7/28/2019 LT Cable Sizing Calculation sheet
http://slidepdf.com/reader/full/lt-cable-sizing-calculation-sheet 1/12
-
-
-
-
-
-
-
Revised as per commentsNew Calculations
Client
Project
Department
Plan:SK LT CABLE S
Num: 3BYN4611
Checked by ROLLER PRESS-1
HSY
CEMENT MILLWritten by
Approved by
SRRCITY CEMENT
0 04.07.2011
Rev. DATE MO
B
A 19.08.2011
D -
C -
F -
E -
H -
G -
LT CABLE SIZING CALCULATION
J -
7/28/2019 LT Cable Sizing Calculation sheet
http://slidepdf.com/reader/full/lt-cable-sizing-calculation-sheet 2/12
S.No KW Efficiency P.F FLC
1 0.25 0.632 0.78 0.46 S.No Size Current in air AC Resistance at 90deg
2 0.37 0.653 0.78 0.68 1 3C x 2.5 24 9.48
3 0.55 0.724 0.81 0.98 2 3C x 4 36 5.9
4 0.75 0.735 0.8 1.35 3 3C x 6 47 3.94
5 1.1 0.761 0.8 1.98 4 3C x 10 39 3.7
6 1.5 0.782 0.81 2.67 5 3C x 16 50 2.29
7 2.2 0.803 0.86 3.69 6 3C x 25 63 1.44
8 3 0.824 0.86 5.04 7 3C x 35 77 1.04
9 4 0.835 0.86 6.71 8 3C x 50 95 0.77
10 5.5 0.851 0.85 9.34 9 3C x 70 115 0.53
11 7.5 0.867 0.87 12.44 10 3C x 95 140 0.38
12 11 0.899 0.83 19.13 11 3C x 120 155 0.3
13 15 0.906 0.84 25.78 12 3C x 150 175 0.25
14 18.5 0.917 0.85 31.42 13 3C x 185 200 0.2
15 22 0.921 0.85 37.36 14 3C x 240 235 0.15
16 30 0.926 0.83 52.17 15 3C x 300 280 0.12
17 37 0.934 0.84 63.58 16 3C x 400 290 0.09
18 45 0.94 0.85 76.42 Reference:
19 55 0.943 0.86 92.31 Grid india power cable
20 75 0.95 0.87 124.43
21 90 0.952 0.88 147.62
22 110 0.955 0.88 180.43
23 132 0.957 0.88 216.51
24 160 0.959 0.87 265.46
25 200 0.961 0.87 331.82
26 250 0.964 0.87 414.78 Derating Factors:
Variation in ambient temp. (50degC) 0.8
Reference: ABB Motor Catalogue Cable laid in air touching each other 0.75
Net derating factor 0.600
Motor Data Sheet COPPER XLPE, UNARMOURED POWER CABLES
4 and 3 Core Cu. Cable Data Sheet in Air
Page 3 of 12
7/28/2019 LT Cable Sizing Calculation sheet
http://slidepdf.com/reader/full/lt-cable-sizing-calculation-sheet 3/12
JK cement Al
50 deg .C
SL.NO Motor KW Starting P.FCOS fStartingSIN f
StartingCurrent StartingZ
Operating
P.FCOS f
SIN f Efficiency Full LoCurrent
1 0.25 0.8 0.6 2.78 7.643 0.78 0.63 0.63 0.46
2 0.37 0.72 0.69 4.11 6.894 0.78 0.63 0.65 0.68
3 0.37 0.72 0.69 4.11 4.312 0.78 0.63 0.65 0.68
4 0.55 0.7 0.71 5.88 6.706 0.81 0.59 0.72 0.98
5 0.55 0.7 0.71 5.88 4.196 0.81 0.59 0.72 0.98
7 0.75 0.65 0.76 8.12 6.237 0.8 0.60 0.74 1.35
8 0.75 0.65 0.76 8.12 3.905 0.8 0.60 0.74 1.35
9 0.75 0.65 0.76 8.12 2.628 0.8 0.60 0.74 1.35
10 1.1 0.63 0.78 11.91 6.049 0.8 0.60 0.76 1.98
11 1.1 0.63 0.78 11.91 3.789 0.8 0.60 0.76 1.98
12 1.1 0.63 0.78 11.91 2.551 0.8 0.60 0.76 1.98
13 1.1 0.63 0.78 11.91 2.409 0.8 0.60 0.76 1.98
14 1.5 0.53 0.85 16.04 5.108 0.81 0.59 0.78 2.67
15 1.5 0.53 0.85 16.04 3.206 0.81 0.59 0.78 2.67
16 1.5 0.53 0.85 16.04 2.163 0.81 0.59 0.78 2.67
17 1.5 0.53 0.85 16.04 2.046 0.81 0.59 0.78 2.67
17a 1.5 0.53 0.85 16.04 2.046 0.81 0.59 0.78 2.67
18 2.2 0.49 0.87 22.15 4.731 0.86 0.51 0.80 3.69
19 2.2 0.49 0.87 22.15 2.972 0.86 0.51 0.80 3.69
20 2.2 0.49 0.87 22.15 2.008 0.86 0.51 0.80 3.69
21 2.2 0.49 0.87 22.15 1.900 0.86 0.51 0.80 3.69
22 2.2 0.49 0.87 22.15 1.206 0.86 0.51 0.80 3.69
LT POWER CABLE SIZING FO
Temperature
Pa
7/28/2019 LT Cable Sizing Calculation sheet
http://slidepdf.com/reader/full/lt-cable-sizing-calculation-sheet 4/12
JK cement Al
50 deg .C
SL.NO Motor KW Starting P.FCOS f
StartingSIN f
StartingCurrent StartingZ
Operating
P.FCOS f
SIN f Efficiency Full LoCurrent
LT POWER CABLE SIZING FO
Temperature
23 3 0.45 0.89 30.21 4.354 0.86 0.51 0.82 5.04
24 3 0.45 0.89 30.21 2.738 0.86 0.51 0.82 5.04
25 3 0.45 0.89 30.21 1.852 0.86 0.51 0.82 5.04
26 3 0.45 0.89 30.21 1.754 0.86 0.51 0.82 5.04
27 3 0.45 0.89 30.21 1.117 0.86 0.51 0.82 5.04
28 3 0.45 0.89 30.21 0.734 0.86 0.51 0.82 5.04
29 4 0.38 0.92 40.28 3.693 0.86 0.51 0.84 6.7130 4 0.38 0.92 40.28 2.327 0.86 0.51 0.84 6.71
31 4 0.38 0.92 40.28 1.579 0.86 0.51 0.84 6.71
32 4 0.38 0.92 40.28 1.498 0.86 0.51 0.84 6.71
33 4 0.38 0.92 40.28 0.959 0.86 0.51 0.84 6.71
34 4 0.38 0.92 40.28 0.636 0.86 0.51 0.84 6.71
35 5.5 0.32 0.95 56.04 3.127 0.85 0.53 0.85 9.34
36 5.5 0.32 0.95 56.04 1.976 0.85 0.53 0.85 9.34
37 5.5 0.32 0.95 56.04 1.345 0.85 0.53 0.85 9.34
38 5.5 0.32 0.95 56.04 1.279 0.85 0.53 0.85 9.34
39 5.5 0.32 0.95 56.04 0.825 0.85 0.53 0.85 9.34
40 5.5 0.32 0.95 56.04 0.553 0.85 0.53 0.85 9.34
41 5.5 0.32 0.95 56.04 0.425 0.85 0.53 0.85 9.34
43 7.5 0.31 0.95 75.00 1.917 0.87 0.49 0.87 12.5
44 7.5 0.31 0.95 75.00 1.305 0.87 0.49 0.87 12.5
45 7.5 0.31 0.95 75.00 1.242 0.87 0.49 0.87 12.5
46 7.5 0.31 0.95 75.00 0.802 0.87 0.49 0.87 12.5
47 7.5 0.31 0.95 75.00 0.539 0.87 0.49 0.87 12.5
48 7.5 0.31 0.95 75.00 0.415 0.87 0.49 0.87 12.5
49 7.5 0.31 0.95 75.00 0.328 0.87 0.49 0.87 12.5
P
7/28/2019 LT Cable Sizing Calculation sheet
http://slidepdf.com/reader/full/lt-cable-sizing-calculation-sheet 5/12
JK cement Al
50 deg .C
SL.NO Motor KW Starting P.FCOS f
StartingSIN f
StartingCurrent StartingZ
Operating
P.FCOS f
SIN f Efficiency Full LoCurrent
LT POWER CABLE SIZING FO
Temperature
50 11 0.34 0.94 111.60 2.093 0.83 0.56 0.90 18.6
51 11 0.34 0.94 111.60 1.423 0.83 0.56 0.90 18.6
52 11 0.34 0.94 111.60 1.352 0.83 0.56 0.90 18.6
53 11 0.34 0.94 111.60 0.870 0.83 0.56 0.90 18.6
54 11 0.34 0.94 111.60 0.581 0.83 0.56 0.90 18.6
55 11 0.34 0.94 111.60 0.445 0.83 0.56 0.90 18.6
56 11 0.34 0.94 111.60 0.350 0.83 0.56 0.90 18.657 11 0.34 0.94 111.60 0.265 0.83 0.56 0.90 18.6
58 11 0.34 0.94 111.60 0.214 0.83 0.56 0.90 18.6
59 15 0.32 0.95 153.00 1.279 0.84 0.54 0.91 25.5
60 15 0.32 0.95 153.00 0.825 0.84 0.54 0.91 25.5
61 15 0.32 0.95 153.00 0.553 0.84 0.54 0.91 25.5
62 15 0.32 0.95 153.00 0.425 0.84 0.54 0.91 25.5
63 15 0.32 0.95 153.00 0.336 0.84 0.54 0.91 25.5
64 15 0.32 0.95 153.00 0.255 0.84 0.54 0.91 25.5
65 15 0.32 0.95 153.00 0.207 0.84 0.54 0.91 25.5
66 18.5 0.37 0.93 186.00 1.462 0.85 0.53 0.92 31
67 18.5 0.37 0.93 186.00 0.938 0.85 0.53 0.92 31
68 18.5 0.37 0.93 186.00 0.623 0.85 0.53 0.92 31
69 18.5 0.37 0.93 186.00 0.475 0.85 0.53 0.92 31
70 18.5 0.37 0.93 186.00 0.372 0.85 0.53 0.92 31
71 18.5 0.37 0.93 186.00 0.280 0.85 0.53 0.92 31
72 18.5 0.37 0.93 186.00 0.224 0.85 0.53 0.92 31
73 18.5 0.37 0.93 186.00 0.192 0.85 0.53 0.92 31
74 22 0.35 0.94 224.40 0.893 0.85 0.53 0.92 37.4
P
7/28/2019 LT Cable Sizing Calculation sheet
http://slidepdf.com/reader/full/lt-cable-sizing-calculation-sheet 6/12
JK cement Al
50 deg .C
SL.NO Motor KW
Starting P.FCOS f
StartingSIN f
StartingCurrent
StartingZ
Operating
P.FCOS f
SIN f Efficiency Full LoCurrent
LT POWER CABLE SIZING F
Temperature
75 22 0.35 0.94 224.40 0.595 0.85 0.53 0.92 37.4
76 22 0.35 0.94 224.40 0.455 0.85 0.53 0.92 37.4
77 22 0.35 0.94 224.40 0.358 0.85 0.53 0.92 37.4
78 22 0.35 0.94 224.40 0.270 0.85 0.53 0.92 37.4
79 22 0.35 0.94 224.40 0.218 0.85 0.53 0.92 37.4
80 22 0.35 0.94 224.40 0.187 0.85 0.53 0.92 37.4
81 22 0.35 0.94 224.40 0.169 0.85 0.53 0.92 37.4
82 22 0.35 0.94 224.40 0.152 0.85 0.53 0.92 37.4
83 30 0.34 0.94 288.00 0.581 0.83 0.56 0.93 48
84 30 0.34 0.94 288.00 0.445 0.83 0.56 0.93 48
85 30 0.34 0.94 288.00 0.350 0.83 0.56 0.93 48
86 30 0.34 0.94 288.00 0.265 0.83 0.56 0.93 48
87 30 0.34 0.94 288.00 0.214 0.83 0.56 0.93 48
88 30 0.34 0.94 288.00 0.184 0.83 0.56 0.93 48
89 30 0.34 0.94 288.00 0.167 0.83 0.56 0.93 48
90 30 0.34 0.94 288.00 0.150 0.83 0.56 0.93 48
91 30 0.34 0.94 288.00 0.133 0.83 0.56 0.93 48
92 30 0.34 0.94 288.00 0.122 0.83 0.56 0.93 48
93 37 0.29 0.96 360.00 0.395 0.84 0.54 0.93 60
94 37 0.29 0.96 360.00 0.314 0.84 0.54 0.93 60
95 37 0.29 0.96 360.00 0.240 0.84 0.54 0.93 60
96 37 0.29 0.96 360.00 0.197 0.84 0.54 0.93 60
97 37 0.29 0.96 360.00 0.171 0.84 0.54 0.93 60
98 37 0.29 0.96 360.00 0.156 0.84 0.54 0.93 60
99 37 0.29 0.96 360.00 0.142 0.84 0.54 0.93 60
100 37 0.29 0.96 360.00 0.127 0.84 0.54 0.93 60
101 37 0.29 0.96 360.00 0.117 0.84 0.54 0.93 60
P
7/28/2019 LT Cable Sizing Calculation sheet
http://slidepdf.com/reader/full/lt-cable-sizing-calculation-sheet 7/12
7/28/2019 LT Cable Sizing Calculation sheet
http://slidepdf.com/reader/full/lt-cable-sizing-calculation-sheet 8/12
JK cement Al
50 deg .C
SL.NO Motor KW
Starting P.FCOS f
StartingSIN f
StartingCurrent
StartingZ
Operating
P.FCOS f
SIN f Efficiency Full LoCurrent
LT POWER CABLE SIZING F
Temperature
128 75 0.37 0.93 720.00 0.087 0.87 0.49 0.95 120
129 75 0.37 0.93 720.00 0.077 0.87 0.49 0.95 120
130 75 0.37 0.93 720.00 0.068 0.87 0.49 0.95 120
131 75 0.37 0.93 720.00 0.062 0.87 0.49 0.95 120
132 75 0.37 0.93 720.00 0.052 0.87 0.49 0.95 120
133 90 0.37 0.93 885.73 0.192 0.88 0.47 0.95 147.6
134 90 0.37 0.93 885.73 0.173 0.88 0.47 0.95 147.6135 90 0.37 0.93 885.73 0.155 0.88 0.47 0.95 147.6
136 90 0.37 0.93 885.73 0.136 0.88 0.47 0.95 147.6
137 90 0.37 0.93 885.73 0.124 0.88 0.47 0.95 147.6
138 90 0.37 0.93 885.73 0.087 0.88 0.47 0.95 147.6
139 90 0.37 0.93 885.73 0.077 0.88 0.47 0.95 147.6
140 90 0.37 0.93 885.73 0.068 0.88 0.47 0.95 147.6
141 90 0.37 0.93 885.73 0.062 0.88 0.47 0.95 147.6
142 90 0.37 0.93 885.73 0.052 0.88 0.47 0.95 147.6
143 90 0.37 0.93 885.73 0.045 0.88 0.47 0.95 147.6
144 110 0.19 0.98 1082.56 0.123 0.88 0.47 0.96 180.4
145 110 0.19 0.98 1082.56 0.114 0.88 0.47 0.96 180.4
146 110 0.19 0.98 1082.56 0.107 0.88 0.47 0.96 180.4
147 110 0.19 0.98 1082.56 0.066 0.88 0.47 0.96 180.4
148 110 0.19 0.98 1082.56 0.062 0.88 0.47 0.96 180.4
149 110 0.19 0.98 1082.56 0.057 0.88 0.47 0.96 180.4
150 110 0.19 0.98 1082.56 0.054 0.88 0.47 0.96 180.4
151 110 0.19 0.98 1082.56 0.041 0.88 0.47 0.96 180.4
152 110 0.19 0.98 1082.56 0.038 0.88 0.47 0.96 180.4
153 110 0.19 0.98 1082.56 0.036 0.88 0.47 0.96 180.4
P
7/28/2019 LT Cable Sizing Calculation sheet
http://slidepdf.com/reader/full/lt-cable-sizing-calculation-sheet 9/12
JK cement A
50 deg .C
SL.NO Motor KW
Starting P.FCOS f
StartingSIN f
StartingCurrent
StartingZ
Operating
P.F
COS f
SIN f Efficiency Full LCurren
LT POWER CABLE SIZING F
Temperature
154 132 0.2 0.98 1299.08 0.115 0.88 0.47 0.96 216.
155 132 0.2 0.98 1299.08 0.108 0.88 0.47 0.96 216.
156 132 0.2 0.98 1299.08 0.094 0.88 0.47 0.96 216.
157 132 0.2 0.98 1299.08 0.063 0.88 0.47 0.96 216.
158 132 0.2 0.98 1299.08 0.058 0.88 0.47 0.96 216.
159 132 0.2 0.98 1299.08 0.054 0.88 0.47 0.96 216.
160 132 0.2 0.98 1299.08 0.042 0.88 0.47 0.96 216.
161 132 0.2 0.98 1299.08 0.038 0.88 0.47 0.96 216.162 132 0.2 0.98 1299.08 0.036 0.88 0.47 0.96 216.
163 132 0.2 0.98 1299.08 0.029 0.88 0.47 0.96 216.
164 160 0.2 0.98 1592.74 0.108 0.87 0.49 0.96 265.
165 160 0.2 0.98 1592.74 0.068 0.87 0.49 0.96 265.
166 160 0.2 0.98 1592.74 0.063 0.87 0.49 0.96 265.
167 160 0.2 0.98 1592.74 0.058 0.87 0.49 0.96 265.
168 160 0.2 0.98 1592.74 0.054 0.87 0.49 0.96 265.
169 160 0.2 0.98 1592.74 0.042 0.87 0.49 0.96 265.
170 160 0.2 0.98 1592.74 0.038 0.87 0.49 0.96 265.
171 160 0.2 0.98 1592.74 0.036 0.87 0.49 0.96 265.
172 160 0.2 0.98 1592.74 0.029 0.87 0.49 0.96 265.
173 200 0.2 0.98 1860.00 0.068 0.87 0.49 0.96 310
174 200 0.2 0.98 1860.00 0.063 0.87 0.49 0.96 310
175 200 0.2 0.98 1860.00 0.058 0.87 0.49 0.96 310
176 200 0.2 0.98 1860.00 0.054 0.87 0.49 0.96 310
177 200 0.2 0.98 1860.00 0.042 0.87 0.49 0.96 310
178 200 0.2 0.98 1860.00 0.038 0.87 0.49 0.96 310
179 200 0.2 0.98 1860.00 0.036 0.87 0.49 0.96 310
180 200 0.2 0.98 1860.00 0.029 0.87 0.49 0.96 310
181 200 0.2 0.98 1860.00 0.027 0.87 0.49 0.96 310
182 200 0.2 0.98 1860.00 0.022 0.87 0.49 0.96 310
183 250 0.16 0.99 2488.65 0.055 0.87 0.49 0.96 414.
184 250 0.16 0.99 2488.65 0.052 0.87 0.49 0.96 414.
185 250 0.16 0.99 2488.65 0.039 0.87 0.49 0.96 414.
186 250 0.16 0.99 2488.65 0.037 0.87 0.49 0.96 414.
187 250 0.16 0.99 2488.65 0.035 0.87 0.49 0.96 414.
188 250 0.16 0.99 2488.65 0.028 0.87 0.49 0.96 414.
189 250 0.16 0.99 2488.65 0.026 0.87 0.49 0.96 414.
190 250 0.16 0.99 2488.65 0.022 0.87 0.49 0.96 414.
191 250 0.16 0.99 2488.65 0.021 0.87 0.49 0.96 414.
7/28/2019 LT Cable Sizing Calculation sheet
http://slidepdf.com/reader/full/lt-cable-sizing-calculation-sheet 10/12
CITY CEME
ROLLER PRE
50 100 150 200 250 300
1 0.25 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5
2 0.37 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5
3 0.55 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5
4 0.75 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5
5 1.1 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5
6 1.5 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5
7 2.2 4C x 2.5 4C x 2.5 4C x 2.5 4C x 2.5 4C x 4 4C x 4
8 3 4C x 2.5 4C x 2.5 4C x 2.5 4C x 4 4C x 4 4C x 6
9 4 4C x 2.5 4C x 2.5 4C x 4 4C x 4 4C x 6 4C x 6
10 5.5 4C x 2.5 4C x 2.5 4C x 4 4C x 6 4C x 10 4C x 10
11 7.5 4C x 4 4C x 4 4C x 6 4C x 10 4C x 10 4C x 16
12 11 4C x 4 4C x 6 4C x 10 4C x 10 4C x 16 4C x 16
13 15 4C x 10 4C x 10 4C x 16 4C x 16 3.5C x 25 3.5C x 2
14 18.5 4C x 10 4C x 10 4C x 16 3.5C x 25 3.5C x 25 3.5C x 3
15 22 4C x 16 4C x 16 4C x 16 3.5C x 25 3.5C x 35 3.5C x 3
16 30 3.5C x 25 3.5C x 25 3.5C x 25 3.5C x 35 3.5C x 35 3.5C x 5
17 37 3.5C x 35 3.5C x 35 3.5C x 35 3.5C x 35 3.5C x 50 3.5C x 7
18 45 3.5C x 50 3.5C x 50 3.5C x 50 3.5C x 50 3.5C x 70 3.5C x 7
19 55 3.5C x 70 3.5C x 70 3.5C x 70 3.5C x 70 3.5C x 95 3.5C x 9
20 75 3.5C x 95 3.5C x 95 3.5C x 95 3.5C x 95 3.5C x 120 3.5C x 18
21 90 3.5C x 120 3.5C x 120 3.5C x 120 3.5C x 120 3.5C x 185 3.5C x 30
22 110 3.5C x 185 3.5C x 185 3.5C x 185 3.5C x 185 3.5C x 240 2#3.5C x 1
23 132 3.5C x 240 3.5C x 240 3.5C x 240 3.5C x 240 2#3.5C x 150 2#3.5C x 1
24 160 3.5C x 300 3.5C x 300 3.5C x 300 2#3.5C x 150 2#3.5C x 150 2#3.5C x 1
25 200 2#3.5C x 150 2#3.5C x 150 2#3.5C x 150 2#3.5C x 150 2#3.5C x 150 2#3.5C x 1
26 250 2#3.5C x 240 2#3.5C x 240 2#3.5C x 240 2#3.5C x 240 2#3.5C x 240 2#3.5C x 2
Note: 1. All the cables are aluminium conductors2. Deration factor considered in 0.60 (0.8*0.75)
KWCABLE LE
LT POWER CABLE SIZING FOR VAR
(STEADY STATE VOLTAGE DR
SUMMARY TABLE FOR DIFFER
SL.NO
Doc.No.:3BYN4611003-SAA
7/28/2019 LT Cable Sizing Calculation sheet
http://slidepdf.com/reader/full/lt-cable-sizing-calculation-sheet 11/12
LENGTH OF CABLE 820
VOLTAGE 415
IST 15.66
COS STT 0.53
SIN STT 0.84
VOLTAGE DROP STARTING 10.9597 = 1.732 x I start x length of cable x (R Cos sta
LENGTH OF CABLE 820
VOLTAGE 415
R X
3.7 0.1
IFLC 2.61COS RUNG 0.81
SIN RUNG 0.586
VOLTAGE DROP RUNNING 2.729296