Siemens SINAMICS PERFECT HARMONY GH180 - Page 285

of the input transformer. Voltage during pre-charge is monitored through the input attenuators
on the primary side of the transformer. The M1 contactor connects the MV source to the primary.
Note
Special Installations
Pre-charge inductors may replace the pre-charge capacitors in special installations.
The pre-charge contactors are controlled directly by the NXG code and require no SOP
interaction with the exception of the start pre-charge command.
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Figure 8-15 Type 6 Pre-charge Component Connections
Advanced Operating Functions
8.17 Synchronous Transfer
NXGPro+ Control Manual
Operating Manual, A5E50491925A 283