motor feeder cable voltage drop

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PROJECT: VSP BF-3 DOCUMENT NO REV DATE

E 08/04/2023

LT CABLE SIZING CALCULATION

DESIGNED CHECKED SHEET

TITLE: ACH MMR A4

15.00 kw SOURCE: MCC-WT APPROX. LENGTH 210 m

Parameter Basis / Formula Used Value Unit Symbol

Motor rating / Total Load 15 15 Kw Mr ###

Demand Factor Assumed 1 F

Consumed 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 % 3.68

Check for voltage drop

Allowable voltage drop (%) starting 15 % %Vdsa

Allowable voltage drop (%) running 4.40 % %Vdra

Allowable voltage drop at starting Vs x %Vdsa/100 61.876 Volt Vdsa

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

Max. Conductor Resistance at 70 degC (refer cable catalogue) 1.442 Ohm / km R

Reactance at 50 c/s (refer cable catalogue) 0.097 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 0.675 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 Hydraulic System- Filling Pump

Running cos f (consumed load) cos fr

Running sin f sin fr

Starting cos f cos fs

Starting sin f sin fs

hr

Mc / (cos fr x hr)

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

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

HR PVC

LT XLPE

HT XLPE

EPR CSP

No. of cables / tray

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

of 12

PROJECT: VSP BF-3 DOCUMENT NO REV DATE

E 08/04/2023

LT CABLE SIZING CALCULATION

DESIGNED CHECKED SHEET

TITLE: ACH MMR A4

B) In above calculation, Consumed Load have been considered as Motor rating.C) The above cable size selected for motor is based on Average length of 150 Mtr, However, the final cable sizes for individual motors shall be based on the actual cable lengths considering the voltage drop.

GN-ST-06(Design Sheet)

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

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

STANDARD MOTOR RATINGS FLPF 3/4THPF FLEFF 3/4THEFF1 0.18 0.65 0.58 0.5 0.462 0.22 0.6 0.55 0.58 0.533 0.37 0.64 0.58 0.65 0.584 0.55 0.7 0.64 0.72 0.675 0.75 0.7 0.65 0.74 0.696 1.1 0.76 0.7 0.75 0.77 1.5 0.79 0.72 0.77 0.728 2.2 0.82 0.76 0.8 0.759 3.7 0.83 0.78 0.82 0.81

10 5.5 0.84 0.79 0.85 0.8311 7.5 0.85 0.81 0.87 0.8712 9.3 0.85 0.81 0.88 0.8813 11 0.85 0.82 0.89 0.8914 15 0.86 0.83 0.9 0.915 18.5 0.86 0.84 0.91 0.9116 22 0.87 0.84 0.91 0.9117 30 0.89 0.86 0.92 0.9218 37 0.9 0.89 0.925 0.92519 45 0.9 0.89 0.93 0.9320 55 0.86 0.82 0.935 0.93521 75 0.89 0.88 0.94 0.9422 90 0.9 0.86 0.945 0.94523 110 0.9 0.86 0.945 0.94524 132 0.9 0.86 0.948 0.94825 160 0.9 0.86 0.953 0.95326 180 0.9 0.86 0.953 0.95327 200 0.9 0.86 0.955 0.95528 225 0.87 0.82 0.948 0.9429 250 0.87 0.82 0.945 0.935

SYSTEM VOLTAGE1 2402 4153 11004 33005 66006 110007 33000

1 2 3 4 5 6CABLE DATA

CURRENT RATING AT 40 DEG (LAID IN TUNNEL)

X-SECTION PVC HRPVC LT XLPE

AL CU AL CU AL1 3cx1.5 14 17 16 212 3cx2.5 18 24 22 293 3cx4 23 30 28 37 314 3cx6 30 39 37 48 505 3cx10 39 57 49 63 676 3cx16 50 65 62 81 707 3cx25 63 66 85 110 968 3cx35 77 110 105 134 1179 3cx50 95 135 128 165 142

10 3cx70 130 155 159 201 17911 3cx95 155 200 189 244 22112 3cx120 180 230 220 281 25713 3cx150 205 255 250 323 29214 3cx185 240 305 293 372 33715 3cx225 255 335 323 407 37916 3cx240 280 355 342 433 39917 3cx300 315 400 384 488 45518 3cx400 375 455 458 555 53019 3cx500 425 521 519 635 61220 3cx630 480 674 586 759 70721 1cx120 220 280 268 342 26822 1cx150 250 320 305 390 30923 1cx185 290 370 354 451 36024 1cx225 315 400 390 483 40825 1cx240 335 425 409 519 43326 1cx300 380 475 464 580 50127 1cx400 435 550 531 671 59628 1CX500 480 590 586 720 69329 1cx630 550 660 671 805 814

current ratingCABLE TYPE AL CU

1 PVC 63 662 HRPVC 85 1103 LT XLPE 96 1084 HT XLPE 100 1155 EPR CSP 0 113.98

CONDUCTOR current1 AL 632 CU 66


CONDUCTOR RESISTANCE AT 70 DEG


AL CU AL CU AL1 3cx1.5 21.747 14.480 21.720 12.200 23.1702 3cx2.5 14.538 8.870 14.520 7.560 15.5003 3cx4 8.903 5.520 8.890 4.700 9.4804 3cx6 5.539 3.685 5.530 3.110 5.9005 3cx10 3.701 2.190 3.700 1.840 3.9406 3cx16 2.295 1.376 2.290 1.160 2.4407 3cx25 1.442 0.870 1.440 0.734 1.5408 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 0.56711 3cx95 0.384 0.231 0.385 0.195 0.41012 3cx120 0.304 0.183 0.304 0.154 0.32413 3cx150 0.248 0.148 0.248 0.126 0.26414 3cx185 0.197 0.119 0.198 0.100 0.21015 3cx240 0.150 0.090 0.152 0.076 0.16016 3cx300 0.120 0.072 0.122 0.061 0.12817 3cx400 0.094 0.056 0.096 0.048 0.10018 3cx500 0.073 0.044 0.076 0.037 0.07719 3cx630 0.056 0.034 0.061 0.029 0.06020 1cx120 0.304 0.154 0.32421 1cx150 0.248 0.126 0.26422 1cx185 0.198 0.100 0.21023 1cx225 0.171 0.850 0.18024 1cx240 0.152 0.076 0.16025 1cx300 0.122 0.061 0.12826 1cx400 0.096 0.048 0.10027 1CX500 0.076 0.037 0.07728 1cx630 0.061 0.029 0.060


CONDUCTOR REACTANCE AT 50 Hz


AL CU AL CU AL1 3cx1.5 0.126 0.119 0.092 0.109 0.1072 3cx2.5 0.119 0.115 0.087 0.105 0.0993 3cx4 0.116 0.112 0.081 0.101 0.0934 3cx6 0.110 0.104 0.073 0.095 0.0885 3cx10 0.100 0.099 0.064 0.089 0.0846 3cx16 0.097 0.090 0.055 0.086 0.0817 3cx25 0.097 0.088 0.054 0.084 0.0818 3cx35 0.097 0.086 0.050 0.082 0.0789 3cx50 0.094 0.086 0.050 0.079 0.075

10 3cx70 0.090 0.083 0.046 0.076 0.07411 3cx95 0.090 0.083 0.043 0.076 0.072

12 3cx120 0.087 0.082 0.042 0.074 0.07113 3cx150 0.087 0.082 0.042 0.074 0.07214 3cx185 0.087 0.082 0.042 0.074 0.07215 3cx240 0.087 0.079 0.041 0.073 0.07116 3cx300 0.086 0.079 0.040 0.073 0.07117 3cx400 0.086 0.079 0.040 0.073 0.07018 3cx500 0.079 0.079 0.040 0.073 0.07019 3cx630 - - 0.040 0.725 0.07020 1cx120 0.087 0.074 0.080 0.074 0.09721 1cx150 0.086 0.074 0.082 0.074 0.09422 1cx185 0.085 0.074 0.079 0.074 0.09323 1cx225 0.084 0.074 0.077 0.074 0.09124 1cx240 0.083 0.073 0.075 0.073 0.09025 1cx300 0.083 0.073 0.072 0.073 0.08826 1cx400 0.082 0.073 0.070 0.073 0.08727 1CX500 0.081 0.073 0.069 0.073 0.08628 1cx630 0.081 0.725 0.067 0.725 0.084

resistanceCABLE TYPE AL CU

1 PVC 1.442 0.872 HRPVC 1.44 0.7343 LT XLPE 1.54 0.934 HT XLPE 1.54 0.935 EPR CSP 0 0.795

CONDUCTOR res.1 AL 1.4422 CU 0.87

reactanceCABLE TYPE AL CU

1 PVC 0.097 0.0882 HRPVC 0.054 0.08423 LT XLPE 0.0805 0.08054 HT XLPE 0.116 0.1165 EPR CSP 0 0.088

CONDUCTOR reac.1 AL 0.0972 CU 0.088

NO. OF RUNS1 12 23 34 45 5

6 67 78 89 9

10 1011 1112 1213 1314 1415 1516 1617 1718 1819 1920 20

1 MCC-MUDGUN 0.79 0.00792 MCC-BF-BLT 0.59 0.00593 MCC-GC 0.82 0.00824 MCC-HS 0.65 0.00655 MCC-TRT 1.35 0.01356 MCC-PCI-1 0.88 0.00887 MCC-PCI-2 0.95 0.00958 MCC-PCI-COM 1.17 0.01179 MCC-FF 1.62 0.0162

10 MCC-CHILLER 1.65 0.016511 MCC-SGPN 0.88 0.008812 MCC-SGP-COM1 0.76 0.007613 MCC-SGP-COM2 0.76 0.007614 MCC-SGPS 0.66 0.006615 MCC-CH-DED 0.64 0.006416 MCC-WS1 0.55 0.005517 MCC-WS2 0.74 0.007418 MCC-WT 0.6 0.00619 MCC-SH-1 0.42 0.004220 MCC-SH-2 0.36 0.003621 MCC-SH-COM 0.76 0.007622 MCC-SH-DED 0.59 0.005923 EME-MCC-BF 0.58 0.005824 EME-MCC-PH 0.54 0.0054

7 8 9 10

CURRENT RATING AT 40 DEG (LAID IN TUNNEL)

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

CU AL CU CU

2636 3547 4662 6479 85

108 100 115 114132 121 140 140162 145 175 175198 181 215 216240 221 255 260276 254 290 303318 290 335 349366 330 370 398402 369 415 372426 390 440 348480 450 505 325546 525 600 304612 609 714 284685 706 850 265336 277 368 299384 318 422 343444 370 490 391479 412 547 366510 440 580 342570 509 665 320660 600 805 299708 700 900 279825 817 1030 261

7 8 9 10

CONDUCTOR RESISTANCE AT 70 DEG


CU AL CU CU15.5009.480 8.2105.900 5.0903.940 3.3902.340 1.9501.470 1.2400.930 1.540 0.930 0.7950.671 1.110 0.671 0.5650.495 0.820 0.495 0.3930.343 0.567 0.343 0.2770.247 0.410 0.247 0.2100.196 0.324 0.196 0.1640.159 0.264 0.159 0.1320.127 0.210 0.127 0.1080.096 0.160 0.096 0.0820.077 0.130 0.077 0.0650.060 0.100 0.060 0.0400.047 0.077 0.047 0.0390.036 0.060 0.036 0.0310.196 0.324 0.196 0.1640.159 0.264 0.159 0.1320.127 0.210 0.127 0.1080.107 0.180 0.110 0.0930.096 0.160 0.096 0.0820.077 0.130 0.077 0.0650.060 0.100 0.060 0.0400.047 0.077 0.047 0.0390.036 0.060 0.036 0.031

7 8 9 10

CONDUCTOR REACTANCE AT 50 Hz


CU AL CU CU0.107 0.1160.099 0.1090.093 0.1060.088 0.1000.084 0.0960.081 0.0910.081 0.116 0.116 0.0880.078 0.111 0.111 0.0860.075 0.104 0.104 0.0820.074 0.100 0.100 0.0790.072 0.095 0.095 0.077

0.071 0.092 0.092 0.0760.072 0.089 0.089 0.0760.072 0.087 0.087 0.0760.071 0.085 0.085 0.0750.071 0.082 0.082 0.0750.070 0.079 0.079 0.0750.070 0.073 0.073 0.0750.070 0.068 0.068 0.0740.097 0.092 0.092 0.0750.094 0.089 0.089 0.0750.093 0.087 0.087 0.0750.091 0.086 0.086 0.0750.090 0.085 0.085 0.0740.088 0.082 0.082 0.0740.087 0.079 0.079 0.0740.086 0.073 0.073 0.0740.084 0.068 0.068 0.073

motor feeder cable voltage drop

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