IEEE Std 1115  IEEE RECOMMENDED PRACTICE FOR SIZING 
Project: Abacus IEEE
4.12.5.45 Valid 20140106  20141231  
Date: 20140213  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: LeadX 
(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
 
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 
 
Sec  Sub Total 
 
1  Total 
 
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 
 
2  A2 = 50  A2  1 =  50  M2 = 45  t = 45  1.16  1.04 
 
Sec  Sub Total 
 
2  Total 
 
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 
 
2  A2 = 50  A2  1 =  50  M2 = 45  t = 49  1.23  1.04 
 
3  A3 = 70  A3  2 = 20  M3 = 4  t = 4  0.21  1.08 
 
Sec  Sub Total 
 
3  Total 
 
Random Equipment Load Only (if needed)  
R  AR = 0  AR  0 = 0  MR = 0  t = 0  1  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

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