Emerson Liebert GXT4-5000RT230 - Page 47

Chapter 11 Specifications 39
Number of batteries Load
230VAC RT Models
5000VA
6000VA
10000VA
Internal battery + 5
external battery cabinets
10%
1427
1340
905
20%
772
649
452
30%
605
497
275
40%
454
326
207
50%
336
278
140
60%
290
228
113
70%
239
178
89
80%
208
142
75
90%
179
127
61
100%
142
111
57
Internal battery + 6
external battery cabinets
10%
1574
1500
1091
20%
1021
722
535
30%
685
593
305
40%
556
414
247
50%
443
317
188
60%
327
274
137
70%
283
232
113
80%
257
189
88
90%
233
158
77
100%
189
140
69
Using the configuration program, the user may specify the number of external battery cabinets attached to the UPS.
The factory default is programmed for internal batteries only.
Table 11-5 shows the estimated run times at different loads.
Auto-Learning Battery Run Times
As batteries age, the estimated runtimes may become less accurate. The Liebert® GXT4 is programmed to “learn”
from a full battery discharge and modify the estimated run time for the measured battery capacity. This can improve
accuracy and compensate for aging batteries or batteries that operate at different ambient temperatures.
The UPS will update the anticipated run time calculation only under certain conditions.
 The UPS must have a steady load that is greater than 20%.
 The UPS must be at 100% charge at the start of a battery discharge.
 The battery discharge must continue uninterrupted until the batteries reach their end-of-discharge voltage.
If all conditions are not met, the run time calculation will not be modified.
If the configuration program is used to change the number of battery cabinets, then the values in Table 11-5 will be
restored. This will override any value that is Auto-Learned.
Liebert GXT4 UPS 5000VA ~ 10000VA (230V) User Manual