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77

7.1 1.

2.

3. ,

,

4. ,

5. , ,

6.

(Main Distribution Board ; MDB)

(Sub Distribution

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Board ; SDB) (Load Panel) (Feeder Shaft)

7.

(

) 8.

9.

(Circuit Breaker ; CB )

10. ,, AT AF Pole (CB)

11. (Main Circuit Breaker)

12. (MDB)

13. Riser Diagram SingleLine Diagram MDB

14. , , ,

15. 16. ()

()

17.

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18.

,

7.2

,, (.) (.)

7.2.1

7.2.2

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(Shop Drawing)

7.2.3

7.2.4 (...)

,

7.2.5 (

...)

7.2.6 - National Electrical Code (NEC) USA

...

- National Electrical Manufacturer Association Standard (NEMA) USA , ,

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- Underwriters Laboratories (UL) USA

UL

- IES Lighting Handbook Illuminating Engineering Society (IES) USA

- 2545

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7.3

1) (Safety)

2) (Reliability)

3) (Flexibility)

4) (Economy) , ,

5) (Voltage Drop)

NEC 3% 5%

7.4 (Load Estimating)

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2

- (Lighting Load) - (Power Load)

, ,

2 -

-

()

,

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7.5 VA (-)

3 S = VI (VA).P = VI cos (W) Q = VI sin (VAR)

3

P V I= c o s

V I= s i n

S V I=

1 V=220V

= cosVIP

3 V=380V= cosVI3P

(W) (PF;cos)

=

cos

P

VI 1

=

cos.3

P

VI 3

PF PF = 1

7.5.1

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VA

PF=1

7.1 (A) (VA)

40W 0.182 40

60W 0.273 60

75W 0.341 75

100W 0.455 100

150W 0.682 150

Gas Discharge Power Factor

7.2 POWER CONSUMPTION

LOW POWER FACTOR HIGH POWER FACTOR (A) (VA) (A) (VA)

20 (18) 0.370 81.40 (100) 0.160 35.20 (50)40 (36) 0.430 94.60 (100) 0.270 59.40 (60)

32 0.410 90.20 (100) 0.240 52.80 (60)

9 0.190 41.80 (50) 0.100 22.00 (30)SL 13 0.175 38.50 (50) 0.100 22.00 (30)

18 0.220 48.40 (50) 0.140 30.80 (40)

25 0.315 69.30 (50) 0.180 39.60 (50)

5 0.180 39.60 (50) 0.070 15.40 (20)PL (TC-S) 7 0.175 38.50 (50) 0.070 15.40 (20)

9 0.170 37.40 (50) 0.070 15.40 (20)

11 0.155 34.10 (50) 0.080 17.60 (20)

TC-D 10 0.190 41.80 (50) 0.100 22.00 (30)

13 0.175 38.50 (50) 0.100 22.00 (30)

18 0.220 48.40 (50) 0.140 30.80 (40)

25 0.315 69.30 (70) 0.180 39.60 (50)

HIGH PRESSURE

MERCURY

50 0.620 136.40 (150) 0.300 66.00 (70)

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80 0.800 176.00 (200) 0.450 99.00 (100)

125 1.150 253.00 (300) 0.700 154.00 (160)

250 2.150 473.00 (500) 1.400 308.00 (310)

400 3.250 715.00 (750) 2.150 473.00 (500)

700 5.450 1199.00(1200) 3.800 836.00 (850)

1000 7.500 1650.00(1700) 5.300 1166.0(1200)

HIGH PRESSURE SODIUM 35 0.540 118.80 (120) 0.220 48.40 (50)

50 0.780 171.60 (180) 0.300 66.00 (70)

70 1.000 220.00 (220) 0.580 127.60 (150)

100 1.200 264.00 (270) 0.600 132.00 (150)

150 1.800 396.00 (400) 1.100 242.00 (250)

250 3.000 660.00 (660) 1.400 308.00 (310)

400 4.600 1012.00(1100) 2.200 464.00 (500)

600 6.200 1384.00(1400) 3.000 660.00 (660)

1000 10.200 2244.00(2300) 5.450 1199.0 (1200)

HIGH PRESSURE METAL

HALIDE

35 0.540 118.8 (120) 0.220 48.40 (50)

70 1.000 220.00 (220) 0.580 127.60 (130)

150 1.800 396.00 (400) 0.800 176.00 (200)

250 3.000 660.00 (660) 1.400 308.00 (320)

400 3.500 770.00 (800) 2.200 464.00 (500)

1000 9.500 2090.00(2100) 5.350 1177.0 (1200)

2000 10.300 2266.00(2300) 6.150 1353.0 (1400)

3500 18.000 3960.00(4000) 10.600 2332.0 (2400)

***

2545 2.5 (sq.mm.)

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- 125%

7.3

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- (CB) 80%

7.4 Circuit Breaker

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- 40%

7.5

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36W LOWPOWER FACTOR 10 ( THW EMT)

(CB) 36W 1

()= 100 VA. 36W 10

10x100 VA = 1000 VA.

1000

220

= 4.545 A.

- 4.545x1.25 = 5.68 A. THW 2.5 sqmm. (18A)

- 2 7.5 1/2

- 18x0.8 = 14.4 A 10AT / 50AF (

400W LOWPOWER FACTOR 6 ( THW EMT) (CB)

400W LOW POWER FACTOR 1 ()= 800 VA.

400W LOW POWER FACTOR 6 6x800 VA = 4800 VA.

4800

220

= 21.82 A.

- 21.82x1.25 = 27.275 A. THW 6 sqmm. (31A)

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- 2 7.5 1/2

- 31x0.8 = 24.8 A 25AT / 50AF (

7.5.2 Line Neutral

2.5 sqmm. 1.5 sqmm. (Ground)

(Outlet) 7.6

7.6

(W)

(VA)

6000 6000 4000 5000

1200 2000

1500 2000 1000 2000 400 2000 600 2000

(W)

(VA)

1500 2000 5000 6000

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5000 6000

(W)

(VA)

400 1000 1500 2000 600 2000 8000 10000 400 2000

1 220V. THW EMT

7.6 2000VA

=2000

9.1

220

A

- 125%9.1x1.25 = 11.375A

THW 2.5 sqmm.(18A)

- 7.5 1/2

- 80%18x0.8 = 14.4A

CB = 15AT

3500 W. 220V. 1 THW EMT

() 3500VA

=3500

15.9 .

220

A

- 125%

15.9x1.25 = 19.875A.

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THW 4 sqmm.(24A)

-

7.5

1/2

- 80%24x0.8 = 19.2A

CB = 20AT / 50AF

(Power Outlet)

3A (660 / )

3+3+3 = 9A 9x220 = 1980VA

- 125%9x1.25 = 11.25A

THW 2.5 sqmm.(18A)-

7.5 1/2- 80%

18x0.8 = 14.4A

CB = 15AT

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(Receptacle)-

- - 12 (3.60)- 3 - 0.30

180VA / CB 10AT 10

CB 15AT 15

CB 20AT 20

(RECEPTACLE) 15 VAF

15x180VA. = 2700VA.

270012.27 .

220

A=

- 125%12.27x1.25 = 15.3375A

VAF 2.5 sqmm.(20A)

- 80%20x0.8 = 16A

CB = 15AT

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- 7.7

7.8-

7.9

7.7 .

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7.8 3

7.9

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-

125% 7.7 7.8-

7.5-

80%

7.9

200%-

7.9 7.7 7.8-

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7.5-

80%

(THW) , (EMT) (CB) 15HP , 380V , 3P

7.8 = 25A

- 125%25x1.25 = 31.25A

THW 10 sq.mm.(43A)- 3 10sq.mm. 4

7.5 1- 80%

43x0.8 = 34.4A

CB = 35AT (THW) , (EMT)

(CB) 15HP , 380V , 3P 15 / 7.8 = 25A

- 85% ( 7.9)25x0.85 = 21.25A

THW 4 sq.mm.(24A)- 3 4 sq.mm. 4

7.5 3/4- 80%

24x0.8 = 19.2A

CB = 20AT

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2

125%

125%

(THW) , (EMT) (CB)

- 125%

(1.25x10)+7+5 = 24.5A

THW 6 sq.mm.(31A)

- 3 THW 6 sq.mm.( 4 ) 7.5 3/4

- 80%31x0.8 = 24.8A

CB = 25AT

-

( 7.9 ) (125%) 7.10

- 7.5

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- 80%

7.10

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(THW) , (EMT) (CB) (Spilt Type) 40 ton48,000BTU , 400V , 3P

7.10 = 70.43 KVA. = 70,430 VA.

=70430

176.075 .

400

A=

- 125%176.075x1.25 = 220.1A

THW 150 sq.mm.(251A.)- 3 THW 4x150 sq.mm.

7.5 3- 80%

251x0.8 = 200.8A

CB = 200AT / 225AF

BTU/H

BTU/H

7.11

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() x (650 800) = (BTU/H)

7.10

20 30

= 600 x 650 = 390000 BTU/H

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7.12

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7.6 (Load Schedule)

1. (Spare) , CB , CB (Space) CB , CB

(Active Branch Circuit)

(Spare Branch Circuit)

(Space Branch Circuit)

(Active Branch Circuit) 60% - 80%

(Spare Branch Circuit) 10% - 20% (Space Branch Circuit) 10% - 20%

2.- (Rated Load)- (Receptacle) 1 (220VA) - (Spare) - 42

2 3. 3

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7.7 CB

1. 2. CB

- = 125% x - CB = 80%x 2

1 : 1

VA

I

V

= 1

A ,=4200VA

I

4200

220= = 19.09 A

- = 125% x = 1.25x19.09 = 23.86A

THW 4 sqmm.(24A) THW 6 sqmm.(31A) ()

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- CB = 80%x= 0.8x31 = 24.8A

CB 25AT / 100AF , 3P

2 : 3

IVA

3xV= 3

A ,=12,300VA

I

12,300

3x380= = 18.68 A

- = 125% x = 1.25x18.68 = 23.35A

THW 4 sqmm.(24A) THW 6 sqmm.(31A) ()

- CB = 80%x= 0.8x31 = 24.8A

CB 25AT / 100AF , 3P

3.

(Demand factor)

30 ,

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(Demand factor) (...) (VA) (%)

2,000 100

() 2,000 35 * 50,000 40 50,000 20

20,000 50 20,001 100,000 40

100,000 30 100*

10KVA

3KVA

3KVA

10KVA

1P 220V

2

= += 3KVA + 3KVA

= 6KVA

(Demand factor) 32,000 VA 100% = 2,000 VA 2,000 VA 35% = 4,000x0.35 = 1,400 VA= 3,400 VA

= 10,000+10,000+3,400 = 23,400VA

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1 : 1

IVA

V= 1

=23,400VA23,400

I

220

= = 106.36 A

- = 125% x = 1.25x106.36 = 132.95A

THW 70 sqmm.(148A)

- THW 2x70 sq.mm.

1-1/2

- CB = 80%x= 0.8x148 = 118.40A

CB 125AT / 225AF , 2Pole

7.8 MDB ,

CB (MDB) CB MDB CB Main CB MDB MDB MDB

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MDB 9

Main CB CB

- = 125% x - CB = 80% x

1 3

MDB Main CB

1. 1 A = 58,900VA

IVA

V= 1

I

58,900

220= = 267.72 A

- = 125% x = 1.25x267.72 = 334.65A

THW 240 sq.mm.(344A) 4

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- THW 4x240 sq.mm. 3-1/2

-

CB = 80%x

= 0.8x344 = 275.20A

CB 300AT / 400AF , 3Pole

MDB

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KVA

A

THW ()

TWA ()

30 43.3 4x16 4x35

50 72.2 4x35 4x50

100 144.3 4x70 8x35 4x95 8x50

160 230.9 4x120 8x50 4x185 8x70

200 288.7 4x150 8x70 4x185 8x95250 360.8 4x185 8x95 12x50 4x240 8x120 12x70

315 454.7 4x240 8x120 12x70 4x400 8x185 12x95

400 577.3 4x400 8x150 12x95 4x500 8x185 12x120

500 721.7 4x500 8x185 12x120 8x240 12x185

630 909.3 8x240 12x150 16x120 8x400 12x185 16x185

800 1154.7 8x400 12x240 16x185 8x500 12x300 16x240

1000 1443.4 8x500 12x300 16x240 12x400 16x30

()

MDB

MDB = 175,500VA = 175KVA- 200KVA ()- THW 4x150 sqmm. ()

,

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100A

1P,2W,220V (A) 3 (9) 5 16 6 10 4

5 (15) 5-10 16 6 10 4

10 (30) , 15 (45) 10-20 16 10 16 10

15 (45) , 20 (40) 20-30 25 10 25 10

30 (60) , 30 (100) 30-50 35 35 35 35

30 (100) , 50(100) 50-100 50 50 50 35

3P,4W,380V (A) 10 (30) , 15 (45) 10-20 16 10 16 10

15 (45) , 20 (40) 20-30 25 10 25 10

30 (60) , 30 (100) 30-50 35 35 35 3530 (100) , 50(100) 50-100 50 50 50 35

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1. 36W 30 ( THW EMT) (CB)

2. 10 ( THW EMT) (CB)

3. 30 ( VAF

) (CB)

4. (THW) , (EMT) (CB) 25HP , 380V , 3P 5 /

5. (THW) , (EMT) (CB) 3P,380V 25HP , 10HP , 15HP

6. (THW) , (EMT) (CB) 20 3 400V.

7. (THW) , (EMT) (CB) 10KVA , 40