Siemens SINAMICS PERFECT HARMONY GH180 - Synchronous Transfer Operation Generator Options and Potential Fault Conditions; VFD Synchronous Transfer Implementation (L29)

8.17.2 VFD Synchronous Transfer Implementation (L29)
VFD Synchronous Transfer Implementation
Synchronous transfer is inherent to NXGPro+ control. To optimize this feature, Siemens
engineering must be involved, regardless of scope of supply, in the switchgear con󹪝guration and
logic sequencing for both equipment safety and personnel safety. Siemens engineering can
supply switchgear and reactors as part of the drive or provide recommendations as needed.
CAUTION
Potential damage to VFD Power Cells
The VFD output contactor and motor line contactors must never be simultaneously closed if
the digital output signal "VFD Transfer Permissive" is low, or when the VFD input is not
energized.
Failure to ensure that this condition does not occur could result in severe damage to the VFD
power cells.
8.17.3 Synchronous Transfer Operation Generator Options and Potential Fault
Conditions
Verifying Command Generator Options
Before attempting synchronous transfer, examine the command generator options selected
during pre-synchronous transfer. It is important to disable command generator functions that
may cause the transfer to fail.
Verify that the speed pro󹪝le, polarity change function, and speed limits do not modify the input
frequency when a synchronous transfer is requested. The input frequency is treated much the
same way as any other raw speed demand into the drive.
Advanced Operating Functions
8.17 Synchronous Transfer
NXGPro+ Control Manual
258 Operating Manual, A5E50491925A