User manual

Single phase input / single phase output configuration.
Fig. 21. Block diagram for the «Backfeed protection» application, for the different configurations.
Three phase input / single phase output configuration.
Before working on this circuit.
- Isolate Uninterruptible Power System (UPS).
- Then check for Hazardous Voltage between all
terminals including the protective earth.
Risk of Voltage Backfeed.