MGE UPS Systems GALAXY PW 225KVA - Manual (Page 52)

4.2.2 Operation with the Normal AC Source Down
In the event of a normal AC source failure or voltage outside specified tolerances of ±10% in amplitude (±15%
optionally), the rectifier/charger (A) stops and the battery (D) supplies the necessary backup power to the load via
the inverter (B).
The battery, float-connected between the rectifier/charger and the inverter, discharges during this operating mode:
◗ lights 2 , 4 and 5 shine green.
The user is warned of battery operation by the slow beeping of the buzzer 6 , see Figure 4-6, and the message
"LOAD PROTECTED, BATTERY DISCHARGING", followed by the remaining backup time and the percent load.
This information is also available via volt-free changeover contacts for remote control devices.
Figure 4-6: Normal AC Source Indicator Diagram.
2
1
4 5 2
1
2
AB
C
D
Galaxy PW™ UPS 100 to 225kVA
Operation 4 — 4 86-133060-00 A00