IBM 7029 6C3 - Page 199

Capacity will gradually decay from fresh battery value to the aged battery value, with the amount of decay
shown being worst case. The system will diagnose a ″failed battery″ if the capacity falls below the aged
battery level.
Typical Machine Holdup Time vs. Load in Minutes (Fresh Battery)
Machine
Load
3 kW 6 kW 9 kW 12 kW 15 kW 18 kW 19.5 kW
IBF
Configuration
N R N R N R N R N R N R N R
1 BPR 7.0 21 2.1 7.0
2 BPR 21 50 7.0 21 4.0 11 2.1 7.0
3 BPR 32 68 12 32 7.0 21 4.9 12 3.2 9.5 2.1 7.0 1.7 6.5
N = non-redundant, R = redundant
Typical Machine Holdup Time vs. Load in Minutes (Aged Battery)
Machine
Load
3 kW 6 kW 9 kW 12 kW 15 kW 18 kW 19.5 kW
IBF
Configuration
N R N R N R N R N R N R N R
1 BPR 4.2 12.6 1.3 4.2
2 BPR 12.6 30 4.2 12.6 2.4 6.6 1.3 4.2
3 BPR 19.2 41 7.2 19.2 4.2 12.6 2.9 7.2 1.9 5.7 1.3 4.2 1.0 3.9
N = non-redundant, R = redundant
Chapter 2. Physical Characteristics of Systems 181