Formula.xlsx

Auto Calculated

KVA

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VOLT

IMP

3800

3040

6600

6.00%

5.54

63.33

332.42

48000

38400

11000

6.00%

41.99

800.00

2,519.42

2000

1600

415

6.00%

46.37

33.33

2,782.49

2500

2000

11000

6.00%

2.19

41.67

131.22

2500

2000

11000

7.00%

1.87

35.71

131.22

7621

6096.8

11000

#DIV/0!

#DIV/0!

400.01

#DIV/0!

#DIV/0!

#DIV/0!

#DIV/0!

#DIV/0!

#DIV/0!

3.28

37.50

164.02

1500

6600

4.00%

Isc KA Fault MVA I Amp

1- Total Isc value shall be sum of T1 + T2+ T3+ T…. K K K

1.5 1.1 0.9

400V 525V 690V

Isk Rated current/UKx100 Rated current rated power 3500 58.33333 Isc = Ir/Usc% Isc Ir Usc

Short circuit current Rated current Impendence

Widly accepted thumb Rule to find out transformer full load amp = KVA x 1.4 It is based on with P.F 1.0, 400V. KVA 630 2500 1000

Full Load Full Load 3Ph Amp 1Ph Amp 882 3500 1400

1512 6000 2400

o.8

,8

Transformer Size

Cable Transformer rating

630kVA transformers

2 no x 1C x 630 Sq mm, Al, XLPE Cable

400kVA transformers

1 no x 1C x 630 Sq mm, Al, XLPE

250kVA transformers

3 ½ C x 400 Sq mm, Al, XLPE

50 to 750

160kVA transformers

3 ½ C x 300 Sq mm, Al, XLPE

800 to 3,200

100kVA transformers

3 ½ C x 150 Sq mm, Al, XLPE

3.402

3402 428.5282909091

http://jhdq-zj.com/index-en.html

(kVA)

Tyoical Impedence in % Oil-immersed Cast-resin dry type 4

6

6

6

Continous Current-Carrying of copper conductor (DIN 43671/4370) Sizing

Ambient Temp 35C conductor Temp 65C conductor width vertical Clearance between conductor equal to conductor thickness Continuous Current in A a.c. up to 60Hz ACB Cross Section Weight ACB Main Busbar Interconnection Painted no of conductors

mm

mm2

kg/m

Kg/Rf

I

II

15x3 30x3 25x5 25x3 20x3 20x2 15x2 12x2

45 90 125 75 60 40 30 24

0.40 0.80 1.12 0.67 0.54 0.36 0.27 0.22

1.31 2.62 3.67 2.20 1.77 1.18 0.89 0.72

190 350 390 300 245 205 155 125

330 600 670 515 425 350 270 225

12 x 5 12 x 10 20 x 5 20 x 10 30 x 5 30 x 10 40 x 5 40 x 10 50 x 5 50 x 10 60 x 5 60 x 10 80 x 5 80 x 10 100 x 5 100 x 10 120 x 10 160 x 10 200 x 10

59.5 119.5 99.1 199 149 299 199 399 249 499 299 599 399 799 499 988 1200 1600 2000

0.53 1.06 0.88 1.77 1.33 2.66 1.77 3.55 2.22 4.44 2.66 5.33 3.55 7.11 4.44 8.89 10.70 14.20 17.80

1.74 3.49 2.89 5.81 4.36 8.73 5.81 11.65 7.28 14.57 8.73 17.49 11.65 23.33 14.57 29.17 35.10 46.59 58.40

203 326 319 497 447 676 573 850 679 1020 826 1180 1070 1500 1300 1810 2110 2700 3290

345 605 560 924 760 1200 952 1470 1140 1720 1330 1960 1680 2410 2010 2850 3280 4130 4970

III

411 879 728 1320 944 1670 1140 2000 1330 2320 1510 2610 1830 3170 2150 3720 4270 5360 6430

II-II

Rating

Amp

Amp

1600 1200 2000 1000 2500 4000 3200 6000

2(60x10) 2(60x5) 2(80x10) 2(50x5) 2(100x10) 3(120x10) 3(100x10) 4(120x10)

3(80x5) 2(60x5) 2(80x10) 2(50x5) 3(80x10) 3(120x10) 3(100x10) 4(120x10)

Component Copper Size

Cable Size

Amp

2580 2010 2950 2310 3290 2830 3930 3300 4530 5130 6320 7490

1-10 15-20 25-32 35-40 50-63 65-80 85-105 110-150 155-175 180-200 225-250 300 400 500 630

mm

mmSq.

15x3 15x3 15x3 15x3 15x3 15x3 15x3 15x3 15x3 20x5 20x5 25x5 30x5 40x5 50x5

1 1.5 2.5 4 6 10 16 25 35 50 70 95 NA NA NA NA NA