Upcoming SlideShare
×

# Lighting nilanka

871 views

Published on

Published in: Education
0 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
• Be the first to comment

• Be the first to like this

Views
Total views
871
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
76
0
Likes
0
Embeds 0
No embeds

No notes for slide

### Lighting nilanka

1. 1. Lightning & Load Estimation <br />
2. 2. Content……<br /><ul><li>Introduction
3. 3. Calculate the no of luminaries
4. 4. Distribution of luminaries
5. 5. Design no of socket outlets required
7. 7. Transformer selection
8. 8. Draw a single line diagram
9. 9. Cable selection
10. 10. BOQ</li></li></ul><li>Introduction<br />
11. 11. Cont….<br /><ul><li>Luminous Flux
12. 12. It is about total light emitted.
13. 13. Luminous Intensity(I)
14. 14. Measure the light intensity of a light source in a given direction
15. 15. Illuminance
16. 16. the luminous flux (lumens) falling on a surface per unit area normal to the surface.
17. 17. Luminance
18. 18. It is about visual brightness</li></li></ul><li>Calculate no of luminaries<br />N = (E x L x W)<br /> (NL x  x MF x UL x LLd)<br />E = Required Illuminance (Lux level) <br />L = Room Length (m)<br />W = Room Width (m) <br />NL = Number of lamps in each Luminaire<br />N = Number of Luminaires<br /> = Lamp flux<br />M = Maintenance Factor<br />UF = Utilisation Factor<br />LLD = Lamp Lumen Deterioration Factor<br />
19. 19. Required Illuminance (Lux level)<br />Place to place change the required Lux level<br />Depend on type of working situation<br />So we can summarized the lux level <br />
20. 20. Recommended Lighting Levels <br />
21. 21. Number of lamps in each Luminaire<br />
22. 22. Lamp flux<br />
23. 23. Utilisation Factor<br /><ul><li>The amount of light reaching a point depends on the direct contribution from the luminaries and on the indirect contribution reflected from the room surfaces.
24. 24. So we have to consider that indirect contribution also.
25. 25. The figure indicates the reflectance of the</li></ul>1.Ceiling 2. Walls 3. FloorWorking plane.<br />731 corresponds to a reflectance 0.7 for the ceiling, 0.3 for the walls and 0.1 for the working plane.<br />
26. 26. Cont….<br /><ul><li>Room Index</li></ul>R.I = (LXW)/ [(H1-H0)X(L+W)]<br />Where,<br />L = Room Length (m)<br />W = Room Width (m)<br />H1= Height of luminaries' light emitting surface<br />H0 = Height of the working plan<br />
27. 27. Cont….<br />
28. 28. Maintenance Factor<br /><ul><li>The Maintenance Factor is defined as the ratio of</li></ul>Average illuminance on the working plane after a specified period of use of a lighting installation to the average illuminance obtained under the same conditions for a new installation. <br /><ul><li>It is always less than 1. </li></li></ul><li>Lamp Lumen Deterioration Factors For Commonly Used Lamp Types <br />
29. 29. Distribution of luminaries<br />
30. 30. Design no of socket outlets required<br /><ul><li>No of socket outlets varies place to place in a building. we should have a better knowledge about that.
31. 31. It depend user requirement
32. 32. Shop
33. 33. House
34. 34. Office
35. 35. Factory
36. 36. We use 5A,13A,15A sockets.</li></li></ul><li>Load Estimation<br />10*(1+(2-1)*0.2)<br />36*12/0.7/230<br />18*10/0.7/230<br />
37. 37. Transformer selection<br />We have different size transformers<br /><ul><li>30 kVA
38. 38. 50 kVA
39. 39. 1000kVA
40. 40. 1600 kVA</li></li></ul><li>Draw a single line diagram<br />
41. 41. Cable selection<br /><ul><li>We can select cable size for the design load. we can get cable size using catalog.
42. 42. We have to check that cable is suitable.
43. 43. Selected cable must be acceptable.</li></li></ul><li>BOQ(Body of Quantity)<br />