Lt Cable Sizing Design as Per15% Drop)

8/10/2019 Lt Cable Sizing Design as Per15% Drop)

1/284

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

2 of 284


2/284


INPUT DATA

Feeder Load kW

Voltage rating kV


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.


=

=

=


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 =


=

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


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))

3 of 284


3/284


Drop at the time of Starting

With in the Permissible limit of 15% voltage drop hence ok


INPUT DATA

Feeder Load kW

Voltage rating kV




Allowable Voltage Drop at Normal running Cond. %



Calculation




=

=

=

Total factor to be applied for arriving the capacity =


= A


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


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



2.03 455x1x0.65

300 1.0

0.8

455 A



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

4 of 284


4/284


Where,

(Assumed)







INPUT DATA

Feeder Load kW

Voltage rating kV




Allowable Voltage Drop at Normal running cond. %



Calculation



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

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


3.03

(Fuse Operated)

165

5 of 284


5/284



=

=

=



= A


Voltage drop

Where,

(Assumed)








Temperature 35C

%100 = 14.16

3.01

2.02Current Rating at 35CCable size

2.03 292x2x0.65

292 A



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 =


270

2402.36

x

0.6

= 33.968 V

1.0

3.03

=33.968

2

Vdrop =

990



x x

Vdrop

%Vdrop

(Fuse Operated)

x 270

6 of 284


6/284


INPUT DATA

Feeder Load kW

Voltage rating kV







Calculation




=

=

=



= A


Voltage drop

Where,

(Assumed)


With in the Permissible limit of 2.5% voltage drop hence okShort Time rating of the Cable


= 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

=



137 A

P

=

3.01


0.65

2.03

380

3.00

292x2x0.65

3 x IFLVdrop =

n

cos =

VT = 0.415

=

x 305



V

Vdrop

=

x

= 0.6sin

L

15=

1.08

x

Factor for grouping of cables

PMCC TO Conveyor 12 - Stream 2 Feed conveyor

7 of 284


7/284





INPUT DATA

Feeder Load kW

Voltage rating kV






Calculation


Size of 185 Sq.mm 4 core Aluminium cable is selected for checking.


=

=

=



= A


Voltage drop

=


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


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



3 x V




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

8 of 284


8/284


Where,

(Assumed)



INPUT DATAFeeder Load kW

Voltage rating kV





Calculation




=

==



= A


Voltage drop

Where,

(Assumed)

0.44


= 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


Temperature 35C

IFL = =

117 A


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)

9 of 284


9/284




INPUT DATA

Feeder Load kW

Voltage rating kV







Calculation




=

=

=


Current carrying capacity of 16 sq.mm,1 Run Cable =

= A


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



16 1.0 70 A




0.65

2.03 70x1x0.65

46

3.00

3.01

IFL

Vdrop =

n


1.07 = 15

(Fuse Operated)

10 of 284


10/284


Where,

(Assumed)







INPUT DATA

Feeder Load kW

Voltage rating kV







Calculation



%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))



3.02

15

= 0.54 V

=

3.03

%Vdrop =

(Fuse Operated)


0.54x 100 = 0.23

x

11 of 284


11/284



=

=

=



= A


Voltage drop

Where,

(Assumed)







0.03x 100 =0.06

=

Vdrop

%240

2.02Cable size



16 1.0 70 A




0.65

2.03 70x1x0.65

46

3.00

3.01

IFL

Vdrop =

n


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




=16

= 2.71

=

0.36

12

1

V

x 15x ((0.00244 x 0.8) + (0.0000808 x 0.6))

Vdrop

%Vdrop =

=

0.36


x 100 = 0.15 %240

3.03

KA/0.2Sec13.2xt 13.2*.2

(Fuse Operated)

12 of 284


12/284


INPUT DATA

Feeder Load kW

Voltage rating kV






Calculation


Size of Sq.mm 3.5core Aluminium cable is selected for checking.


=

=

=

Total factor to be applied for arriving the capacity =Current carrying capacity of 16 sq.mm,1 Run Cable =

= A


Voltage drop

Where,

(Assumed)




0.30.13

P

VT

5.6 / 0.8

%

=


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


Temperature 35C

=


10 A

0.95x3 x 0.415


3.00

3.01


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 =



= 15

13 of 284


13/284





INPUT DATA

Feeder Load kW

Voltage rating kV







Calculation




=

=

=



= A

P

R


Cable sizeRating factor for Ambient

Temperature 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


46


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

=

=


3.03

Vdrop

%Vdrop

1.07 = 15


(Fuse Operated)

14 of 284


14/284



Voltage drop

Where,

(Assumed)







INPUT DATA

Feeder Load kW

Voltage rating kV







0.3 %240

x

0.72x 100 =

0.12


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


%Vdrop =

x

x x 15

24

Vdrop =

1

0.72

((0.00244 x 0.8) + (0.0000808 x 0.6))

VVdrop

%Vdrop =

=


3.03


Iw (Fuse Operated)

15 of 284


15/284


Calculation




=

=

=



= A


Voltage drop

Where,

(Assumed)






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

=


20 A

0.95x3 x 0.415



46

3.00


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



=

15

120

Vdrop =

1

Vdrop

%Vdrop


((0.00244 x 0.8) + (0.0000808 x 0.6))

V

=

16 of 284


16/284



INPUT DATA

Feeder Load kW

Voltage rating kV







Calculation




=

=

=



= A


Voltage drop

Where,

(Assumed)



0.86

= 7

Reduction Factor

P

0.95x3 x 0.415

4 / 0.8

16 1.0 179 A

13.2*.22.71

16=


KA/0.2SecIw =s

=13.2xt

x 15

3.00

2.03 179x1x0.65

116

2.00

2.01


2.02Cable size


Temperature 35C

2.44

X

AIFL = =

3 x V x

3.01

15

0.0808

= 2.5


=

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)

17 of 284


17/284







INPUT DATA

Feeder Load kW

Voltage rating kV







Calculation




0.53100 =

=

=

%240

1.26x

P

=

Primary Crusher Product Apron Feeder (VFD)

A

55

55 / 0.8

= 101

0.95x3 x 0.415


42

70 1.0 179 A

2.02Cable size



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


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

=

=


3.03

Vdrop

%Vdrop

= 0.65

(Fuse Operated)

x 15

18 of 284


18/284


=

=

=



= A


Voltage drop

Where,

(Assumed)



For VFD = A




INPUT DATA

Feeder Load kW

Voltage rating kVLength of the cable m



%= 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


=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




x

x 50


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

19 of 284


19/284





Calculation


Size of Sq.mm 3.5core Aluminium cable is selected for checking.


=

=

=



= A


Voltage drop

Where,

(Assumed)






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


0.65

46

0.065


0.021

0.021

V

0.06 %240

x

0.04 / 0.9

0.86

IFL

1.0

0.95x3 x 0.415

=


Temperature 35C

16

3.00



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


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

20 of 284


20/284




INPUT DATA

Feeder Load kW

Voltage rating kV







Calculation




=

=

=



= A


Voltage drop

Where,

(Assumed)


= 2.7113.2*.2

Reduction Factor



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


16 1.0


46

1.04 R = 2.44

1.06 = 2.5

2.01

=

3 x V x IFL =

2.02Cable size


Temperature 35C

3.7 / 0.8

3 x 0.415


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

21 of 284


21/284



DOL or Squirrel Cage = ADrop at the time of Starting



INPUT DATA

Feeder Load kW

Voltage rating kV







Calculation




=

=

=

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



35 1.0


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



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

=

=


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)

22 of 284


22/284




= A


Voltage drop

Where,

(Assumed)







INPUT DATA

Feeder Load kW

Voltage rating kV




Allowable Voltage Drop at normal running cond. %

4.63 %240

11.108x 100 =

1.851x 100 = 0.78 %

240


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



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 =


3.03

(Fuse Operated)

23 of 284


23/284




Calculation




=

=

=Total factor to be applied for arriving the capacity =


= A


Voltage drop

Where,(Assumed)






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


A

0.95x3 x 0.415

5.5 / 0.8

IFL =

2.02Cable size




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



= 15

1.08 =

=

1

x 60

0.65

24 of 284


24/284



INPUT DATA

Feeder Load kW

Voltage rating kV







Calculation




=

=

=



= A


Voltage drop

Where,

(Assumed)


2.71

2.02


=

3 x V x

Cable size Rating factor for AmbientTemperature 35C


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 =



16 1.0 70 A



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

25 of 284


25/284







INPUT DATA

Feeder Load kW

Voltage rating kV







Calculation


Size of 16 Sq.mm 4core Aluminium cable is selected for checking.


=

=

=


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


=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



16 1.0 70 A




0.65

= 0.65



=

= 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))


3.03

%Vdrop =14.403

x 6.01 %

= 15

(Fuse Operated)

x 60

26 of 284


26/284



= A


Voltage drop

Where,

(Assumed)







INPUT DATA

Feeder Load kW

Voltage rating kV



Reactance of the cable at 50Hz / kmAllowable Voltage Drop at normal running cond. %



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


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



KA/0.2Sec

13.2xt 13.2*.2

1

Vdrop =

7.922


=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


(Fuse Operated)

27 of 284


27/284


Calculation




=

=

=



= A


Voltage drop

Where,

(Assumed)






%240

1.32x 100


7.922

1.0

x (R cos+ X sin)

= 0.55

70 A


%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



0.86

2.03 70x1x0.65

46



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))


((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 =


%Vdrop = x 100 = 3.31

28 of 284


28/284



INPUT DATA

Feeder Load kW

Voltage rating kV






Current derating factorsCalculation




=

=

=



= A


Voltage drop

Where,

(Assumed)


P

=

3 x V x

Iw =s

KA/0.2Sec13.2xt 13.2*.2


=16


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



25 1.0 96 A




0.65

2.03 96x1x0.65

62

3.00

3.01

IFL

Vdrop =

n


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

29 of 284


29/284







INPUT DATA

Feeder Load kW

Voltage rating kV







Calculation




=

=

=



= 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



KA/0.2Sec13.2xt 13.2*.2

1

Vdrop =

%Vdrop


=25


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






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


30 of 284


30/284



Voltage drop

Where,(Assumed)







INPUT DATA

Feeder Load kW

Voltage rating kV







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


=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))



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 =


3.03

1.08 = 0.65

(Fuse Operated)

31 of 284


31/284


Calculation




=

=

=



= A


Voltage drop

Where,

(Assumed)






0.8 %240

11.523x 100 = 4.81 %

240

1.92

x 100 =

Cable sizeRating factor for Ambient


16 1.0 70 A

0.9

2.02

2.00

0.86



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


1

Vdrop =

11.523 V

120

x ((0.00244 x 0.8) + (0.0000808 x 0.6))

=

=

=Vdrop

%Vdrop

x 48

32 of 284


32/284



INPUT DATA

Feeder Load kW

Voltage rating kV





Allowable Voltage Drop at Starting Condition %Current derating factors

Calculation




=

=

=



= A


Voltage drop

Where,

(Assumed)


=

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


Temperature 35C Current Rating at 35C

16 1.0 70 A


3.00

3.01


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


=16

= 2.71


3.03

= 0.65

46

0.65

70x1x0.65

(Fuse Operated)

15

33 of 284


33/284



DOL or Squirrel Cage = ADrop at the time of Starting



INPUT DATA

Feeder Load kW

Voltage rating kV







Calculation




=

=

=


0.42x 100 =


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


Reduction Factor

= 45

VT

15

= 2.5

0.9

Vdrop =

%Vdrop

13.2*.2Iw =

13.2xt

= 6.001 V

1.00

0.0718

=


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


Temperature 35C


0.65

Conveyor 4 - Stokpile feed conveyor with t ripper car

60

x ((0.00244 x 0.8) + (0.0000808 x 0.6)) x



1

Vdrop =

Vdrop

%Vdrop =


3.03

(Fuse Operated)

0.65

50

34 of 284


34/284



= A


Voltage drop

Where,

(Assumed)







INPUT DATA

Feeder Load kW

Voltage rating kV







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


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



1

3.03

= 3.7

15

0.65

(Fuse Operated)

x

35 of 284


35/284


Calculation




=

=

=


Current carrying capacity of 16 sq.mm1 Run Cable == A


Voltage drop

Where,

(Assumed)






%240

21.845x 100 = 9.11 %

240

x 100 = 1.52

3.641 V

x

2.00

2.01

IFL =

P

2.02Cable size


Temperature 35C

0.8

70 A


Reduction Factor

2.03 70x1x0.65

3.00

3.01

46

Vdrop

sin

cos

=

n

IFL

=

7Vdrop =

1

Vdrop

0.86


=

3 x V x

=

=

0.6

16 1.0

0.9


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



3.641

%Vdrop

21.845

((0.00244 x 0.8) + (0.0000808 x 0.6))

=

=Vdrop


36 of 284


36/284



INPUT DATA

Feeder Load kW

Voltage rating kV






Current derating factorsCalculation




=

=

=



= A


Voltage drop

Where,

(Assumed)


2.7113.2*.2


KA/0.2SecIw =s

=13.2xt

16=

46

0.65

2.03 70x1x0.65

Reduction Factor

2.02Cable size


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


3 x V x 0.95x3 x 0.415


16 1.0 70 A

IFL

0.9


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)

37 of 284


37/284







INPUT DATA

Feeder Load kW

Voltage rating kV







Calculation




=

=

=


0.07 %240

0.96x 100 = 0.4 %

240

0.16x 100 =%Vdrop =

3.02

Iw =s

24

Vdrop

V

x=

Vdrop = 0.96


=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



16 1.0 70 A




0.65

1.07 = 15

1.08 = 0.65


1


((0.00244 x 0.8) + (0.0000808 x 0.6))


3.03

%Vdrop =

x 20

(Fuse Operated)

38 of 284


38/284



= A


Voltage drop

Where,

(Assumed)







INPUT DATA

Feeder Load kVA

Voltage rating kV






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


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 =

=


=16

= 2.71Iw =s

KA/0.2Sec13.2xt 13.2*.2

3.02 Check for Starting Current


((0.00244 x 0.8) + (0.0000808 x 0.6))

1

Vdrop =

18

3.03

V

%Vdrop =

Vdrop =

(Fuse Operated)


1.8

x 50x

39 of 284


39/284


Calculation




=

=

=


current carrying capacity of 300sq.mm,2Run cable == A


Voltage drop

Where,

(Assumed)



INPUT DATA

Feeder Load KVA

Voltage rating kV





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



100

= = 139

300 1.0 455 A




0.65

2.03 455x2x0.65592

3.00

3.01

IFLVdrop =

n


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)

40 of 284


40/284


Calculation


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


Voltage drop

Where,

(Assumed)



INPUT DATA

Feeder Load KVA

Voltage rating kVLength of the cable m



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)


0.65

2.03 814x6x0.65




630 1.0 814 A

2.02Cable size


Temperature 35C

= 2667 A

3 x V 3 x 0.433

2000

IFL = =

2.00

2.01

P

41 of 284


41/284




Calculation


Size of 300 Sq.mm 3.5 core Aluminium cable is selected for checking.

(Ref : KEI INDUSTRIES LIMITED CATALOG PG.NO. 79)

=

==



= A


Voltage drop

Where,

(Assumed)



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


Temperature 35C

300 1.0 455 A

3 x 0.433A


1000

= = 1333




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)

42 of 284


42/284


INPUT DATA

Feeder Load kW

Voltage rating kV





Calculation




=

=

=



= A


Voltage drop

Where,

(Assumed)




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



95 1.0 221 A




0.65

2.03 221x1x0.65

144

3.00

3.01

IFL

Vdrop =

n


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

42 of 284


43/284


INPUT DATA

Feeder Load kW

Voltage rating kV





Calculation




=

=

=


Current carrying capacity of 120 sq.mm1 Run Cable == A


Voltage drop

Where,

(Assumed)



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



120 1.0 257 A




0.65

2.03257x1x0.65

167

3.00

3.01

IFL

Vdrop =

n


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


=120

= 20.3 KA/0.2Sec13.2xt 13.2*.2

Iw = (Fuse Operated)

43 of 284


44/284


INPUT DATA

Feeder Load kW

Voltage rating kV



Reactance of the cable at 50Hz / kmAllowable Voltage Drop %

Calculation




=

=

=



= A


Voltage drop

Where,

(Assumed)



x


%240


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



95 1.0 221 A


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


=95

= 16.1 KA/0.2Sec13.2xt 13.2*.2

Iw =

44 of 284


45/284


INPUT DATA

Feeder Load kW

Voltage rating kV




Calculation




=

=

=



= ACheck for vo ltage drop

Voltage drop

Where,

(Assumed)



%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


Temperature 35C Current Rating at 35C

120 1.0 257 A




0.65

2.03 257x1x0.65

1673.00

3.01

IFL

Vdrop =

n


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)


=120

45 of 284


46/284


INPUT DATA

Feeder Load kW

Voltage rating kV



Reactance of the cable at 50Hz / kmAllowable Voltage Drop at normal running cond. %



Calculation




=

=

=



= ACheck for vo ltage drop

Voltage drop

Where,

(Assumed)



For VFD = A

Drop at the time of Startin

Documents

Lt Cable Sizing Design as Per15% Drop)