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HZL-BTN-ELE-DS-SY-037
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop %
Current derating factor
Calculation
Full load cur rent rating o f the Feeder
Size of 300 Sq.mm 3.5 core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving at the capacity =
current carrying capacity of 300sq.mm,3Run cable =
= A
Check for voltage drop
Voltage drop
Where,
(Assumed)
With in the permissible limits of 5% voltage drop hence ok
Short Time rating of the Cable
1.94x
PMCC TO MCC INCOMER
1.00
1.01 P = 460
1.02 VT
%
= 0.415
1.03 L = 50
1.04 R = 0.129
1.05 X = 0.0705
1.06 = 5
1.07 = 0.65
= =
2.00
2.01
P= 800 A
3 x V 3 x 0.415
460 / 0.8IFL
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
300 1.0 455 A
Factor for grouping of cables 0.86
Reduction Factor 0.9
Factor for Non leaner loads 0.8
0.65
2.03 455x3x0.65
887
3.00
3.01
IFLVdrop = x (R cos+ X sin) x L
n
cos = 0.8sin = 0.6
50800
Vdrop =3
x ((0.000129 x 0.8) + (0.0000705 x 0.6))
V
x
Vdrop
%Vdrop =
=
300=
1.94
100 = 0.81
22.7=
240
3.02Iw =
s
LT CABLE SIZING CALCULATION
KA/0.2Sec13.2xt 13.2*1
3.03
(ACB Operated)
3 runs of 1.1kV grade, 3.5C x300 sq.mm, Al conduc tor, Armoured, XLPE cable is selected
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INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / kmReactance of the cable at 50Hz / km
Allowable Voltage Drop at Normal Running Cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 95 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving at the capacity =
Current carrying capacity of 95 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
0.98240
2.335x 100 =
Factor for grouping of cables 0.86
=
144
76.5
0.0724
0.65
45
= 2.5
221 A
=
0.9
Factor for Non linear loads
= 2.335
(R cos+ X sin)
0.8
0.6
x
V
%
2.00
2.01
76.5 / 0.8
IFL =
PMCC TO Crusher Building EOT Crane
1.00
=1.01 P
0.409
VT = 0.415
=1.03 L
1.02
1.06
1.05 X1.04 R
2.02Cable size
Rating factor for Ambient
Temperature 35C
3 x V x 0.95x3 x 0.415=
P
A
Current Rating at 35C
0.8
n
x
95 1.0
= 140
Reduction Factor
IFL
Vdrop =
2.03 221x1x0.65
x
3.00
3.01
L
sin =
cos =
140
Vdrop =
1
%Vdrop =
Vdrop
x 45
Check for Starting Current3.02
1.07 = 15
840 ( 6 Times the full load current)
1.08 = 0.65
((0.000409 x 0.8) + (0.0000724 x 0.6))
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Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at Normal running Cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 300 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 300 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
14.01
x 100
= x
= 5.84
840
1
((0.000409 x 0.8) + (0.0000724 x 0.6))Vdrop
=
=
It is to be noted that motor has been selected to start up to 80% of rated voltage
%240
13.2xt
= 0.65
0.0705
242
= 15
VT
L = 165
= 0.415
x
A
x
296
Factor for Non linear loads
0.65
(R cos+ X sin)
1.01 P
1.06
2.00
2.01
1.02
3.03
1.03
1.05
1.08
X
1.07
1.04 R
16.1
1.00
Iw =s
3.04 1 run o f 1.1kV grade, 3.5C x95sq.mm, Al conductor, Armoured, XLPE cable is selected
=95
13.2*.2
132 / 0.8
IFL =
0.95x3 x 0.415=
3 x V x
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
2.03 455x1x0.65
300 1.0
0.8
455 A
Factor for grouping of cables 0.86
Reduction Factor 0.9
3.00
3.01
IFL
Vdrop =
n
KA/0.2Sec
L
= 2.5
= 0.129
=
P
PMCC TO Conveyor 01
x
%Vdrop =
= 14.01Vdrop V
132=
(Fuse Operated)
45
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HZL-BTN-ELE-DS-SY-037
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at Normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 150 Sq.mm 3.5core Aluminium cable is selected for checking.
5.81
= 14.53 %240
240x 100 =
=
90
((0.000129 x 0.8) + (0.0000705 x 0.6))
0.264
13.2*1
VT = 0.415
2.43 %
R =
1.02
1.04
1.05
2.01
2.00
0.8
x
3.02
=
cos =
242
Vdrop =
1
Vdrop
%Vdrop
3.04 1 run of 1.1kV grade, 3.5C x300sq.mm, Al conductor, Armoured, XLPE cable is selected
KA/SecIw =s
=13.2xt
30022.7
1.00
1.01 P =
1.03 L = 270
0.0716X =
= 0.65
15
1.06 = 2.5
1.08
1.07 =
IFL = A0.95x3 x 0.415
P
=3 x V x
165=
90 / 0.8
sin
= x
Vdrop = 34.859 V
Check for Starting Current
1452 ( 6 Times the full load current)
1452
Vdrop
165((0.000129 x 0.8) + (0.0000705 x 0.6)) x
5.81
=
0.6
V=
PMCC TO Conveyor 02
%Vdrop =
x
1
34.859x 100
It is to be noted that motor has been selected to start up to 80% of rated voltage
3.03
(Fuse Operated)
165
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HZL-BTN-ELE-DS-SY-037
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 150 sq.mm2 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
Rating factor for Ambient
Temperature 35C
%100 = 14.16
3.01
2.02Current Rating at 35CCable size
2.03 292x2x0.65
292 A
Factor for grouping of cables 0.86
Reduction Factor 0.9
Factor for Non linear loads 0.8
0.65
L(R cos+ X sin)
380
3.00
IFL
Vdrop =
cos
n
sin =
165
Vdrop =
2
150
%Vdrop =
3.02
3.04
Vdrop = 5.661
Iw =
2 run of 1.1kV grade, 3.5C x150sq.mm, Al conductor, Armoured, XLPE cable is selected
25.4s KA/0.2Sec13.2xt
=13.2*.2
=
x
%
((0.000264 x 0.8) + (0.0000716 x 0.6))
150
x
V
= 0.8
240
5.661
x ((0.000264 x 0.8) + (0.0000716 x 0.6))
x 100 =
It is to be noted that motor has been selected to start up to 80% of rated voltage
270
2402.36
x
0.6
= 33.968 V
1.0
3.03
=33.968
2
Vdrop =
990
Check for Starting Current
990 ( 6 Times the full load current)
x x
Vdrop
%Vdrop
(Fuse Operated)
x 270
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HZL-BTN-ELE-DS-SY-037
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at Normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 150 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 150 sq.mm2 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence okShort Time rating of the Cable
DOL or Squirrel Cage = A
= 2.22 %240
100
2
%Vdrop =
137
Vdrop 5.31
5.31
Reduction Factor
0.0716
150
0.8
=
x
0.86
x
0.9
((0.000264 x 0.8) + (0.0000716 x 0.6))
3.02
1.00
1.01
1.02
75P
=
= 2.5
1.0 292 A
0.65
(R cos+ X sin)
0.264
1.03 L = 305
1.05 X =
1.04 R =
2.00
2.01
1.06
1.07
75 / 0.8
IFL =
0.95x3 x 0.4153 x V x
2.02Cable size
=
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
137 A
P
=
3.01
Factor for Non linear loads 0.8
0.65
2.03
380
3.00
292x2x0.65
3 x IFLVdrop =
n
cos =
VT = 0.415
=
x 305
Check for Starting Current
822 ( 6 Times the full load current)
V
Vdrop
=
x
= 0.6sin
L
15=
1.08
x
Factor for grouping of cables
PMCC TO Conveyor 12 - Stream 2 Feed conveyor
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HZL-BTN-ELE-DS-SY-037
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop %
Current derating factors
Calculation
Full load cur rent rating o f the Feeder
Size of 185 Sq.mm 4 core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
current carrying capacity of 185sq.mm,2Run cable =
= A
Check for voltage drop
Voltage drop
=
2 run of 1.1kV grade, 3.5C x150sq.mm, Al conductor, Armoured, XLPE cable is selected
Iw =
13.28 %
= 25.4 KA/0.2Sec (Fuse Operated)
25
PMCC TO AUX. SWITCH BOARD
1.00
230
= 0.0718
5
= 0.415
1.01
1.04
1.06
VT
3.04
P =
1.02
x 305((0.000264 x 0.8) + (0.0000716 x 0.6))
240
x
31.86
100
It is to be noted that motor has been selected to start up to 80% of rated voltage
V
13.2*.2=
13.2xt
s 150
x
1.03
0.21
2.02Cable size
L
1.05 X
P=
=
3 x 0.415
230 / 0.8IFL
R
=
=
1.07 = 0.65
=
2.00
2.01
185
= A
0.86
1.0 337 A
400
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
3 x V
Reduction Factor 0.9
Factor for grouping of cables
Factor for Non leaner loads 0.8
0.65
2.03 337x2x0.65
438
3.00
3.01
IFLVdrop =
nLx (R cos+ X sin) x
822
Vdrop =
2
Vdrop = 31.86
%Vdrop =
3.03
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HZL-BTN-ELE-DS-SY-037
Where,
(Assumed)
With in the Permissible limit of 2.5% voltage drop hence ok
Short Time rating of the Cable
INPUT DATAFeeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop %
Calculation
Full load current rating of the Feeder
Size of 35 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
==
Total factor to be applied for arriving the capacity =
Current carrying capacity of 35 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
0.44
Current Rating at 35C
= 1.11
L =
R
Reduction Factor 0.9Factor for Non linear loads 0.8
x (R cos+ X sin) x L
MCC TO PRIMARY GYRATORY CRUSHER LOCAL PANEL
2.00
1.01
1.06
1.02
1.00
1.04
1.05
40.2
VT = 0.415
P =
=
351.03
0.0783X
= 5
40.2 / 0.8
= 74 A
0.95x3 x 0.415
2.01
2.02Cable size
P
3 x V x
Rating factor for Ambient
Temperature 35C
IFL = =
117 A
Factor for grouping of cables 0.86
0.65
35 1.0
2.03 117x1x0.65
76
3.00
3.01
IFL
Vdrop =
n
cos = 0.8sin = 0.6
cos = 0.8
sin = 0.6
x 25400
Vdrop =2
Vdrop
((0.00021 x 0.8) + (0.0000718 x 0.6))
V
%240
1.055x =
1.055
x
100=
=
KA/0.2Sec13.2xt 13.2*.2
3.02
Iw =s
%Vdrop
=185
= 31.3
3.03 2 runs of 1.1kV grade, 3.5C x185 sq.mm, Al conduc tor, Armoured, XLPE cable is selected
(Fuse Operated)
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With in the Permissible limit of 2.5% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at Normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 16 Sq.mm 4 core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 16 sq.mm,1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
%
240
1 run o f 1.1kV grade, 3.5C x35sq.mm, Al conductor, Armoured, XLPE cable is selected
x 100 = 1.01
35
74
Vdrop =
1
x ((0.00111 x 0.8) + (0.0000783 x 0.6))
V
x
%Vdrop
2.422
=
=Vdrop
2.422
3.02
Iw =s
13.2xtKA/0.2Sec
3.03 CABLE SIZE :
=35
= 5.9313.2*.2
PRIMZRY GYRATOR CRUSHER SPIDER LUBRICATION SYSTEM
1.00
1.01 P = 1.5
0.415
1.03 L = 15
1.02 VT =
1.04 R = 2.44
1.05 X = 0.0808
1.06 = 2.5
1.08 = 0.65
= =
2.00
2.01P
= 3 A
3 x V x 0.95x3 x 0.415
1.5 / 0.8
IFL
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
16 1.0 70 A
Factor for grouping of cables 0.86
Reduction Factor 0.9
Factor for Non linear loads 0.8
0.65
2.03 70x1x0.65
46
3.00
3.01
IFL
Vdrop =
n
x (R cos+ X sin) x L
1.07 = 15
(Fuse Operated)
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HZL-BTN-ELE-DS-SY-037
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at Normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 16 Sq.mm 4 core Aluminium cable is selected for checking.
%240
KA/0.2Sec13.2xt 13.2*.2
PRIMARY GYRATOR CRUSHER OVER PRESSURE DUST SYSTEM AIR BLOWER
1.00
1.01
0.09x 100 = 0.04 %
240
cos = 0.8
sin = 0.6
3
Vdrop =
1
((0.00244 x 0.8) + (0.0000808 x 0.6))
V
x 15
=
= 0.09
x
Vdrop
%Vdrop
1
Vdrop
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
=16
= 2.71Iw =s
P = 1.1
1.02 VT = 0.415
= 2.44
1.03 L = 15
1.04 R
2.5
1.05 X = 0.0808
1.08 = 0.65
= =
2.00
2.01
P
= 2 A3 x V x 0.95x3 x 0.415
1.1 / 0.8
IFL
1.07 = 15
18
Vdrop
1.06 =
x ((0.00244 x 0.8) + (0.0000808 x 0.6))
Check for Starting Current
18 ( 6 Times the full load current)
3.02
15
= 0.54 V
=
3.03
%Vdrop =
(Fuse Operated)
It is to be noted that motor has been selected to start up to 80% of rated voltage
0.54x 100 = 0.23
x
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(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 16 sq.mm,1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
0.03x 100 =0.06
=
Vdrop
%240
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
16 1.0 70 A
Factor for grouping of cables 0.86
Reduction Factor 0.9
Factor for Non linear loads 0.8
0.65
2.03 70x1x0.65
46
3.00
3.01
IFL
Vdrop =
n
x (R cos+ X sin) x L
cos = 0.8
sin = 0.6
x 15
2
Vdrop =
1
0.06
x ((0.00244 x 0.8) + (0.0000808 x 0.6))
VVdrop
%Vdrop
=
3.02
Iw =s
Check for Starting Current
12 ( 6 Times the full load current)
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
=16
= 2.71
=
0.36
12
1
V
x 15x ((0.00244 x 0.8) + (0.0000808 x 0.6))
Vdrop
%Vdrop =
=
0.36
It is to be noted that motor has been selected to start up to 80% of rated voltage
x 100 = 0.15 %240
3.03
KA/0.2Sec13.2xt 13.2*.2
(Fuse Operated)
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INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / kmReactance of the cable at 50Hz / km
Allowable Voltage Drop at Normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =Current carrying capacity of 16 sq.mm,1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
0.30.13
P
VT
5.6 / 0.8
%
=
Reduction Factor 0.9
46
0.6570x1x0.65
x 100 =
=
16 1.0
x
2.02
3 x V x
Cable size
1.00
1.01
1.02
5.6=
Primary Gyratory Crusher lube pump
=
0.415
1.03 L = 15
= 2.440.08081.05 X =
1.04 R
2.5
2.00
2.01
1.08 =
1.06
0.65
1.07
IFL =
P
70 A
Rating factor for Ambient
Temperature 35C
=
Current Rating at 35C
10 A
0.95x3 x 0.415
Factor for grouping of cables 0.86
3.00
3.01
Factor for Non linear loads 0.8
2.03
x L
IFL
Vdrop =
n
cos
x
= 0.8
(R cos+ X sin)
sin = 0.6
10Vdrop =
1
x 15((0.00244 x 0.8) + (0.0000808 x 0.6))
3.02
0.3 VVdrop =
240%Vdrop =
Check for Starting Current
60 ( 6 Times the full load current)
= 15
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Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at Normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 16 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 16 sq.mm,1 Run Cable =
= A
P
R
Reduction Factor 0.9
Cable sizeRating factor for Ambient
Temperature 35C
=
Current Rating at 35C
4 A
0.75 %240
1.8x 100 =
V
16
=
1.00
1.01
1.04
1.02 VT
= 15
2.71
1.03 L
2
0.415=
=
Primary Gyratory Crusher lube oil heater
2.44
0.08081.05 X =
=
= 0.65
1.06 = 2.5
2.00
2.01
1.08
0.95x3 x 0.415
2 / 0.8
IFL =
P
3 x V x
16 1.0 70 A
Factor for grouping of cables 0.86
46
Factor for Non linear loads 0.8
0.65
2.03 70x1x0.65
KA/0.2SecIw =s
=
13.2xt=
13.2*.2
x
2.02
60
Vdrop =
1.8
15
1
((0.00244 x 0.8) + (0.0000808 x 0.6)) x
=
=
It is to be noted that motor has been selected to start up to 80% of rated voltage
3.03
Vdrop
%Vdrop
1.07 = 15
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
(Fuse Operated)
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Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 15% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at Normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
0.3 %240
x
0.72x 100 =
0.12
Check for Starting Current
x L
%240
100 = 0.05
x
n
sin
1.00
1.01
KA/0.2Sec
primary gyratory crusher air/oil coolers
=P
= 15
11
= 0.415
0.0808
0.65
2.5
15
1.02 VT
1.03 L
1.04 R = 2.44
1.05 X =
=
1.06 =
1.07 =
1.08
3.00
= 0.8
(R cos+ X sin)
IFL
Vdrop =
= 0.6
cos
15((0.00244 x 0.8) + (0.0000808 x 0.6))
4Vdrop =
1
2.71
0.12 VVdrop =
x
==s
=13.2xt 13.2*.2
16
3.02
3.01
24 ( 6 Times the full load current)
%Vdrop =
x
x x 15
24
Vdrop =
1
0.72
((0.00244 x 0.8) + (0.0000808 x 0.6))
VVdrop
%Vdrop =
=
It is to be noted that motor has been selected to start up to 80% of rated voltage
3.03
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
Iw (Fuse Operated)
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Calculation
Full load current rating of the Feeder
Size of 16 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 16 sq.mm,1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
1.51 %240
100 =
16 1.0 70 A
100 = 0.25 %0.6
x240
3.601x
3.601
2.00
2.01
11 / 0.8
IFL =
P
=
3 x V x
2.02 Cable sizeRating factor for Ambient
Temperature 35C
=
Current Rating at 35C
20 A
0.95x3 x 0.415
Factor for grouping of cables 0.86
Reduction Factor 0.9
46
3.00
Factor for Non linear loads 0.8
0.65
2.03 70x1x0.65
x L
3.01
IFL
Vdrop =
cos
x
n
= 0.8
(R cos+ X sin)
sin = 0.6
20
Vdrop =
1
x 15((0.00244 x 0.8) + (0.0000808 x 0.6))
0.6 V
x
Vdrop =
%Vdrop =
3.02
xx
Check for Starting Current
120 ( 6 Times the full load current)
=
15
120
Vdrop =
1
Vdrop
%Vdrop
It is to be noted that motor has been selected to start up to 80% of rated voltage
((0.00244 x 0.8) + (0.0000808 x 0.6))
V
=
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Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at Normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 16 Sq.mm 4 core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 16 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
Factor for Non linear loads
0.86
= 7
Reduction Factor
P
0.95x3 x 0.415
4 / 0.8
16 1.0 179 A
13.2*.22.71
16=
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
KA/0.2SecIw =s
=13.2xt
x 15
3.00
2.03 179x1x0.65
116
2.00
2.01
Factor for grouping of cables
2.02Cable size
Rating factor for Ambient
Temperature 35C
2.44
X
AIFL = =
3 x V x
3.01
15
0.0808
= 2.5
Current Rating at 35C
=
MPS PUMP FOR MPS SYSTEM
1.00
1.01 P = 4
1.02 VT = 0.415
1.03
1.04
1.05
L
1.06
R =
=
x L
=
0.65
0.9
0.8
0.6
IFL
x
n
(R cos+ X sin)
= 0.8cos
Vdrop =
Vdrop ((0.00244 x 0.8) + (0.0000808 x 0.6))
sin =
7
x=
1
15
1.08 = 0.65
1.07
3.03
(Fuse Operated)
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With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at Normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 70 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
0.53100 =
=
=
%240
1.26x
P
=
Primary Crusher Product Apron Feeder (VFD)
A
55
55 / 0.8
= 101
0.95x3 x 0.415
Check for Starting Current
42
70 1.0 179 A
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
IFL
1.06
2.00
2.01
1.07
3 x V x
= 5
1.05 X = 0.074
= 15
1.08
1.04 R = 0.565
1.03 L = 50
1.02 VT = 0.415
1.00
1.01 P =
Vdrop
3.02
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
s 16Iw = = = 2.71 KA/0.2Sec
13.2xt 13.2*.2
= 0.21
( 6 Times the full load current)
V
%Vdrop = 0.09 %240
0.21x 100
42
Vdrop =
1
1.26
x ((0.00244 x 0.8) + (0.0000808 x 0.6))
V
=
=
It is to be noted that motor has been selected to start up to 80% of rated voltage
3.03
Vdrop
%Vdrop
= 0.65
(Fuse Operated)
x 15
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=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 70 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
For VFD = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kVLength of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
%= 1.573.76
x 100240
x (R cos+ X sin) x
100 %= 1.05
0.8
1.02 VT = 0.4151.03 L = 165
1.04 R = 2.44
1.05 X = 0.0808
Metal Detector conveyor 1
1.00
1.01 P = 0.04
KA/0.2Sec
0.65
L
Vdrop =
13.2*.2
3.02
Iw =s
13.2xt
3.04 1 run o f 1.1kV grade, 3.5C x70sq.mm, Al conductor, Armoured, XLPE cable is selected
=70
= 11.9 (Fuse Operated)
%Vdrop =
((0.000565 x 0.8) + (0.000074 x 0.6))
V2.507
x
2.507
240x
101
Vdrop =
1
sin = 0.6
cos =
3.00
3.01
IFL
Vdrop =
n
2.03 179x1x0.65
116
Reduction Factor 0.9
Factor for Non linear loads 0.8
Factor for grouping of cables 0.86
x
x 50
Check for Starting Current
152 ( 1.5 Times the full load current)
50151.5
Vdrop =1
3.76
x ((0.000565 x 0.8) + (0.000074 x 0.6))
V
=
=
It is to be noted that motor has been selected to start up to 80% of rated voltage3.03
Vdrop
%Vdrop
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Allowable Voltage Drop at Normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 16 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
Check for Starting Current
0.39
0.129x 100 =
((0.00244 x 0.8) + (0.0000808 x 0.6))
%240
100 = 0.01
3.02
V
=
3 x V x
Current Rating at 35C
0.65
46
0.065
Factor for grouping of cables
0.021
0.021
V
0.06 %240
x
0.04 / 0.9
0.86
IFL
1.0
0.95x3 x 0.415
=
Rating factor for Ambient
Temperature 35C
16
3.00
Reduction Factor 0.9
Factor for Non linear loads 0.8
2.03
70 A
1.06 = 2.5
1.08 = 0.65
2.00
2.01
2.02Cable size
=
P
cos =
3.01
IFL
=
n
Vdrop
Vdrop =
Vdrop =
%Vdrop =
70x1x0.65
0.065
1
sin =
L
A
0.6
165
(R cos+ X sin)
0.39
Vdrop
( 6 Times the full load current)
1.07 = 15
0.8
x
x
x
x
165
1
= x ((0.00244 x 0.8) + (0.0000808 x 0.6)) x
%Vdrop =
Vdrop = 0.129
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With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at Normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 16 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 16 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
= 2.7113.2*.2
Reduction Factor
It is to be noted that motor has been selected to start up to 80% of rated voltage
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
Iw =s
=13.2xt
16(Fuse Operated)
x
((0.00244 x 0.8) + (0.0000808 x 0.6))
6 A
0.415
P =
VT =
70 A
0.9
1.02
1.03
1.05
2.00
KA/0.2Sec
1.00
1.01 3.7
= 165
= 0.0808
L
X
L
Factor for grouping of cables 0.86
16 1.0
Factor for Non linear loads 0.8
46
1.04 R = 2.44
1.06 = 2.5
2.01
=
3 x V x IFL =
2.02Cable size
Rating factor for Ambient
Temperature 35C
3.7 / 0.8
3 x 0.415
Current Rating at 35C
P
=
3.00
3.01
2.03
IFL
Vdrop =
n
0.8
x (R cos+ X sin)
cos =
sin = 0.6
165
6Vdrop =
1
x
MCC TO BELT MAGNET CONVEYOR 01 - BELT DRIVE
= 0.65
0.65
70x1x0.65
3.03
1.07 = 15
1.08
x
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With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = ADrop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at Normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 35 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
4.96 %240
11.883x 100 =
0.83 %240
= 0.415
L = 36
0.0783
=
=
VT
1.01
1.02
1.03
1.06
2.01
Primary Crusher area spillage pump
1.00
1.05 X =
1.04 R
1.07 = 15
=
2.00
1.08 0.65
30 / 0.8
IFL =
0.95x3 x 0.415
P
3 x V x =
0.86
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
35 1.0
Factor for grouping of cables
117 A
0.9Reduction Factor
0.8Factor for Non linear loads
P
= 55 A
=
Vdrop
%Vdrop =
= 1.98
KA/0.2Sec13.2xt 13.2*.2
1.11
= 30
2.5
Check for Starting Current
36 ( 6 Times the full load current)
3.02
36
Vdrop =
V
1.98x 100
165
1
x
11.883
((0.00244 x 0.8) + (0.0000808 x 0.6)) x
V
=
=
It is to be noted that motor has been selected to start up to 80% of rated voltage
3.03
Vdrop
%Vdrop
1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
2.71
3.04
=16
=Iw =s
(Fuse Operated)
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Total factor to be applied for arriving at the capacity =
Current carrying capacity of 35 sq.mm,1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at normal running cond. %
4.63 %240
11.108x 100 =
1.851x 100 = 0.78 %
240
1 run o f 1.1kV grade, 3.5C x35sq.mm, Al conductor, Armoured, XLPE cable is selected
5.93= KA/0.2Sec13.2xt
V1.851
x
Iw =
3.00
3.04
1.03
=
2.03
3.01
IFL
Vdrop =
cos
x
n
= 0.8
(R cos+ X sin)
sin = 0.6
55Vdrop =
1
Vdrop =
%Vdrop
3.02
13.2*.2
=
s 35
x ((0.00111 x 0.8) + (0.0000783 x 0.6))
V
Check for Starting Current
330 ( 6 Times the full load current)
76
1.02 VT
0.65
x 36
117x1x0.65
((0.00111 x 0.8) + (0.0000783 x 0.6))
x L
= 0.415
0.0808
1.04 R = 2.44
1.06
P = 5.5
L = 60
1.05 X =
Apron Feeder Venti lat ion System Exhaust Fan
1.00
1.01
= 2.5
330
Vdrop = x 361
Vdrop = 11.108
%Vdrop =
It is to be noted that motor has been selected to start up to 80% of rated voltage
3.03
(Fuse Operated)
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Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 16 Sq.mm 4 core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=Total factor to be applied for arriving the capacity =
Current carrying capacity of 16 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
x 100240
0.5 %
= 3.01 %
P
=
3 x V x
2.01
3.00
2.00
0.8
= 10
7.202
=
1.07
16 1.0 70 A
Factor for grouping of cables 0.86
A
0.95x3 x 0.415
5.5 / 0.8
IFL =
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
Reduction Factor 0.9
Factor for Non linear loads 0.80.65
2.03 70x1x0.65
46
L
3.01
IFL
Vdrop =
n
x (R cos+ X sin) x
cos =
sin =
60
0.6
10
Vdrop =
1
x ((0.00244 x 0.8) + (0.0000808 x 0.6)) x
Vdrop
=
= 1.2 V
1.2
x 100
((0.00244 x 0.8) + (0.0000808 x 0.6))
V
=
%Vdrop
3.02
Vdrop
%Vdrop
7.202
x
=Vdrop
240
60
Check for Starting Current
60 ( 6 Times the full load current)
= 15
1.08 =
=
1
x 60
0.65
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Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 16 Sq.mm 4 core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 16 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
2.71
2.02
It is to be noted that motor has been selected to start up to 80% of rated voltage
=
3 x V x
Cable size Rating factor for AmbientTemperature 35C
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
P
KA/0.2Sec13.2xt 13.2*.2
Apron Feeder Venti lat ion System Supp ly Fan
s=
16Iw = =
1.00
1.01 P = 11
1.02 VT = 0.415
1.03 L = 60
1.04 R = 2.44
= 2.5
1.05 X = 0.0808
2.00
2.01
1.06
1.07
0.95x3 x 0.415
11 / 0.8
IFL =
Factor for grouping of cables
Current Rating at 35C
16 1.0 70 A
Reduction Factor 0.9
Factor for Non linear loads 0.8
n
0.65
2.03 70x1x0.65
46
x
IFL
Vdrop =
3.00
3.01
cos =
sin =
20
Vdrop =
1
3.03
= 15
1.08 =
x ((0.00244 x 0.8) + (0.0000808 x 0.6))
0.8
0.6
x (R cos+ X sin)
0.65
x
L
0.86
= 20 A
(Fuse Operated)
60
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With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 16 Sq.mm 4core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
240100
CV - 01 Ventilation System Exhaust Fan
1.00
1.01
P
=
3 x V x
=
Vdrop
%Vdrop
3.02
Iw =s
120
Vdrop =
KA/0.2Sec13.2xt 13.2*.2
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
=16
= 2.71
2.2
1.02 VT = 0.415
=P
1.03 L = 165
1.04 R = 2.44
= 2.5
1.05 X = 0.0808
2.00
2.01
1.06
1.07
1.08
= 4 A
0.95x3 x 0.415
2.2 / 0.8
IFL =
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
16 1.0 70 A
Factor for grouping of cables 0.86
Reduction Factor 0.9
Factor for Non linear loads 0.8
0.65
= 0.65
Check for Starting Current
120 ( 6 Times the full load current)
=
= 2.401
2.401x 100
240
V
%= 1.01
14.403 V
x
Vdrop =
1
((0.00244 x 0.8) + (0.0000808 x 0.6))
It is to be noted that motor has been selected to start up to 80% of rated voltage
3.03
%Vdrop =14.403
x 6.01 %
= 15
(Fuse Operated)
x 60
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Current carrying capacity of 16 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / kmAllowable Voltage Drop at normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
240
= 0.55 %240
= 3.31 %
1.32x 100
CV - 01 Ventilation System Supply Fan
1.00
1.01 P = 2.2
2.03 70x1x0.65
46
3.00
3.01
IFL
Vdrop =n
x (R cos+ X sin) x L
cos = 0.8
sin = 0.6
x 165
4
Vdrop =
1
1.32
x ((0.00244 x 0.8) + (0.0000808 x 0.6))
VVdrop
%Vdrop =
=
3.02
Iw =s
Check for Starting Current
24 ( 6 Times the full load current)
KA/0.2Sec
13.2xt 13.2*.2
1
Vdrop =
7.922
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
=16
= 2.71
1.02 VT = 0.415
1.03 L = 165
1.04 R = 2.44
= 2.5
1.05 X = 0.0808
1.06
1.07 15
= 0.65
%Vdrop
7.922
x
x 100=
=
165x ((0.00244 x 0.8) + (0.0000808 x 0.6))
V
24
3.03
1.08
=
Vdrop
It is to be noted that motor has been selected to start up to 80% of rated voltage
(Fuse Operated)
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Calculation
Full load current rating of the Feeder
Size of 16 Sq.mm 4 core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 16 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
%240
1.32x 100
( 6 Times the full load current)
7.922
1.0
x (R cos+ X sin)
= 0.55
70 A
Factor for grouping of cables
%240
P
=
3 x V x
16
2.00
2.01
A
0.95x3 x 0.415
2.2 / 0.8
IFL =
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
0.86
2.03 70x1x0.65
46
Reduction Factor 0.9
Factor for Non linear loads 0.8
3.00
3.01
IFL
Vdrop =
n
x L
cos = 0.8
sin = 0.6
x 165
4
Vdrop =
1
Vdrop
%Vdrop
24
Vdrop =
7.922
((0.00244 x 0.8) + (0.0000808 x 0.6))
Check for Starting Current
((0.00244 x 0.8) + (0.0000808 x 0.6))
0.65
= 4
3.02
x 165
=
= 1.32
x
1
24
V
V
x
Vdrop =
It is to be noted that motor has been selected to start up to 80% of rated voltage
%Vdrop = x 100 = 3.31
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Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factorsCalculation
Full load current rating of the Feeder
Size of 25 Sq.mm 4core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 25 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
P
=
3 x V x
Iw =s
KA/0.2Sec13.2xt 13.2*.2
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
=16
= 2.71 (Fuse Operated)
COSP Ventilation Exhaust Fan
1.00
1.01 P = 7.5
1.02 VT = 0.415
1.03 L = 257
1.04 R = 1.53
= 2.5
1.05 X = 0.0805
2.00
2.01
1.06
1.07
1.08
= 14 A
0.95x3 x 0.415
7.5 / 0.8
IFL =
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
25 1.0 96 A
Factor for grouping of cables 0.86
Reduction Factor 0.9
Factor for Non linear loads 0.8
0.65
2.03 96x1x0.65
62
3.00
3.01
IFL
Vdrop =
n
x (R cos+ X sin) x L
cos = 0.8
sin = 0.6
x 25714Vdrop =
1
4.578
x ((0.00153 x 0.8) + (0.0000805 x 0.6))
VVdrop =
= 15
= 0.65
3.03
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With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 16 Sq.mm 4core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 16 sq.mm1 Run Cable =
= A
1.91 %240
27.466x 100 = 11.45 %
240
4.578x 100 =
16 1.0 70 A
3 x V x
= 7
%Vdrop =
3.02
Iw =s
Check for Starting Current
84 ( 6 Times the full load current)
KA/0.2Sec13.2xt 13.2*.2
1
Vdrop =
%Vdrop
3.04 1 run of 1.1kV grade, 4C x25sq.mm, Al conducto r, Armoured, XLPE cable is selected
=25
= 4.23 (Fuse Operated)
COSP Ventilation Supply Fan
1.00
1.01 P = 3.7
1.02 VT = 0.415
1.03 L = 257
1.04 R = 2.44
= 2.5
1.05 X = 0.0808
2.00
2.01
1.06
1.07
A
0.95x3 x 0.415
3.7 / 0.8
IFL =
P
=
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
Factor for grouping of cables 0.86
Reduction Factor 0.9
Factor for Non linear loads 0.8
0.65
2.03 70x1x0.65
27.466 V
84
=
x 257x ((0.00153 x 0.8) + (0.0000805 x 0.6))
=
3.03
1.08
Vdrop
= 15
= 0.65
46
It is to be noted that motor has been selected to start up to 80% of rated voltage
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Check for vo ltage drop
Voltage drop
Where,(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
1.5 %240
21.593x 100 = 9 %
240
3.599
x 100 =
1.03
1.04
1.05
1.06
1.07
2.44
2.5
48
=
0.0808
=
L =
=
X =
0.415
15
=
R
3.00
3.01
IFL
Vdrop =
n
0.8
x (R cos+ X sin)
cos =
sin = 0.6
257
7
Vdrop =
1
Vdrop
%Vdrop
1.02 VT
KA/0.2Sec13.2xt 13.2*.2
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
=s
P = 11
=
3.02
Iw =
1.01
Vdrop =
PCH AREA DSP PUMPS
1.00
16= 2.71
((0.00244 x 0.8) + (0.0000808 x 0.6))
Check for Starting Current
( 6 Times the full load current)
x
Lx
x 257
42
= 3.599
x ((0.00244 x 0.8) + (0.0000808 x 0.6))
V
42
1
Vdrop = 21.593 V
x
%Vdrop =
It is to be noted that motor has been selected to start up to 80% of rated voltage
3.03
1.08 = 0.65
(Fuse Operated)
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Calculation
Full load current rating of the Feeder
Size of 16 Sq.mm 4 core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 16 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
0.8 %240
11.523x 100 = 4.81 %
240
1.92
x 100 =
Cable sizeRating factor for Ambient
Temperature 35CCurrent Rating at 35C
16 1.0 70 A
0.9
2.02
2.00
0.86
Factor for Non linear loads
Factor for grouping of cables
IFL = 20 A
3 x V x
P 11 / 0.8
= =
2.01
0.95x3 x 0.415
0.8
0.65
Reduction Factor
2.03 70x1x0.65
46
3.00
3.01
IFL
Vdrop =
n
L
cos = 0.8
x (R cos+ X sin) x
sin = 0.6
x 48
20
Vdrop =
1
1.92
x ((0.00244 x 0.8) + (0.0000808 x 0.6))
VVdrop
%Vdrop
=
3.02 Check for Starting Current
120 ( 6 Times the full load current)
1
Vdrop =
11.523 V
120
x ((0.00244 x 0.8) + (0.0000808 x 0.6))
=
=
=Vdrop
%Vdrop
x 48
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Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at normal running cond. %
Allowable Voltage Drop at Starting Condition %Current derating factors
Calculation
Full load current rating of the Feeder
Size of 16 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 16 sq.mm,1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
=
MOTORISED FLOPPER GATE
Reduction Factor
x
0.9
x L
= 5.5P
= 0.415
R
2.01
2.00
VT
L = 50
2.441.04
1.00
1.01
1.02
1.03
= 2.5
0.0808X =
1.06
1.05
5.5 / 0.8
IFL = 10
1.07 =
A
0.95x3 x 0.415
P
=
3 x V x
1.08
2.02
Cable size
=
0.86
Rating factor for Ambient
Temperature 35C Current Rating at 35C
16 1.0 70 A
Factor for grouping of cables
3.00
3.01
Factor for Non linear loads 0.8
2.03
IFL
Vdrop =
n
cos
x
= 0.8
(R cos+ X sin)
sin = 0.6
10
Vdrop =
1
x((0.00244 x 0.8) + (0.0000808 x 0.6)) 50
Iw =s
KA/0.2Sec13.2xt 13.2*.2
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
=16
= 2.71
It is to be noted that motor has been selected to start up to 80% of rated voltage
3.03
= 0.65
46
0.65
70x1x0.65
(Fuse Operated)
15
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With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = ADrop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 185 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
0.42x 100 =
Current Rating at 35C
0.86
=
%240
6.001x 100 = 2.51 %
240
1
16
185
KA/0.2Sec=
0.415
=
337 A
82 A
1.0
=s
1 V
2.71
Factor for grouping of cables
Reduction Factor
= 45
VT
15
= 2.5
0.9
Vdrop =
%Vdrop
13.2*.2Iw =
13.2xt
= 6.001 V
1.00
0.0718
=
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
3.02
1.01 P
1.02
1.03 L = 334
1.04 R = 0.21
1.05 X =
=
1.07 =
1.08
1.06
2.00
2.01
45 / 0.8
IFL =
P
=
3 x V x 0.95x3 x 0.415
2.02Cable size
Rating factor for Ambient
Temperature 35C
Factor for Non linear loads 0.8
0.65
Conveyor 4 - Stokpile feed conveyor with t ripper car
60
x ((0.00244 x 0.8) + (0.0000808 x 0.6)) x
Check for Starting Current
60 ( 6 Times the full load current)
1
Vdrop =
Vdrop
%Vdrop =
It is to be noted that motor has been selected to start up to 80% of rated voltage
3.03
(Fuse Operated)
0.65
50
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Current carrying capacity of 185 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
2.41
13.2*.2
((0.00021 x 0.8) + (0.0000718 x 0.6))x
0.415
260
2.44
%240
34.686x 100 = 14.46 %
240
5.781x 100 =
x
5.781 V
82
1
V
13.2xt
It is to be noted that motor has been selected to start up to 80% of rated voltage
Tripper car
KA/0.2Sec
((0.00021 x 0.8) + (0.0000718 x 0.6))
219
3.00
2.03 337x1x0.65
x L
3.01
IFLVdrop =
cos
x
n
= 0.8
(R cos+ X sin)
sin = 0.6
=
=
Vdrop =
Vdrop =
34.686
%Vdrop =
Vdrop =
3.04 1 run of 1.1kV grade, 3.5C x185sq.mm, Al conductor, Armoured, XLPE cable is selected
Iw =s
=185
1.00
1.02 VT =
P1.01
1.05 X =
1.03 L =
1.06 = 2.5
1.08 =
1.07 =
= 31.3
Vdrop
0.0808
334
1.04 R =
%Vdrop
492
x 334
492
3.02
( 6 Times the full load current)
Check for Starting Current
1
3.03
= 3.7
15
0.65
(Fuse Operated)
x
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HZL-BTN-ELE-DS-SY-037
Calculation
Full load current rating of the Feeder
Size of 16 Sq.mm 4core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 16 sq.mm1 Run Cable == A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
%240
21.845x 100 = 9.11 %
240
x 100 = 1.52
3.641 V
x
2.00
2.01
IFL =
P
2.02Cable size
Rating factor for Ambient
Temperature 35C
0.8
70 A
Current Rating at 35C
Reduction Factor
2.03 70x1x0.65
3.00
3.01
46
Vdrop
sin
cos
=
n
IFL
=
7Vdrop =
1
Vdrop
0.86
Factor for Non linear loads
=
3 x V x
=
=
0.6
16 1.0
0.9
Factor for grouping of cables
x 260
x(R cos+ X sin)
3.7 / 0.8
=
0.8
x
3.02
%Vdrop
A
((0.00244 x 0.8) + (0.0000808 x 0.6))
=
7
L
0.65
0.95x3 x 0.415
260
1
x x
42
Vdrop =
V
Check for Starting Current
42 ( 6 Times the full load current)
3.641
%Vdrop
21.845
((0.00244 x 0.8) + (0.0000808 x 0.6))
=
=Vdrop
It is to be noted that motor has been selected to start up to 80% of rated voltage
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Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factorsCalculation
Full load current rating of the Feeder
Size of 16 Sq.mm 4 core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 16 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
2.7113.2*.2
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
KA/0.2SecIw =s
=13.2xt
16=
46
0.65
2.03 70x1x0.65
Reduction Factor
2.02Cable size
Rating factor for Ambient
Temperature 35C
0.86
2.01
=
1.06 =
1.01
1.05
= 2.44R1.04
0.0808
=
cos = 0.8
sin = 0.6
4Vdrop =
1
((0.00244 x 0.8) + (0.0000808 x 0.6))
V
x 20
Vdrop =
n
=Vdrop
IFL
Factor for grouping of cables
3 x V x 0.95x3 x 0.415
Current Rating at 35C
16 1.0 70 A
IFL
0.9
Factor for Non linear loads 0.8
3.01
3.00
1.03
1.02 VT =
3.03
1.07 =
=
1.00
Wet Type Fan in PCH MCC
20=L
2.00
2.23 / 0.8P
=
1.08 = 0.65
Lx(R cos+ X sin)x
0.16
x
15
A4=
0.415
2.23P
2.5
X
(Fuse Operated)
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With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop at normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 16 Sq.mm 4 core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
0.07 %240
0.96x 100 = 0.4 %
240
0.16x 100 =%Vdrop =
3.02
Iw =s
24
Vdrop
V
x=
Vdrop = 0.96
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
=16
= 2.71 KA/0.2Sec13.2xt 13.2*.2
Water Pump in B03 - PMC - 112
1.00
1.01 P = 1.5
1.02 VT = 0.415
1.03 L = 50
1.04 R = 2.44
1.05 X = 0.0808
1.06 = 2.5
3 x V x ==
2.00
2.01
3 A
0.95x3 x 0.415
1.5 / 0.8
IFL
P
=
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
16 1.0 70 A
Factor for grouping of cables 0.86
Reduction Factor 0.9
Factor for Non linear loads 0.8
0.65
1.07 = 15
1.08 = 0.65
Check for Starting Current
1
24 ( 6 Times the full load current)
((0.00244 x 0.8) + (0.0000808 x 0.6))
It is to be noted that motor has been selected to start up to 80% of rated voltage
3.03
%Vdrop =
x 20
(Fuse Operated)
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Current carrying capacity of 16 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 2.5% voltage drop hence ok
DOL or Squirrel Cage = A
Drop at the time of Starting
With in the Permissible limit of 15% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load kVA
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop %
Current derating factors
0.13 %240
1.8x 100 = 0.75 %
240
0.3x 100 =
= 5
1.07 = 0.65
1.06
100
1.03 L = 1100
0.129
1.00
1.01 P
GSS TO PCH MLDB
=
1.02 VT = 0.415
1.05 X = 0.0705
1.04 R =
2.03 70x1x0.65
46
3.00
3.01
IFL
Vdrop =
n
x (R cos+ X sin) x L
cos = 0.8
sin = 0.6
x 50
3
Vdrop =
1
0.3
x ((0.00244 x 0.8) + (0.0000808 x 0.6))
VVdrop
%Vdrop =
=
3.04 1 run of 1.1kV grade, 4C x16sq.mm, Al conducto r, Armoured, XLPE cable is selected
=16
= 2.71Iw =s
KA/0.2Sec13.2xt 13.2*.2
3.02 Check for Starting Current
18 ( 6 Times the full load current)
((0.00244 x 0.8) + (0.0000808 x 0.6))
1
Vdrop =
18
3.03
V
%Vdrop =
Vdrop =
(Fuse Operated)
It is to be noted that motor has been selected to start up to 80% of rated voltage
1.8
x 50x
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Calculation
Full load cur rent rating o f the Feeder
Size of 300 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
current carrying capacity of 300sq.mm,2Run cable == A
Check for voltage drop
Voltage drop
Where,
(Assumed)
With in the Permissible limit of 5% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load KVA
Voltage rating kV
Length of the cable m
AC resistance of the cable at 70C / kmReactance of the cable at 50Hz / km
Allowable Voltage Drop %
Current derating factors
4.64 %240
11.123x 100 =
1.07 = 0.65
1.06 = 2.5
1.05 X = 0.0821.04 R = 0.0648
1.03 L = 60
3 x 0.415
2.00
1.02 VT = 0.433
1.01 P = 2000
2.01
P
IFL =
3 x VA
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
100
= = 139
300 1.0 455 A
Factor for grouping of cables 0.86
Reduction Factor 0.9
Factor for Non leaner loads 0.8
0.65
2.03 455x2x0.65592
3.00
3.01
IFLVdrop =
n
x (R cos+ X sin) x L
cos = 0.8
sin = 0.6
x 1100
139Vdrop =
2
x ((0.000129 x 0.8) + (0.0000705 x 0.6))
V11.123Vdrop =
%Vdrop =
3.02
Iw =s
13.2xt
PCH TRANSFORMER TO PMCC
1.00
KA/0.2Sec
3.03 2 runs of 1.1kV grade, 3.5C x300 sq.mm, Al conduc tor, Armoured, XLPE cable is selected
=300
= 50.813.2*.2
(Fuse Operated)
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Calculation
Full load cur rent rating o f the Feeder
Size of 630 Sq.mm single core Aluminium cable is selected for checking.
(Ref : KEI INDUSTRIES LIMITED CATALOG PG.NO. 79)
=
=
=
Total factor to be applied for arriving the capacity =current carrying capacity of 630sq.mm,6Run cable =
= A
Check for voltage drop
Voltage drop
Where,
(Assumed)
With in the Permissible limit of 2.5% voltage drop hence ok
Short Time rating of the Cable
INPUT DATA
Feeder Load KVA
Voltage rating kVLength of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
6 runs of 1.1kV grade, 3x1x630 sq.mm+ 3Runs for Neutral ,Al conduc tor, Armoured, XLPE
cable is selected3.03
PCH TRANSFORMER TO PMCC ( FOR 50% OF LOAD )
1.00
2.695x 100 = 1.13 %
240
3.02
Iw =
=
1000
1.02 VT = 0.433
1.01 P =
1.03 L = 50
1.04 R = 0.129
1.05 X = 0.0705
KA/1Sec13.2xt 13.2*1
=630
= 47.7s
Vdrop
%Vdrop
= 2.695
x ((0.0000648 x 0.8) + (0.000082 x 0.6))
V
x 60
2667Vdrop =
6
0.8
sin = 0.6
cos =
x L
n
3175
3.00
3.01
IFLVdrop = x (R cos+ X sin)
Factor for Non leaner loads 0.8
0.65
2.03 814x6x0.65
Factor for grouping of cables 0.86
Reduction Factor 0.9
Current Rating at 35C
630 1.0 814 A
2.02Cable size
Rating factor for Ambient
Temperature 35C
= 2667 A
3 x V 3 x 0.433
2000
IFL = =
2.00
2.01
P
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Allowable Voltage Drop %
Current derating factors
Calculation
Full load cur rent rating o f the Feeder
Size of 300 Sq.mm 3.5 core Aluminium cable is selected for checking.
(Ref : KEI INDUSTRIES LIMITED CATALOG PG.NO. 79)
=
==
Total factor to be applied for arriving the capacity =
current carrying capacity of 300sq.mm,5Run cable =
= A
Check for voltage drop
Voltage drop
Where,
(Assumed)
With in the Permissible limit of 2.5% voltage drop hence ok
Short Time rating of the Cable
3.03 5 runs of 1.1kV grade, 3.5Cx300 sq.mm, Al conductor, Armoured, XLPE cable is selected
300= 22.7 KA/1Sec
13.2*1Iw =
s
0.65
1.06 = 2.5
1.07 =
2.00
2.01
P
IFL =3 x V
2.02Cable size
Rating factor for Ambient
Temperature 35C
300 1.0 455 A
3 x 0.433A
Current Rating at 35C
1000
= = 1333
Factor for grouping of cables 0.86
Reduction Factor 0.9
Factor for Non leaner loads 0.8
0.65
2.03 455x5x0.65
1479
3.00
3.01
IFLVdrop =
n
L
cos = 0.8
x (R cos+ X sin) x
sin = 0.6
1333Vdrop =
5
x ((0.000129 x 0.8) + (0.0000705 x 0.6)) x 50
Vdrop = 1.94 V
%Vdrop =1.94
x 100
240
= 0.81 %
3.02
=13.2xt
(Fuse Operated)
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INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop %
Calculation
Full load current rating of the Feeder
Size of 95 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 95 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
With in the Permissible limit of 5% voltage drop hence ok
Short Time rating of the Cable
3.03 1 run o f 1.1kV grade, 3.5C x95sq.mm, Al conductor, Armoured, XLPE cable is selected
13.2xt 13.2*.2Iw = (Fuse Operated)
= 4.54 %240
10.889x 100
LT CABLE SIZING CALCULATION
TOTAL POWER FOR +AL2 CABINET (OPERATING BALL MILL)
1.00
1.01 P = 65
1.02 VT = 0.415
1.03 L = 260
1.04 R = 0.409
1.05 X = 0.0724
1.06 = 5
= =
2.00
2.01
P= 113 A
3 x V 3 x 0.415
65 / 0.8IFL
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
95 1.0 221 A
Factor for grouping of cables 0.86
Reduction Factor 0.9
Factor for Non linear loads 0.8
0.65
2.03 221x1x0.65
144
3.00
3.01
IFL
Vdrop =
n
x (R cos+ X sin) x L
cos = 0.8
sin = 0.6
260113
Vdrop =1
x ((0.000409 x 0.8) + (0.0000724 x 0.6))
V
x
s
10.889
= 95 = 16.1 KA/0.2Sec
=
=
3.02
Vdrop
%Vdrop
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INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / km
Allowable Voltage Drop %
Calculation
Full load current rating of the Feeder
Size of 120 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 120 sq.mm1 Run Cable == A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
With in the Permissible limit of 5% voltage drop hence ok
Short Time rating of the Cable
3.03
= 4.54
TOTAL POWER FOR +AL1 CABINET (OPERATING BALL MILL)
1.00
1.01 P = 80
1.02 VT = 0.415
1.03 L = 260
1.04 R = 0.323
1.05 X = 0.0712
1.06 = 5
= =
2.00
2.01
P= 139 A
3 x V 3 x 0.415
80 / 0.8IFL
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
120 1.0 257 A
Factor for grouping of cables 0.86
Reduction Factor 0.9
Factor for Non linear loads 0.8
0.65
2.03257x1x0.65
167
3.00
3.01
IFL
Vdrop =
n
x (R cos+ X sin) x L
cos = 0.8
sin = 0.6
260139
Vdrop =1
x ((0.000323 x 0.8) + (0.0000712 x 0.6))
V
x
s
10.882
10.882
240x 100 %
3.02
=
=Vdrop
%Vdrop
1 run of 1.1kV grade, 3.5C x120sq.mm, Al conductor, Armoured, XLPE cable is selected
=120
= 20.3 KA/0.2Sec13.2xt 13.2*.2
Iw = (Fuse Operated)
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HZL-BTN-ELE-DS-SY-037
INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / kmAllowable Voltage Drop %
Calculation
Full load current rating of the Feeder
Size of 95 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 95 sq.mm1 Run Cable =
= A
Check for vo ltage drop
Voltage drop
Where,
(Assumed)
With in the Permissible limit of 5% voltage drop hence ok
Short Time rating of the Cable
x
Reduction Factor 0.9
%240
Factor for Non linear loads 0.8
0.65
L
0.8
x
= 104
TOTAL POWER FOR +AL2 CABINET (OPERATING SAG MILL)
1.00
1.01 P = 60
1.02 VT = 0.415
1.03 L = 245
1.04 R = 0.409
1.05 X = 0.0724
1.06 = 5
2.00
2.01
PA
3 x V 3 x 0.415
60 / 0.8IFL = =
2.02Cable size
Rating factor for Ambient
Temperature 35CCurrent Rating at 35C
95 1.0 221 A
Factor for grouping of cables 0.86
2.03 221x1x0.65
144
3.00
3.01
IFL
Vdrop =
n
(R cos+ X sin) x
sin = 0.6
cos =
245104
Vdrop =1
x ((0.000409 x 0.8) + (0.0000724 x 0.6))
V
x
s
9.444
9.444100 = 3.94
3.03
=
=
3.02
Vdrop
%Vdrop
1 run o f 1.1kV grade, 3.5C x95sq.mm, Al conductor, Armoured, XLPE cable is selected
=95
= 16.1 KA/0.2Sec13.2xt 13.2*.2
Iw =
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INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / kmReactance of the cable at 50Hz / km
Allowable Voltage Drop %
Calculation
Full load current rating of the Feeder
Size of 120 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 120 sq.mm1 Run Cable =
= ACheck for vo ltage drop
Voltage drop
Where,
(Assumed)
With in the Permissible limit of 5% voltage drop hence ok
Short Time rating of the Cable
%240
TOTAL POWER FOR +AL1 CABINET (OPERATING SAG MILL)
1.00
1.01 P = 80
1.02 VT = 0.415
1.03 L = 245
1.04 R = 0.3231.05 X = 0.0712
1.06 = 5
= =
2.00
2.01
P= 139 A
3 x V 3 x 0.415
80 / 0.8IFL
2.02Cable size
Rating factor for Ambient
Temperature 35C Current Rating at 35C
120 1.0 257 A
Factor for grouping of cables 0.86
Reduction Factor 0.9
Factor for Non linear loads 0.8
0.65
2.03 257x1x0.65
1673.00
3.01
IFL
Vdrop =
n
x (R cos+ X sin) x L
cos = 0.8
sin = 0.6
245139Vdrop =1
x ((0.000323 x 0.8) + (0.0000712 x 0.6))
V
x
s
10.255
10.255x 100 = 4.28
3.03
=
=
3.02
Vdrop
%Vdrop
KA/0.2Sec13.2xt 13.2*.2
Iw = = 20.3 (Fuse Operated)
1 run of 1.1kV grade, 3.5C x120sq.mm, Al conductor, Armoured, XLPE cable is selected
=120
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INPUT DATA
Feeder Load kW
Voltage rating kV
Length of the cable m
AC resistance of the cable at 90C / km
Reactance of the cable at 50Hz / kmAllowable Voltage Drop at normal running cond. %
Allowable Voltage Drop at Starting Condition %
Current derating factors
Calculation
Full load current rating of the Feeder
Size of 240 Sq.mm 3.5core Aluminium cable is selected for checking.
(Ref : Power Engineers Handbook 25.66, Table 57)
=
=
=
Total factor to be applied for arriving the capacity =
Current carrying capacity of 240 sq.mm2 Run Cable =
= ACheck for vo ltage drop
Voltage drop
Where,
(Assumed)
Voltage Drop at Normal Running Condition
With in the Permissible limit of 5% voltage drop hence ok
For VFD = A
Drop at the time of Startin
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