7271024 motor feeder cable voltage drop

8/6/2019 7271024 Motor Feeder Cable Voltage Drop

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PROJECT: VSP BF-3 DOCUMENT NO REV DATE

E 23/10/2008

LT CABLE SIZING CALCULATION

DESIGNED CHECKED SHEET

TITLE: ACH MMR A4

### kw MCC-WT PROX. LENG 210m

Parameter Basis / Formula Used Value Unit Symbol

Motor rating / Total Load 15 15 Kw Mr

Demand Factor Assumed 1 FConsumed Load Mr / F 15 Kw Mc

Refer motor catalogue 0.83

0.56

Assumed 0.30

0.95

Consumed Load Efficiency Refer motor catalogue 0.9

Load in kVA 20.08 kVA P

System Voltage 415 Volts V

Sytem Voltage for calculation Vs= V X (1 - 0.60%) 412.51 Volts Vs

Full Load Current (P x 1000) / (1.732 x Vs) 28.11 Amps I flc

Temperature Deration (refer Table - A) 0.9 TDF

Grouping Deration (refer Table - B) 0.68 GDF

Other Derating Factor 1 RDF

Total Derating Factor TDFx GDF x RDF 0.61 DF

Running Current after derations I flc / DF 45.92 Amps Ir

Current carrying capacity(refer catalogue) 63 Amps Ic

3cx25 PVC AL

No. of Runs of cable Ir / Ic 0.73

No. of runs of selected cable 1 No. N

Using 210 Mtr cable, Actual % Voltage drop w.r.t 415V = 3.08% 3.68in 5% voltage dro

Check for voltage drop

Allowable voltage drop (%) starting 15 % %Vdsa

Allowable voltage drop (%) running 4.40 % %VdraAllowable voltage drop at starting Vs x %Vdsa/100 61.877 Volt Vdsa

Allowable voltage drop at running Vs x %Vdra/100 18.150 Volt Vdra

Max. Conductor Resistance at 70 degC (refer cable catalogue) 1.44 Ohm / km R

Reactance at 50 c/s (refer cable catalogue) 0.1 Ohm / km Xl

Running current Full load current ( Iflc ) 28.11 Amps Ir

Starting current 7.2 x Ir 202.36 Amps Is

Max. length for starting condition 336 Mtrs

Max. length for running condition 298 Mtrs

Hence, Cable Size Selected (As per Calculation) 1 3cx25 PVC AL

Table - A (Temp. Derating factor) Table - B (Grouping factor)

Deg C PVCNo. of Trays

1 2 3 4 6 8

25 1.25 1.16 1.14 1.14 1.28 1 1 1 1 1 1 1

30 1.16 1.1 1.1 1.1 1.22 2 0.84 0.8 0.78 0.77 0.76 0.75

35 1.09 1.05 1.04 1.04 1.13 3 0.8 0.76 0.74 0.73 0.72 0.71

40 1 1 1 1 1 4 0.78 0.74 0.72 0.71 0.7 0.69

45 0.9 0.94 0.95 0.95 0.98 5 0.77 0.73 0.7 0.69 0.68 0.67

50 0.8 0.88 0.9 0.9 0.88 6 0.75 0.71 0.7 0.68 0.68 0.66

55 0.69 0.82 0.85 0.85 0.77 7 0.74 0.69 0.68 0.66 0.66 0.64

60 0.62 0.74 0.8 0.8 0.66 8 0.73 0.69 0.68 0.67 0.66 0.64

1 R- 3cx25 Sqmm is found to be OK.

BLT HydraulicSystem- FillingPump

SOURCE:

Running cos (consumed load) cos r

Running sin sin r

Starting cos cos s

Starting sin sin s

r

Mc / (cos r x r)

(Vdsa x N) / (1.732 x Is x (Rcos s + Xl sin

s))(Vdra x N) / (1.732 x Ir x (Rcos r + Xl sin

r))

HRPVC

LTXLPE

HTXLPE

EPRCSP

No. ofcables/ tray

Note:A) As per above calculation, the Cable Size of


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GN-ST-06(Design Sheet)

(i) Two formats of design sheets are enclosed. These sheets can be used as per the

(ii) The designed and checked columns of design sheet shall have the signature oresponsible for design & checking respectively.


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convenience.

f the person


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STANDARD MOTOR RATINGS FLPF 3/4THPF FLEFF 3/4THEFF

1 0.18 0.65 0.58 0.5 0.46

2 0.22 0.6 0.55 0.58 0.53

3 0.37 0.64 0.58 0.65 0.58

4 0.55 0.7 0.64 0.72 0.67

5 0.75 0.7 0.65 0.74 0.69

6 1.1 0.76 0.7 0.75 0.77 1.5 0.79 0.72 0.77 0.72

8 2.2 0.82 0.76 0.8 0.75

9 3.7 0.83 0.78 0.82 0.81

10 5.5 0.84 0.79 0.85 0.83

11 7.5 0.85 0.81 0.87 0.87

12 9.3 0.85 0.81 0.88 0.88

13 11 0.85 0.82 0.89 0.89

14 15 0.86 0.83 0.9 0.9

15 18.5 0.86 0.84 0.91 0.91

16 22 0.87 0.84 0.91 0.91

17 30 0.89 0.86 0.92 0.92

18 37 0.9 0.89 0.93 0.93

19 45 0.9 0.89 0.93 0.93

20 55 0.86 0.82 0.94 0.94

21 75 0.89 0.88 0.94 0.94

22 90 0.9 0.86 0.95 0.95

23 110 0.9 0.86 0.95 0.95

24 132 0.9 0.86 0.95 0.95

25 160 0.9 0.86 0.95 0.95

26 180 0.9 0.86 0.95 0.95

27 200 0.9 0.86 0.96 0.96

28 225 0.87 0.82 0.95 0.94

29 250 0.87 0.82 0.95 0.94

SYSTEM VOLTAGE

1 240

2 415

3 1100

4 3300

5 6600

6 11000

7 33000

1 2 3 4 5 6

CABLE DATA

CURRENT RATING AT 40 DE

X-SECTION PVC HRPVC LT X

AL CU AL CU AL

1 3cx1.5 14 17 16 21


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2 3cx2.5 18 24 22 29

3 3cx4 23 30 28 37 31

4 3cx6 30 39 37 48 50

5 3cx10 39 57 49 63 67

6 3cx16 50 65 62 81 70

7 3cx25 63 66 85 110 96

8 3cx35 77 110 105 134 1179 3cx50 95 135 128 165 142

10 3cx70 130 155 159 201 179

11 3cx95 155 200 189 244 221

12 3cx120 180 230 220 281 257

13 3cx150 205 255 250 323 292

14 3cx185 240 305 293 372 337

15 3cx225 255 335 323 407 379

16 3cx240 280 355 342 433 399

17 3cx300 315 400 384 488 455

18 3cx400 375 455 458 555 530

19 3cx500 425 521 519 635 612

20 3cx630 480 674 586 759 707

21 1cx120 220 280 268 342 268

22 1cx150 250 320 305 390 309

23 1cx185 290 370 354 451 360

24 1cx225 315 400 390 483 408

25 1cx240 335 425 409 519 433

26 1cx300 380 475 464 580 501

27 1cx400 435 550 531 671 596

28 1CX500 480 590 586 720 693

29 1cx630 550 660 671 805 814

current rating

CABLE TYPE AL CU1 PVC 63 66

2 HRPVC 85 110

3 LT XLPE 96 108

4 HT XLPE 100 115

5 EPR CSP 0 113.98

CONDUCTOR current

1 AL 63

2 CU 66

1 2 3 4 5 6

CABLE DATA

CONDUCTOR RESISTA


AL CU AL CU AL

1 3cx1.5 21.747 14.480 21.720 12.200 23.170


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2 3cx2.5 14.538 8.870 14.520 7.560 15.500

3 3cx4 8.903 5.520 8.890 4.700 9.480

4 3cx6 5.539 3.685 5.530 3.110 5.900

5 3cx10 3.701 2.190 3.700 1.840 3.940

6 3cx16 2.295 1.376 2.290 1.160 2.440

7 3cx25 1.442 0.870 1.440 0.734 1.540

8 3cx35 1.043 0.627 1.042 0.529 1.1109 3cx50 0.770 0.463 0.770 0.391 q

10 3cx70 0.532 0.321 0.532 0.270 0.567

11 3cx95 0.384 0.231 0.385 0.195 0.410

12 3cx120 0.304 0.183 0.304 0.154 0.324

13 3cx150 0.248 0.148 0.248 0.126 0.264

14 3cx185 0.197 0.119 0.198 0.100 0.210

15 3cx240 0.150 0.090 0.152 0.076 0.160

16 3cx300 0.120 0.072 0.122 0.061 0.128

17 3cx400 0.094 0.056 0.096 0.048 0.100

18 3cx500 0.073 0.044 0.076 0.037 0.077

19 3cx630 0.056 0.034 0.061 0.029 0.060

20 1cx120 0.304 0.154 0.324

21 1cx150 0.248 0.126 0.264

22 1cx185 0.198 0.100 0.210

23 1cx225 0.171 0.850 0.180

24 1cx240 0.152 0.076 0.160

25 1cx300 0.122 0.061 0.128

26 1cx400 0.096 0.048 0.100

27 1CX500 0.076 0.037 0.077

28 1cx630 0.061 0.029 0.060

1 2 3 4 5 6

CABLE DATA

CONDUCTOR REACT


AL CU AL CU AL

1 3cx1.5 0.126 0.119 0.092 0.109 0.107

2 3cx2.5 0.119 0.115 0.087 0.105 0.099

3 3cx4 0.116 0.112 0.081 0.101 0.093

4 3cx6 0.110 0.104 0.073 0.095 0.088

5 3cx10 0.100 0.099 0.064 0.089 0.084

6 3cx16 0.097 0.090 0.055 0.086 0.081

7 3cx25 0.097 0.088 0.054 0.084 0.081

8 3cx35 0.097 0.086 0.050 0.082 0.078

9 3cx50 0.094 0.086 0.050 0.079 0.07510 3cx70 0.090 0.083 0.046 0.076 0.074

11 3cx95 0.090 0.083 0.043 0.076 0.072

12 3cx120 0.087 0.082 0.042 0.074 0.071

13 3cx150 0.087 0.082 0.042 0.074 0.072

14 3cx185 0.087 0.082 0.042 0.074 0.072

15 3cx240 0.087 0.079 0.041 0.073 0.071

16 3cx300 0.086 0.079 0.040 0.073 0.071

17 3cx400 0.086 0.079 0.040 0.073 0.070


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18 3cx500 0.079 0.079 0.040 0.073 0.070

19 3cx630 - - 0.040 0.725 0.070

20 1cx120 0.087 0.074 0.080 0.074 0.097

21 1cx150 0.086 0.074 0.082 0.074 0.094

22 1cx185 0.085 0.074 0.079 0.074 0.093

23 1cx225 0.084 0.074 0.077 0.074 0.091

24 1cx240 0.083 0.073 0.075 0.073 0.09025 1cx300 0.083 0.073 0.072 0.073 0.088

26 1cx400 0.082 0.073 0.070 0.073 0.087

27 1CX500 0.081 0.073 0.069 0.073 0.086

28 1cx630 0.081 0.725 0.067 0.725 0.084

resistance

CABLE TYPE AL CU

1 PVC 1.44 0.87

2 HRPVC 1.44 0.73

3 LT XLPE 1.54 0.93

4 HT XLPE 1.54 0.93

5 EPR CSP 0 0.8

CONDUCTOR res.

1 AL 1.44

2 CU 0.87

reactance

CABLE TYPE AL CU

1 PVC 0.1 0.09

2 HRPVC 0.05 0.08

3 LT XLPE 0.08 0.08

4 HT XLPE 0.12 0.12

5 EPR CSP 0 0.09

CONDUCTOR reac.

1 AL 0.1

2 CU 0.09

NO. OF RUNS

1 1

2 2

3 3

4 4

5 5

6 6

7 7

8 8

9 9

10 10

11 11

12 12

13 13


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14 14

15 15

16 16

17 17

18 18

19 19

20 20

1 MCC-MUDGUN 0.79 0.01

2 MCC-BF-BLT 0.59 0.01

3 MCC-GC 0.82 0.01

4 MCC-HS 0.65 0.01

5 MCC-TRT 1.35 0.01

6 MCC-PCI-1 0.88 0.01

7 MCC-PCI-2 0.95 0.01

8 MCC-PCI-COM 1.17 0.01

9 MCC-FF 1.62 0.02

10 MCC-CHILLER 1.65 0.02

11 MCC-SGPN 0.88 0.01

12 MCC-SGP-COM1 0.76 0.01

13 MCC-SGP-COM2 0.76 0.01

14 MCC-SGPS 0.66 0.01

15 MCC-CH-DED 0.64 0.01

16 MCC-WS1 0.55 0.01

17 MCC-WS2 0.74 0.01

18 MCC-WT 0.6 0.01

19 MCC-SH-1 0.42 0

20 MCC-SH-2 0.36 021 MCC-SH-COM 0.76 0.01

22 MCC-SH-DED 0.59 0.01

23 EME-MCC-BF 0.58 0.01

24 EME-MCC-PH 0.54 0.01


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7 8 9 10

G (LAID IN TUNNEL)

LPE HT XLPE -upto 6.6kv(E) EPR CSP

CU AL CU CU


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26

36 35

47 46

62 64

79 85

108 100 115 114

132 121 140 140162 145 175 175

198 181 215 216

240 221 255 260

276 254 290 303

318 290 335 349

366 330 370 398

402 369 415 372

426 390 440 348

480 450 505 325

546 525 600 304

612 609 714 284

685 706 850 265

336 277 368 299

384 318 422 343

444 370 490 391

479 412 547 366

510 440 580 342

570 509 665 320

660 600 805 299

708 700 900 279

825 817 1030 261

7 8 9 10

NCE AT 70 DEG


CU AL CU CU

15.500


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9.480 8.210

5.900 5.090

3.940 3.390

2.340 1.950

1.470 1.240

0.930 1.540 0.930 0.795

0.671 1.110 0.671 0.5650.495 0.820 0.495 0.393

0.343 0.567 0.343 0.277

0.247 0.410 0.247 0.210

0.196 0.324 0.196 0.164

0.159 0.264 0.159 0.132

0.127 0.210 0.127 0.108

0.096 0.160 0.096 0.082

0.077 0.130 0.077 0.065

0.060 0.100 0.060 0.040

0.047 0.077 0.047 0.039

0.036 0.060 0.036 0.031

0.196 0.324 0.196 0.164

0.159 0.264 0.159 0.132

0.127 0.210 0.127 0.108

0.107 0.180 0.110 0.093

0.096 0.160 0.096 0.082

0.077 0.130 0.077 0.065

0.060 0.100 0.060 0.040

0.047 0.077 0.047 0.039

0.036 0.060 0.036 0.031

7 8 9 10

NCE AT 50 Hz


CU AL CU CU

0.107 0.116

0.099 0.109

0.093 0.106

0.088 0.100

0.084 0.096

0.081 0.091

0.081 0.116 0.116 0.088

0.078 0.111 0.111 0.086

0.075 0.104 0.104 0.0820.074 0.100 0.100 0.079

0.072 0.095 0.095 0.077

0.071 0.092 0.092 0.076

0.072 0.089 0.089 0.076

0.072 0.087 0.087 0.076

0.071 0.085 0.085 0.075

0.071 0.082 0.082 0.075

0.070 0.079 0.079 0.075


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0.070 0.073 0.073 0.075

0.070 0.068 0.068 0.074

0.097 0.092 0.092 0.075

0.094 0.089 0.089 0.075

0.093 0.087 0.087 0.075

0.091 0.086 0.086 0.075

0.090 0.085 0.085 0.0740.088 0.082 0.082 0.074

0.087 0.079 0.079 0.074

0.086 0.073 0.073 0.074

0.084 0.068 0.068 0.073


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7271024 motor feeder cable voltage drop

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