Connection of the Components
5.1 Power Supply Interface Variants
Guide for the SINUMERIK 840D sl machine configuring
Manual, 07/2006 Edition, 6FC5397-6CP10-0BA0
5-3
5.1.3 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
%.
Caution
To ensure protective separation an isolating transformer must be used for voltages greater
than 3-ph. AC 480 V AC +10 %.
Applications:
● The motor insulation must be protected from excessive voltages.
● The active line module must provide a stabilized DC link voltage. It can be in the range
380 V to 415 V.
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Figure 5-3 Autotransformer
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