Delta Electronics NH Plus Series

2
Η
Operation
2-2
When a power event (blackout, transient, surge, fluctuation…) occurs, the UPS will
automatically transfer from normal mode to backup mode. The battery will provide
emergency power to the inverter and then to the loads (Refer to Fig. 2-2).
2-3 Bypass Mode (Single Installation)
Fig. 2-3 Bypass Mode (Single)
When the inverter encounters abnormal situations (such as over temperature, long-time
overload, output short, abnormal output voltage and battery exhausted problems), the
inverter will shut down. If the UPS detects the bypass power is normal, then it will
automatically transfer to bypass mode to make sure the supply to the loads. After
abnormal situations are eliminated, UPS will transfer back to the normal mode
immediately (Refer to Fig. 2-3).