Table for Electrical Machine Design

8/12/2019 Table for Electrical Machine Design

1/29

Ordinary covering (nun)

0.250 0.5000.280 0.530

0.315 0.565

0.355 . 0.6050.400 0.650

0.450 0.700

0.500 0.750

0.560 0.810

0.630 0.880

0.710 0.985

0.750 1.025

0.800 1.075

0.850 1.125

0.900 1.175

0.950 1.2251.000 1.275

1.060 1.335

1.120 1.395

1.180 1.455

1.250 1.525

1.320 1.595

1.400 1.700

1.500 1.800

1.600 1.900

1.700 2.000

1.800 2.1001.900 /2002.000 2.350

2.120 2.470

2.240 2.590

2.360 2.710

2.500 2.850

2.650 3.000

2.800 3.150

3.000 3.350

3.150 3.500

3.350 3.9003.550 3.980

3.750 4.100

4.000 4.350

4.250 4.600

4.500 4.850

4.750 5.100

5.000 5.350

Table 10.1: IS: 3454-1966 giving Diameter of Paper Covered Roun

Conductor diameter (nominal mat)

Overall diame


2/29

Fine covering (nun)

0.4250.455

0.530

0.5300.575

0.625

0.675

0.735

0.805

0.885

0.925

0.975

1.025

1.075

1.1251.200

1.260

1.320

1.380

1.450

1.520

1.575

1.675

1.775

1.875

1.9752.0752.250

2.370

2.490

2.610

2.725

2.875

3.025

3.225

3.375

3.5753.775

3.975

4.300

4.550

4.800

5.050

5.300

Copper conductors

ter Inavanum


3/29

Conductor

diameter

(nominal) Ordinary Fine Ordinary Fine(mm) (mm) (mm) (mm) (mm)

0.224 0.354 0.326 0.481 0.4040.250 0.380 0.352 0.507 0.430

0.280 0.410 0.382 0.537 0.461

0.315 0.445 0.417 0.572 0.496

0.355 0.486 0.458 0.613 0.531

0.400 0.531 0.503 0.658 0.582

0.450 0.582 0.554 0.709 0.6320.500 0.632 0.604 0.759 0.683

0.560 0.696 0.665 0.820 0.744

0.630 0.763 0.736 0.891 0.814

0.710 0.869 0.842 0.997 0.8950.750 0.910 0.882 1.037 0.935

0.800 0.960 0.933 1.087 0.986

0.850 1.011 0.983 1.138 1.036

0.900 1.061 1.034 1.188 1.087

0.950 1.112 1.084 1.239 1.137

1.000 1.162 1.135 1.290 1.215

1.060 1.225 1.195 1.350 1.275

1.120 1.285 1.255 1.410 1.335

1.180 1.345 1.315 1.470 1.375

1.250 1.415 1.385 1.540 1.4651.320 1.485 1.460 1.615 1.535

1.400 1.590 1.565 1.720 1.645

1.500 1.695 1.665 1.820 1.745

1.600 1.795 1.765 1.920 1.845

1.700 1.895 1.865 2.020 1.945

1.800 1.995 1.970 2.125 2.045

1.900 2.095 2.070 2.775 2.150

2.000 2.225 2.195 2.375 2.275

2.120 2.345 2.315 2.495 2.395

2.240 2.465 2.440 2.620 2.5152.360 2.585 2.560 2.740 2.635

2.500 2.730 2.700 2.880 2.780

2.650 2.880 2.850 3.035 2.930

2.680 3.030 3.005 3.185 3.080

3.000 3.235 3.205 3.385 3.285

3.150 3.385 3.355 3.540 3.435

3.350 3.585 3.560 3.740 3.635

Table 10.2: IS:450-1964 Cotton Covered Round Copper Conductors

Overall diameter maximum

Single cotton Double cotton


4/29


5/29

Nominal conductor Normal covering Thick Covering (mm) (mm) (mm)

0.025 0.035 -0.030 0.040 -

0.036 0.045 -

0.040 0.050 -

0.045 0.058 -

0.050 0.063 0.068

0.060 0.073 0.080

0.071 0.086 0.094

0.080 0.095 0.105

0.090 0.108 0.115

0.100 0.118 0.1280.112 0.132 0.142

0.125 0.145 0.155

0.132 0.152 0.162

0.140 0.163 0.173

0.150 0.173 0.186

0.160 0.183 0.196

0.170 0.195 0.218

0.180 0.205 0.228

0.195 0.220 0.236

0.200 0.225 0.2410.312 0.240 0.255

0.224 0.254 0.270

0.236 0.266 0.382

0.250 0.283 0.298

0.258 0.291 0.306

0.265 0.298 0.316

0.280 0.316 0.331

0.300 0.336 0.354

0.307 0.343 0.301

0.315 0.354 0.3720.335 0.374 0.394

0.355 0.397 0.417

0.375 0.417 0.437

0.400 0.445 0.465

0.425 0.473 0.495

0.462 0.513 0.535

0.475 0.526 0.548

Table 10.3: IS: 449-1962 Diameleit of Enamelled Round Copper Wire.

(Oleo Resinous Enamel)

Overall diameter - maximum


6/29

0.500 0.553 0.576

0.530 0.584 0.609

0.560 0.614 0.642

0.600 0.657 0.681

0.630 0.687 0.713

0.670 0.728 0.756

0.710 0.768 -0.730 0.791 -

0.750 0.811 -

0.800 0.861 -

0.850 0.914 -

0.925 0.980 -

0.950 1.015 -

1.000 1.065 -

1.060 1.130 -

1.120 1.195 -

1.180 1.255 -1.250 1.325 -

1.320 1.395 -

1.400 1.440 -

1.500 1.580 -

1.600 1.685 -

1.700 1.785 -

1.800 1.890 -

1.900 1.995 -

2.060 2.160 -

2.120 2.220 -2.240 2.345 -

2.360 2.465 -

2.500 2.610 -

2.650 2.765 -

2.800 2.920 -

2.900 3.020 -

3.000 3.125 -

3.150 3.280 -

3.250 3.385 -

3.350 3.485 -3.450 3.590 -

3.550 3.695 -

3.650 3.795 -


7/29

Fine coveringMedium

coveringThick covering

Extra thick

covering

mm mm mm mm mm

0.050 0.060 0.065 - -0.060 0.073 0.078 - -

0.071 0.081 0.092 - -

0.080 0.095 0.105 0.118 -

0.090 0.105 0.115 0.128 -

0.100 0.118 0.128 0.141 -

0.112 0.132 0.143 0.156 -

0.125 0.146 0.159 0.172 -

0.132 0.155 0.168 0.181 -

0.140 0.163 0.176 0.191 -

0.150 0.173 0.186 0.201 -0.160 0.185 0.198 0.213 -

0.170 0.198 0.211 0.226 -

0.180 0.208 0.223 0.238 -

0.195 0.224 0.239 0.257 -

0.200 0.230 0.246 0.264 -

0.212 0.242 0.258 0.276 -

0.224 0.254 0.272 0.290 -

0.236 0.266 0.284 0.302 -

0.250 0.283 0.301 0.319 0.344

0.258 0.291 0.309 0.327 0.352

0.265 0.299 0.317 0.335 0.362

0.280 0.316 0.334 0.351 0.379

0.300 0.336 0.354 0.372 0.400

0.307 0.345 0.362 0.380 0.408

0.315 0.354 0.372 0.389 0.417

0.335 0.375 0.393 0.410 0.441

0.355 0.397 0.415 0.432 0.465

0.375 0.418 0.438 0.455 0.489

0.400 0.445 0.465 0.488 0.518

0.425 0.472 0.493 0.513 0.549

0.462 0.511 0.531 0.551 0.588

0.475 0.526 0.546 0.566 0.603

0.500 0.551 0.571 0.591 0.630

0.530 0.581 0.602 0.623 0.662

0.560 0.612 0.635 0.655 0.696

0.600 0.654 0.677 0.697 0.738

Nominal

conductor

diameter

Table 10.4: IS: 1595-1960 Roand Copper Wire (Synthetic Enamel)

Overall diameter

Page 7 of 29


8/29

Fine coveringMedium


Extra thick

covering

mm mm mm mm mm

Nominal

conductor

diameter


Overall diameter

0.630 0.684 0.707 0.728 0.7680.670 0.727 0.750 0.771 0.812

0.710 0.768 0.791 0.814 0.852

0.730 0.788 0.811 0.834 0.874

0.750 0.808 0.831 0.854 0.895

0.800 0.861 0.884 0.907 0.950

0.850 0.912 0.935 0.958 1.001

0.925 0.990 1.016 1.039 1.035

0.950 1.015 1.041 1.064 1.110

1.000 1.070 1.095 1.120 1.165

1.060 1.130 1.155 1.180 1.225

1.120 1.190 1.215 1.240 1.287

1.180 1.253 1.278 1.303 1.353

1.250 1.325 1.350 1.375 1.425

1.320 1.395 1.420 1.447 1.500

1.400 1.480 1.505 1.535 1.585

1.500 1.580 1.605 1.635 1.685

1.600 1.680 1.710 1.749 1.790

1.700 1.785 1.810 1.840 1.890

1.800 1.885 1.915 1.940 1.995

1.900 1.990 2.015 2.045 2.095

2.060 2.150 2.180 2.210 2.265

2.120 2.211 2.242 2.271 2.327

2.240 2.335 2.365 2.397 2.455

2.360 2.485 2.488 2.520 2.575

2.500 2.600 2.630 2.665 /.720

2.650 2.752 2.785 2.815 2.872

2.800 2.905 2.935 2.970 3.025

2.900 3.010 3.040 3.070 3.125

3.000 3.110 3.140 3.175 3.230

3.150 3.262 3.295 3.325 3.382

3.250 3.365 3.395 3.427 3.485

3.350 3.465 3.497 3.520 3.585

3.450 3.567 3.600 3.630 3.690

3.550 3.670 3.700 3.732 3.795

3.650 3.770 3.800 3.835 3.895

3.750 3.872 3.902 3.937 3.997

Page 8 of 29


9/29

Fine coveringMedium


Extra thick

covering

mm mm mm mm mm

Nominal

conductor

diameter


Overall diameter

4.000 4.125 4.155 4.190 4.255

Page 9 of 29


10/29

Voltampere (VA) Tunis per volt (Te) Voltampere (VA)

10 23.3 200

15 17.5 250

20 14.0 300

25 11.7 400

50 7.0 500

75 5.6 750

100 4.6 1000

150 4.0

Table 10.5: Number of Turns per Volt-TeCorresponding to Volt


11/29

Tunis per volt (Te)

3.5

2.8

2.5

2.3

2.0

1.7

1.6

mpere Rating-VA.


12/29

Sankey Type Remarks

No. A B C D E

(mm) (mm) (mm) (mm) (mm) (mm)

17 12.70 38.00 31.80 6.35 6.35 12A 16.90 47.80 39.70 7.95 7.95

21 16.90 50.80 54.00 7.95 7.95

10 16.90 60.30 54.00 9.52 9.52

10A 16.90 60.30 54.00 9.52 9.52

1 24.60 64.30 57.20 7.95 7.95

74 17.50 52.40 43.70 8.74 8.74

23 19.10 57.20 47.70 9.52 9.52

11 19.10 76.20 57.20 9.52 9.52

11A 19.10 76.20 66.60 9.52 9.52

2 19.10 76.20 76.20 9.52 9.52

30 20.00 60.00 50.00 10.00 10.00 4 holes 4 mm dia

31 22.20 66.60 55.60 11.10 11.10 4 holes 4 mm dia

45 22.20 66.60 55.60 11.10 11.10 4 holes 4 mm dia

15 25.40 76.20 63.50 12.70 12.70 4 holes 5.55 mm dia

44 25.40 76.20 63.50 12.70 12.70 4 holes 5.55 mm dia14 25.40 84.00 66.60 13.50 13.50 4 holes 5.55 mm dia

4 25.40 97.00 97.00 13.50 13.50 4 holes 5.55 mm dia

33 28.00 84.00 70.00 14.00 14.00 4 holes 4.4 mm dia

3 31.80 95.30 79.50 15.90 15.90 4 holes 5.55 mm dia

13 31.80 101.60 89.00 12.70 12.70 4 holes 5.55 mm dia

4A 33.80 105.00 97.40 16.70 16.70 4 holes 4.75 mm dia

16 38.10 114.30 95.30 19.05 19.05 4 holes 5.55 mm dia

5 38.10 120.70 95.30 19.05 19.05 4 holes 6.75 mm dia

6 38.10 127.00 114.30 19.05 19.05 4 holes 7.15 mm dia

7 50.80 152.50 125.50 25.40 25.40 4 holes 6.75 mm dia

43 50.80 152.50 127.00 25.40 25.40 4 holes 6.75 mm dia

8 50.80 184.00 171.50 25.40 25.40 4 holes 9.55 mm dia

Dimensions

Table 10.6: Dimensions of E-I Stampings:


13/29

Current Ratings Number & Dia of Wire Nominal area

Amp mm sq mm

5 Amp 1 / 1.12 0.96

10 Amp 3 / 0.736 1.29

15 Amp 3 / 0.915 1.9320 Amp 7 / 0.736 2.9

28 Amp 7 / 0.915 4.52

36 Amp 7 / 1.12 6.45

48 Amp 7 / 1.32 9.35

53 Amp 7 / 1.626 14.5

62 Amp 19 / 1.12 19.35

74 Amp 19 / 1.32 25.8

97 Amp 21 / 1.626 38.7

COPPER CONDUCTOR CURRENT RATINGS

This table gives the current rating for single core, twine

core cable with V.I.R., P.V.C., T.R.S.. The ratings are based

on an temperature of 30 degree centrigrade

Minimum size of PVC cable that can be used for motor

winding is 3/0.736 mm


14/29

Current Ratings Number & Dia of Wire Nominal area

Amp mm sq mm

10 Amp 1 / 1.40 1.5

15 Amp 1 / 1.80 2.5

20 Amp 1 / 2.24 427 Amp 1 / 2.80 6

34 Amp 1 / 3.55 10

43 Amp 7 / 1.70 16

59 Amp 7 / 2.24 25

60 Amp 7 / 2.50 35

ALLUMINIUM CONDUCTOR CURRENT RATINGS

This table gives the current rating for single core, twine core cable

with V.I.R., P.V.C., T.R.S.. The ratings are based on an temperature

of 30 degree centrigrade

Minimum size of PVC cable that can be used for motor winding is

1/1.80 mm


15/29

sq mm mm S B S B S B S B S

1.00 1/1.12 COPPER 7 5 13 10 20 14

1.25 3/0.736 COPPER 7 5 12 10 20 14

1.50 1/1.40 ALUMINIUM 7 5 12 10 20 14

2.00 3/0.925 COPPER 5 4 10 8 18 12

2.50 1/1.80 ALUMINIUM 6 5 10 8 18 12

3.00 7/0.736 COPPER 5 4 8 6 12 10

4.00 1/2.24 ALUMINIUM 4 3 7 6 12 10

4.50 7/0.925 COPPER 3 2 6 5 10 8

6.00 1/2.80 ALUMINIUM 3 6 5 10 8

6.75 7/1.12 COPPER 2 5 4 8 710.00 1/3.55 ALUMINIUM 2 5 4 8 7

12.00 7/1.32 COPPER 2 4 3 6 5 8 6

14.00 7/1.626 COPPER 3 2 4 4 7 6

16.00 7/1.70 ALUMINIUM 2 4 3 7 6

18.00 19/1.12 COPPER 4 3 6 5 10

25.00 7/2.24 ALUMINIUM 3 2 5 4 8

30.00 19/1.32 COPPER 3 2 5 4 8

35.00 7/2.50 ALUMINIUM 2 4 3 7

40.00 19/1.626 COPPER 3 3 6

50.00 7/3.00 ALUMINIUM 4 3 650.00 19/1.80 COPPER 2 5

Note: The table shows the maximum capacity of conduit for the simultaneous drawing-in of cables.

1,100 V grade cables. The columns headed `S' apply to runs of conduit which have distance not exce

between draw-in-boxes, and which do not deflect from straight by an angle of more than 15. The c

apply to runs of conduit with deflect from the straight by an angle of more than 15

Maximum capacity of conduits for drawing-in of 1,100 V grade cable

Nominal X-

sectional

area

No & diameter

of wire

Material of

conductor

NUMBER OF CABLE THAT CAN BE ACCOMMODATED IN CO

19 MM 25 MM 31 MM 38 MM 50


16/29

B S B

7 12 8

6 9 7

6 9 7

5 8 6

5 8 6

4 6 54 6 5

63 MM

he Table applies to

eding 4.25 metres

olumns headed B

.

NDUIT OF SIZE

M


17/29

Rs.

1 32 A 500V grade triple pole iron clad switch fuse unit

2 16 A 500V grade triple pole iron clad switch fuse unit

3 16 A, 250V grade double pole iron clad main switch4 4 way 500 V 15 A per way iron clad distribution box

5 Heavy gauge conduit

i) 25.4 mm

ii) 19 mm

6 Flexible conduit

i) 25.4 mm

ii) 19 mm

7 Single core 7/2.24 mm aluminium conductor cable



9 Angle iron frames

i) 46 cm x 60 cm

ii) 30 cm x 50 cm

10 Conduit bends

i) 25.4 mm

ii) 19 mm

11 Conduit saddles

i) 25.4 mm

ii) 19 mm

12 Conduit couplers

i) 25.4 mmii) 19 mm

13 Locknuts

i) 25.4 mm

ii) 19 mm

14 Flexible pipe coupling with locknuts

i) 25.4 mm

ii) 19 mm

15 Wooden Bushings

i) 25.4 mm

ii) 19 mm

16 Teakwood gutties17 Iron screws

18 No 8 SWG GI wire for earthings ( 10 m = 1 Kg )

19 Clips for fixing the earth wire

20 Lugs for connection of the earth wire with motor

21 Earthing set

i) GI pipe (Perforated) 38.1 mm dia

ii) GI pipe 19 mm dia

iii) GI pipe 12.7 mm dia

iv) CI cover 30 cm x 30 cm

Schedule / List of Materials and Costing

RaQty.UnitSpecification of materialsSr. No


18/29

v) GI bends 12.7 mm dia

vi) Funnel with wire mesh cover

vii) GI bolt, nut, and locknut with washers (19 mm)

viii) GI lug

ix) Charcoal

x) Salt

xi) Civil works

22 Caution plate and its painting23 Shock treatment chart

24 Labour cost

Total

Contingencies charges 10 %

Grand total


19/29

No of Phase H.P

M1 3 10.00

Pc. Rs. Pc. M2 3 5.00

1 M3 3 3.00

3 M4 1 1.00

11

1

75

1

6

1.5

1.5

265

1

4

4

35

5

30

220

4

48

2

16

2

24

800300

18

200

10

1

2.75 m

2.45 m

2 m

1 no

Totalte


20/29

3 no

1 no

1 no each

1 no

10 kg

10 kg

21


21/29

Line Voltage Efficiency Power factor HP = watt Line Current Current carrying capacity

VL P.F IL Is = 1.5 x IL

400 80% 0.8 735.5 16.59 24.88

400 80% 0.8 735.5 8.29 12.44

400 80% 0.8 735.5 4.98 7.46

230 80% 0.8 735.5 5.00 7.49

34.85 52.28


22/29


23/29

Al size of Cable Cu size of Cable

1/2.80 mm (27A)

1/1.80 mm (15A)


24/29

Sr. No Specification of material Unit

1 15 A 250V grade IC double Pole Main Switch No

2 8 way 250V, 15 A, per way IC distribution fuse boards No

3. IC cutour 15 A. No.

4. Heavy gauge conduit 19 mm M

5. Single core 1/2.24 mm aluminium conductor cable M

6. Single core 1/l.40 mm aluminium condutor cable M

7. Inspectionboxes (2 way) round 7.6 cm dia with cover for 19 mm conduit No.

8. Junction boxcs 7.6 cm x 7.6 cm with cover No.

9 Outlet boxes 7.6 cm dia for 19 mm conduit No.

10. Conduitbends 19 mm No.

11. Conduit saddles 19 mm No.

12. Conduit couplings 19 mm No.

13. Locknuts 19 mm No.

14. Wooden bushings 19 mm No.

15 Cl boxes with bakelite cover (1) 30 cm x 38 cm No.

16. Ceiling roses 2plate 5 A. No.

17. 5 A t\lmblcr switch-flush type No.

18. Angle iron frame for main board, 30 cm x 50 cm. No.

19. No. 14 SWG copper wire (40 m = 1kg.) kg.

20. Soft screws

(i) 1.90 cm x 8 SWG No.

(ii) 5.08 Cm X 4 SWG No.

21. Labour cost

Total

Contingencies charges 10%

G. Total


25/29


26/29

Sr. No Specification of material Unit

1 30 A. 250 V grade IC double pole main swit


27/29

Qty. reqd Rate Per Total Cost Remarks

1 75.00 each 75.00

1 170.00 each 170.00

1 15.00 cadt 15.00

130 9.00 m 1,170.00

1.0 3.00 100 m 3.00

400 80.00 100 m 320.00

7 1.75 each 26.25

4 3.75 each 15.00

28 3.75 each 105.00

15 2.50 each 37.50

400 0.45 each 180.00

133 0.85 each 115.05

100 2.00 each 200.00

50 6.00 100 nos. 300.00

7 34.00 each 238.00

28 5.00 each 140.00

28 5.50 each 154.40

l 50.00 each 50.00

7 110.00 kg. 770.00

600 30.00 100 nos. 180.00

300 52.00 100 nos. 156.00

855.00

5,275.20

527.50

5,802.70


28/29

Copper G I

Upto 10 hp No 8 No 8

Above 10 hp & upto 15 hp No 8 No 6

Above 15 hp & upto 30 hp No 6 No 2

Above 30 hp & upto 50 hp No 4

Above 50 hp & upto 100 hp No 2 or strip 13 mm x 2.5 mm

Above 100 hp Strip 25 mm x 2.5 mm

Capacity of Apparatus Size of Earth Wire in SWG

RECOMMENDED SIZE OF EARTH WIRE FO


29/29

Copper G I

60 . cm X 60 cm x 3 mm 60 x 60 cm x 6mm

do-- --do

do 90 cm x 90 cm x 6mm

90 cm x 90 cm x 6mm

do

do

Size of Earth Electrode

MOTOR INSTALLATION

Documents

Table for Electrical Machine Design