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Battery Sizing Calculation As per IEEE Std 485-1997
Nominal Voltage 24 Volts
Minimum Voltage 21.6 Volts
Maximum Voltage 26.4 Volts
End cell Voltage 1.14 Volts
Voltage per cell 1.2 Volts
No of Cells 22 Nos
Minimum Cell Voltage 0.98181818182 Volts
Design Margin 1.1
Aging factor 1.25
Temprature correction factor 1
Overload Factor 1
Battery Type Ni-Cd
Back-Up time 8 hrs
MAIN HT PANEL
S.NO DESCRIPTION
Breakers Quantity 1
1 Relays
O\C & E\F Relay 0
Trip Circuit Supervision Relay 3 3
Sensitive E\F Relay 5 5
Master Tripping Relay 5 5
2 Indications
Annunciator 9 window 13.5 6.75
LED Indicating lamp(ON,OFF,TRIP,) 0.5 0.5
Trip Circuit Healthy 0.5 0.5
3 Energising Coils
VCB Tripping Coil 5 5
LOAD IN WATTS
INCOMER FEEDER QTY
VCB Closing Coil 5 5
DC operrated Motor
Total load in Watts
Load Current
LOAD NAME TIME IN MIN LOAD IN AMPS
A1 1 12.5416666667
A2 119 12.4166666667
A3 480 4.08333333333
1 2 3
Period Load in Amps
Section-1
1 12.5416666667 12.5416666667
Section-1 Sub total
Section-2
1 12.5416666667 12.5416666667
2 12.4166666667 -0.125
Section-2 Sub Total
Section-3
1 12.5416666667 12.5416666667
2 12.4166666667 -0.125
3 4.08333333333 -8.3333333333
Section-3 Sub Total
Uncorrected cell size
Corrected cell size
Charger rating
Change in Load (Amps)
Ah rating for the battery selected asper catolouge
Battery Sizing Calculation As per IEEE Std 485-1997
EDITABLE DATA
NON EDITABLE DATA
MAIN HT PANEL
0 6
0 0 0
0 18 21
0 30 35
0 30 35
27 3
0 3 3.5
3 3.5
0 30 180
BUS COUPLER
QTY
OUTGOING FEEDER
QTY
CONTINUOUS LOAD
MOMENTARY LOAD
EMERGENCY LOAD
0 30
200
98 200 3
4.083333333 8.333333333 0.125
4 5 6 7
Section-1
1 1.00 0.79
Section-1 Sub total 9.907916667
Section-2
1 120.00 2.8 35.116666667
119 119.00 2.8 -0.35
Section-2 Sub Total 34.76666667
Section-3
1 600.00 10.20 127.925
119 599.00 10.20 -1.275
480 480.00 8.300 -69.166666667
Section-3 Sub Total 57.48333333
57.48333333
79.03958333
120
8.854166667
Duration of period(mins)
Time to end of section (min)
Capacity at T minute rate K
factor
Reqd sec size =3*6 AH
Battery Sizing Calculation As per IEEE Std 485-1997
Nominal Voltage 24 Volts
Minimum Voltage 21.6 Volts
Maximum Voltage 26.4 Volts
End cell Voltage 1.14 Volts
Voltage per cell 1.2 Volts
No of Cells 22 Nos
Minimum Cell Voltage 0.98181818182 Volts
Design Margin 1.1
Aging factor 1.25
Temprature correction factor 1
Overload Factor 1
Battery Type Ni-Cd
Back-Up time 8 hrs
MAIN HT PANEL
S.NO DESCRIPTION
Breakers Quantity 0
1 Relays
O\C & E\F Relay 0 0
Trip Circuit Supervision Relay 3 0
Sensitive E\F Relay 5 0
Master Tripping Relay 5 0
2 Indications
Annunciator 9 window 13.5 0
LED Indicating lamp(ON,OFF,TRIP,) 0.5 0
Trip Circuit Healthy 0.5 0
3 Energising Coils
VCB Tripping Coil 5 0
LOAD IN WATTS
INCOMER FEEDER QTY
VCB Closing Coil 5 0
DC operrated Motor
Total load in Watts
Load Current
LOAD NAME TIME IN MIN LOAD IN AMPS
A1 1 9.625
A2 119 9.5
A3 480 1.16666666667
1 2 3
Period Load in Amps
Section-1
1 9.625 9.625
Section-1 Sub total
Section-2
1 9.625 9.625
2 9.5 -0.125
Section-2 Sub Total
Section-3
1 9.625 9.625
2 9.5 -0.125
3 1.16666666667 -8.3333333333
Section-3 Sub Total
Uncorrected cell size
Corrected cell size
Charger rating
Change in Load (Amps)
Ah rating for the battery selected asper catolouge
Battery Sizing Calculation As per IEEE Std 485-1997
EDITABLE DATA
NON EDITABLE DATA
MAIN HT PANEL
0 2
0 0 0
0 6 6
0 10 10
0 10 10
9 3
0 1 1
1 1
0 10 180
BUS COUPLER
QTY
OUTGOING FEEDER
QTY
CONTINUOUS LOAD
MOMENTARY LOAD
EMERGENCY LOAD
0 10
200
28 200 3
1.166666667 8.333333333 0.125
4 5 6 7
Section-1
1 1.00 0.79
Section-1 Sub total 7.60375
Section-2
1 120.00 2.65 25.50625
119 119.00 2.63 -0.32875
Section-2 Sub Total 25.1775
Section-3
1 600.00 10.20 98.175
119 599.00 10.20 -1.275
480 480.00 8.300 -69.166666667
Section-3 Sub Total 27.73333333
27.73333333
38.13333333
120
4.458333333
Duration of period(mins)
Time to end of section (min)
Capacity at T minute rate K
factor
Reqd sec size =3*6 AH
CABLE USED 2Cx35SQMM COPPER XLPE ARMOURED POWER CABLE
From To load current Distance(kM) Resistane/kM Drop %drop
HT ROOM SDB-1 9.17 0.18 0.524 1.7298 7.20762
HT ROOM SDB-2 9.17 0.26 0.524 2.4986 0.1041101
Voltage at terminal
22.2701712
21.5013584 2.5
Battery Sizing Calculation As per IEEE Std 485-1997
Nominal Voltage 24 Volts
Minimum Voltage 21.6 Volts
Maximum Voltage 26.4 Volts
End cell Voltage 1.14 Volts
Voltage per cell 1.2 Volts
No of Cells 22 Nos
Minimum Cell Voltage 0.98181818182 Volts
Design Margin 1.1
Aging factor 1.25
Temprature correction factor 1
Overload Factor 1
Battery Type Ni-Cd
Back-Up time 8 hrs
MAIN HT PANEL
S.NO DESCRIPTION
Breakers Quantity 0
1 Relays
O\C & E\F Relay 0 0
Trip Circuit Supervision Relay 3 0
Sensitive E\F Relay 5 0
Master Tripping Relay 9 0
2 Indications
Annunciator 9 window 13.5 0
LED Indicating lamp(ON,OFF,TRIP,) 0.5 0
Trip Circuit Healthy 0.5 0
3 Energising Coils
VCB Tripping Coil 5 0
LOAD IN WATTS
INCOMER FEEDER QTY
VCB Closing Coil 5 0
DC operrated Motor
Total load in Watts
Load Current
LOAD NAME TIME IN MIN LOAD IN AMPS
A1 1 9.17708333333
A2 119 9.08333333333
A3 480 0.75
Battery Sizing Calculation As per IEEE Std 485-1997
EDITABLE DATA
NON EDITABLE DATA
MAIN HT PANEL
0 1
0 0 0
0 3 3
0 5 5
0 9 9
4.5 2.25
0 0.5 0.5
0.5 0.5
0 5
BUS COUPLER
QTY
OUTGOING FEEDER
QTY
CONTINUOUS LOAD
MOMENTARY LOAD
EMERGENCY LOAD
0 5
200
18 200 2.25
0.75 8.333333333 0.09375
