Electrical Services Appraisal -Group 6

8/12/2019 Electrical Services Appraisal -Group 6

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Building Services - I Electrical Service Appraisal

Table of Contents About the project:.................. ............. ............ .............. ............. ............. ............. ............. .. 2

S.L NO . ............................................................................................................................. 3

Expected maximum demand ............................................................................................. 7

Transformer selection ........................................................................................................ 8

Generator selection ........................................................................................................... 9

Material specifications ....................................................................................................... 9

Observation and Recommendations ............ ............. ............. .............. ............ ............. ... 10

Annexures ............ ............. ............. ............. ............. ............. ............. ............. .............. ...... 11


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About the project:

This housing project, Spire Woods is being developed by Spire World at Sector 103,

Gurgaon. It is located on the upcoming Dwarka - Gurgaon Expressway connecting WestDelhi to Gurgaon. 620 dwelling units are accommodated within 12 Towers (T1-T12) in theComplex,having 3 BHK and 2 BHK units as well as penthouses. The sizes of theapartments vary between 1460 sq.ft. to 2208 sq.ft. In addition to this, there is a ClubBuilding and E.W.S. Accommodation consisting of 110 dwelling units. There is a commondouble basement for car parking (in addition to surface parking) and services.

The Complex also has amenities such as a swimming pool, a gym, a sports complex, a

sports club, a media room, meditation centers, restaurants, etc.


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S.L NO . Particulars Area (in m 2)

1. Total Plot Area

46,538.775

(11.5 acres)

2. Built-Up Area 1,43,664.68

3. Permissible F.A.R. (@ 1.75) 81,442.856

4. Proposed F.A.R. (@ 1.732) 80,629.365

5. Permissible Commercial Area (@ 0.5%) 232.693

6. Proposed Commercial Area 214.875

7. Permissible Ground coverage (@ 35%) 16,288.571

8. Proposed Ground Coverage (@ 17.52%) 8,152.853

9. Basement Area 45,976

10. Stilt Area 803

11. Landscape Area (@ 34.5%) 16,050

12 H i h f ll b ildi 44 975


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Fig 3: Electrical Layout at site level


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Fig 5: Typical Location of Electrical and LV Shafts


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Expected maximum demand

Load perUnit(kW)

TotalNo. ofUnits

TotalLoad

(kW)

DiversityFactor

Expected Max.Demand

Reference

A) APARTMENTS

Tower - T1, T8, T9, T11

T& T12

PENTHOUSE

Tower T2 & T3

PENTHOUSE

Tower T4

PENTHOUSE

Tower T5, T6 & T7

PENTHOUSE

T T10

7

9

9

11

10

12

10

12

260

20

104

8

36

4

156

12

1820

180

936

88

360

48

1560

144

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.6

1092

108

562

53

216

29

936

86

Table : A

Table : B

Table : C

Table : D

Table : E

Table : F

Table : E

Table : F


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C) BASEMENT

Lighting

Ventilation

Drainage pumps

52

235

20

0.7

-

-

36

235

20

Table : J

Table : J

Table : J

D) CLUB BUILDING

750 Sq.m

95 0.7 67 Table : K

E) UTILITIES &EXTERNAL SERVICES

150 0.6 90 Table : L

F) COMMERCIAL 232Sq.Meter

@100W/Sq.m

23 0.7 16

TOTAL 3874

Applying and overall diversity factor of 0.70

The expected max. Demand of the Complex = 3874 x 0.70

= 2712 kW


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Generator selection

Being a prestigious project it is proposed to provide 100% power back up.

Expected maximum demand = 2712 kW

Load requirement in kVA at 0.8 p. f. = 2712 / 0.8 = 3390 kVA

Considering up to 90% loading of rated D.G. set capacity, the required installed capacity ofD.G. sets required = 3390 / 0.90 = 3766O kVA

6 nos. of 600 kVA D.G. sets with weather and sound proof canopies may be selected.These gensets will be radiator cooled and will be installed outdoor with their exhaust pipesgoing above the top the nearest tower.

However, as it is seen normally the standby power demand is less than the grid powerdemand in the residential colonies because of substantial tariff difference. Hence, it isproposed that only 4 nos. 600 KVA gensets shall be provided initially. However, provisionshall be made to add two more sets in future if the need arises.

Material specifications

) f l k l d d l l d d


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Observation and Recommendations

Oil type transformers can be replaced by dry type transformers and placed in the firstbasement so that cabling work is reduced.

HSD tank shall be located near the DG Room instead of the gate so that distance ofpiping work for the same may be provided .

Restricted Access should be provided to the HSD Tank.

The Electrical and LV Shafts may be provided separately instead of single asprovided in case of Tower 10

Acoustic Cover shall be provided to the DG Sets.

Power Back up should be provided to sewerage treatment plant and water treatmentPlant.


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Annexure


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Electrical Services Appraisal -Group 6

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