Application Note| REACT-3.6/4.6-TL – BACKUP OUTPUT|Operation and Configuration 13
1.
External control signal cancelled (open contact)
Once it has left the backup mode, the inverter will check the conditions of the public mains network and,
after ensuring that Voltage and Frequency parameters are correct, it will start the reconnection sequence.
6.
Mode: Auto 2
In the Automatic 2 mode, the inverter may operate in backup if and only if the following condition exists:
1.
Power failure at the output terminals of the inverter (Voltage and Frequency values outside the
Mains OK range, established according to local standards).
If Mode 2 is set, the inverter will enter in backup mode in case of malfunction or power failure at general
level (system black-out) or in case of malfunction at inverter level (e.g. activation of protection devices al
inverter output).
Three possible schemes that can be designed and that describe the operation of this mode are shown
below:
Auto2: Backup operation due to activation of protection devices installed at inverter output (power failure at inverter output
terminals)
INPUT
CONDITION
S
