UPStation GXT 3x1
Chapter 4 - Operating modes
(06/02)
Page 13
4
OPERATING MODES
4.1
Introduction
4.1.1
Normal mode operation- UPS mode
During normal operation, mains power provides energy to the UPS. The filters, the power factor correction circuit and
the inverter process this power to provide computer grade power to connected
loads. The UPS maintains the batteries in a fully charged state.
The four green LED’s indicate an approximate level of load in 25%
increments. If the UPS becomes loaded beyond full rating, the fifth (amber)
LED indicator will illuminate and sound an alarm.
The display template indicates the percentage of load on the UPS output.
4.1.2
Battery mode operation
Battery mode occurs in event of an extreme input voltage condition or complete mains failure. The battery system
supplies power through the Rectifier/PFC to the inverter to generate power for the connected load.
During battery mode the AC Input LED will extinguish, and the Battery LED
will illuminate to warn that a mains problem has occurred. An alarm will sound
every 10 seconds. This will change to 2 beeps every 5 seconds when battery runs
low (approximately 2 minutes remaining). Each load/battery level indicator
represents a 20% capacity level. As capacity decreases, fewer indicators remain
illuminated. Refer to the Troubleshooting Guide.
To increase this time, turn off non-essential pieces of equipment (such as idle
computers and monitors) or add an optional external battery cabinets.
CAUTION:
Turning off the UPS while in battery mode will result in loss of
output power.
Once mains power is restored, the UPS resumes normal operation. At this time,
the Battery Charger begins recharging the battery.
Figure 4-1
Normal Mode Operation at
51-75% loading
Figure 4-2
Battery Mode Operation at
81-100% battery capacity
