System Bypass - ABB HiPerGuard MV UPS User Manual

O P E R AT I O N
Figure 8.7: MV UPS (hard parallel) operating in Power Conditioning Mode
8.3.

System Bypass

The system can be bypassed from the GDM, Modbus TCP or digital I/O.
If the System Stop button is pushed on the GDM and the MV UPS is in Independent mode or the utility
voltage is not within acceptable limits, the system will ask the operator to confirm or abort the request.
In case of confirmation, the MV UPS will close the bypass and open S and S for each MV UPS block.
out in
For single machine commands (HMI, Digital IO or Modbus), the single machine logic will apply, but the
bypass will only be opened when insufficient MV UPS blocks are online to support the load (parameter
configured).
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