 10 %.
NOTICE
Damage when using an autotransformer
If an autotransformer is used, safe electrical separation is no longer possible for a line
voltage higher than 480 V +10 %. This can lead to damage or a fault in the device.
• In this case, use an isolation transformer.
62
> S ⇒ S is decisive
n2 n1
for the matching transformer can be reduced by reducing u
WARNING
of 21 kVA for a short-circuit voltage u
n
. In the examples listed
k
SINAMICS S120 Combi
Manual, (GH9), 07/2016, 6SL3097-4AV00-0BP5
k