IEEE Std 1115 IEEE RECOMMENDED PRACTICE FOR SIZING

Project: Abacus IEEE

4.12.5.45
Valid 2014-01-06 - 2014-12-31
Date: 2014-02-13 Sized By: PiSoftware (DemoUser)

Nominal Temperature: 20 °C
(Lowest 20 °C, Highest 20 °C)
Minimum Cell Voltage: 1.76 V Max. Volt. Drop: 0 V
No. of Cells: 102
Cell Mfr.: HBL Cell Type: Lead-X
(1) (2) (3) (4) (5) (6) (7) (8)
Period Load
(Amperes)
Change in Load
(Amperes)
Duration of Period
(Minutes)
Time to End of Section
(Minutes)
Capacity Rating Factor
at t Min Rate (Kt)
Temperature Derating Factor
for t Min (Tt)
Required Section Size
(3) X (6) X (7)
= Rated Amp Hrs
Pos. values Neg. values
Section 1 - First 1 Period(s) Only - if A 2 is greater than A 1, go to Section 2
1 A1 = 100 A1 - 0 = 100 M1 = 5 t = 5 0.24 1.08
25.98 0
Sec Sub Total
25.98 0
1 Total
25.98 0
Section 2 - First 2 Period(s) Only - if A 3 is greater than A 2, go to Section 3
1 A1 = 100 A1 - 0 = 100 M1 = 5 t = 50 1.25 1.04
130.22 0
2 A2 = 50 A2 - 1 = - 50 M2 = 45 t = 45 1.16 1.04
0 - 60.19
Sec Sub Total
130.22 - 60.19
2 Total
70.03 0
Section 3 - First 3 Period(s) Only - if A 4 is greater than A 3, go to Section 4
1 A1 = 100 A1 - 0 = 100 M1 = 5 t = 54 1.33 1.04
138.08 0
2 A2 = 50 A2 - 1 = - 50 M2 = 45 t = 49 1.23 1.04
0 - 64.13
3 A3 = 70 A3 - 2 = 20 M3 = 4 t = 4 0.21 1.08
4.62 0
Sec Sub Total
142.7 - 64.13
3 Total
78.57 0
Random Equipment Load Only (if needed)
R AR = 0 AR - 0 = 0 MR = 0 t = 0 1 0
0 0

Maximum Section Size (9) 78.57 Ah + Random Section Size (10) 0 Ah = Uncorrected Size (US) (11) 78.57 Ah
US (12) 78.57 Ah X Design Margin (13) 1 X Aging Factor (14) 1 / SOC factor 1 X Requirements margin 1 = (15) 78.57 Ah
When the cell size (15) is greater than a standard cell size, the next larger cell is required

Calculated Capacity: 78.57 Ah
Recommended Battery: 1 X
17 X LX-12 100 FT
Nominal Capacity: 100 Ah

This sizing is for information only. Please request manufacturers confirmation.