PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
DESIGN BRIEF REPORT
PROJECT NAME: PROPOSED HIGH COURT BUILDING AT
AMARAVATHI
LOCATION : AMARAVATHI
FOR ELECTRICAL WORKS
(DATED. 01/02/2018 – REV: R0)
TEAM ONE INDIA PVT., LTD.
#5th Floor, Anvi’s ECO Grand, Sy.No.135 & 136, Near Wipro Lake, Nanakramguda, Serilingampalli, Ranga Reddy
District – 500008 .
Hyderabad -34. Ph: +91-40-64510101.
E-mail: info@team01.in
Team One India Pvt., Ltd. Page 1 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
INDEX
Sl. No. CONTENTS
1.0 INTRODUCTION
2.0 DESIGN STANDARD AND ASSUMPTION
3.0 HT POWER DISTRIBUTION SYSTEM
4.0 DESIEL GENERATOR SYSTEM
5.0 LT POWER DISTRIBUTION
6.0 EARTHING
7.0 LIGHTING
8.0 UPS
REVISION/VERIFICATION HISTORY:
REVISION
DATE PREPARED BY CHECKED BY
NUMBER
SOWJANY
R0 01.02.2018 V.S
A
Team One India Pvt., Ltd. Page 2 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
1. INTRODUCTION
Office Block Area statement:
The work comprises of electrical installation for the Infrastructure for
Electrical distribution system associated with the proposed High court
building –at Amaravathi.
The total super building area , Split up areas are mentioned below.
Total Site Area : 4 Acres
Built up area : 334023 Sqft
The Project Comprises : Office Building as per
NBC2016
Height of the building : 26 m
No. Of Floors : G+4
Team One India Pvt., Ltd. Page 3 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
PROPOSED HIGH COURT AT AMARAVATI
ANDHRA PRADESH
BUILDING - G + 4
DESCRIPTION FLOOR HEIGHT IN METERS AREA IN SFT
Ground Floor 6.00 66804
1st Floor 5.00 66804
2nd Floor 5.00 66804
3rd Floor 5.00 66804
4th Floor 5.00 66804
Total Build up area in Sft 334023
Total Building Height in Meters 26
Main Grid Power Supply is envisaged at 33kV.
33kV HT Power Distribution by Ring main loops.
The transformer and DG sizing is made considering the office and
utility loads.
33kV/415V outdoor Distribution Transformer, outdoor, oil type, with
ON-Load Tap Changer (OLTC) with range of +5 to -15% @ 2.5%
steps
Change over from EB to DG & Vice versa through Electrical &
Mechanical wired interlock.
Downstream Distributions to Main LT Switchboards / Sub-
Distribution Boards at 415V, 3Phase, 4 Wire System.
During normal conditions all Transformers shall be charged feeding
loads independently.
Internal Power distribution for floors through Rising Mains at 415V, 4
Team One India Pvt., Ltd. Page 4 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
Wire System..
Lighting design with Energy efficient management system.
Power factor correction is considered only for current phase of
interiors.
Building Management System (BMS) is considered only for current
phase of interiors.
2. DESIGN STANDARDS AND ASSUMPTIONS
2.1 Design Assumptions
Light Pollution Density for all the areas including office are
considered as per latest ECBC norms.
LED Energy efficient lamps are considered
Considered as per green building guidelines
For 33kV supply, Andra Pradesh Electricity Board will
Power supply
provide Dedicated feeder to this facility as per APSEB
connection from EB
Norms.
authority
HT Metering to the HT tariff meter : For Office load including the utility
developer loads
Generator back-up 100% backup for complete office and utility loads
Team One India Pvt., Ltd. Page 5 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
Method of DG
Automatic
source changeover
Transformer
Located at Outdoor – 2 Nos of 2500KVA to be considered.
location
LT DG Sets located Outdoor with acoustic enclosure. –2
DG yard / room no.s of 2000 kVA & 2 nos.of 1250 kVA DG sets are
considered
Inverter 5% of emergency lighting to be proposed on over all load.
UPS UPS to be proposed for all systems
2.2 Design Standards
The design shall be based on the following Standards and Guidelines
a) Indian Standard Specifications
b) Andrapradesh Electricity Board Supply Authority Rules and
Regulations
c) National Building Code of India
d) Other Statutory Regulations.
3.HT Power distribution systems:
From
APSEB
33KV HT cable
33 KV RMU
33KV HT cable
Team One India Pvt., Ltd. Page 6 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
METERING CUBICLE
33KV HT cable
33KV HT PANEL
33KV HT cable
33KV /415 V 2 No.s of 2500 kVA Oil type Distribution transformer to be
considered.
Equipment Configuration:
1. TRANSFORMERS (2 no.s of 2500 k)
33KV/415V 2 No.of 2500 kVA Oil type Distribution transformer to be
considered.
Load Estimate:
Area
in sft Lighting(1.25w/sft) Power(3.5w/sft) AC(10w/sft Total Load
6680
Ground floor 4 83505 233814 668040 985359
6680
First floor 4 83505 233814 668040 985359
6680
Second floor 4 83505 233814 668040 985359
6680
Third floor 4 83505 233814 668040 985359
6680
Fourth floor 4 83505 233814 668040 985359
417528.75 1169080.5 3340230 4926839.25
Team One India Pvt., Ltd. Page 7 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
Detailed Transformer Load calculation:
PROJECT :PROPOSED HIGH COURT AT AMARAVATHI
: ELECTRICAL TRANSFORMER LOAD
TITLE
CALCULATIONS
TOTAL
LOAD IN
S.No. DESCRIPTION DIVERSIT LOAD
KW
Y FACTOR IN KW
1 LIGHTING LOAD 417.5288 0.8 334.023
2 POWER LOAD 1169.081 0.8 935.2644
3 AC LOAD 3340.23 0.8 2672.184
4 PUMPS LOAD 70 0.5 35
5 FIRE FIGHTING LOAD 50 0.5 25
5 LIFT LOAD (4 no.s) 60 1 60
6 EXTERNAL & LANDSCAPING LIGHTING 20 0.5 10
7 MISCELLANEOUS LOAD 15 0.6 9
TOTAL LOAD IN KW 4080.5
TOTAL LOAD IN KVA WITH 0.95 PF 4295.2
Team One India Pvt., Ltd. Page 8 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
SELECTED TRANSFORMER WITH 90% LOADING 4772.48117
PROPOSED TRANSFORMER RATING 2x2500
4.DIESEL GENERATOR SYSTEM
LT DG SETS
Diesel generators shall be provided comprising 100% standby
power. Synchronisation control system will be provided for automatic
start, auto-load sharing, synchronizing & Load dependent start & stop
operations are performed during EB mains failure condition.
Generator operation would be functioned through synch panel.
2 no.s of 2000 kVA & 2 no.of 1250 kVA DG sets are considered.
Detailed Generator Load calculation:
:PROPOSED HIGH COURT AT
PROJECT
AMARAVATHI
: ELECTRICAL GENERATOR LOAD
TITLE
CALCULATIONS
LOAD IN DIVERSITY TOTAL LOAD
S.No. DESCRIPTION
KW FACTOR IN KW
1 LIGHTING LOAD 417.529 0.8 334.023
2 POWER LOAD 1169.08 0.8 935.2644
3 AC LOAD 3340.23 0.8 2672.184
4 PUMPS LOAD 70 0.5 35
5 FIRE FIGHTING LOAD 50 0.5 25
5 LIFT LOAD (4 no.s) 60 1 60
6 EXTERNAL & LANDSCAPING LIGHTING 20 0.5 10
7 MISCELLANEOUS LOAD 15 0.6 9
TOTAL LOAD IN KW 4080.5
TOTAL LOAD IN KVA WITH 0.8 PF 5100.6
Team One India Pvt., Ltd. Page 9 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
SELECTED GENERATOR WITH 80% LOADING 6375.736563
PROPOSED GENERATOR RATING
2x2000+2x1250
5.LT POWER DISTRIBUTION:
Main LT panel shall be located in Utility building (Ground floor). This
shall be in a cubicle, compartmentalized, air insulated, indoor type
with draw out type ACBs & fixed type MCCBs. The bus bars rated
above 100A shall be of electrolytic grade aluminium. The lower
ratings shall be with copper cables.
Bus bars shall be designed for a current density of 0.8Amps/sq.mm
for Aluminium bus bars and current density of 1.2Amps/sq.mm for
copper bus bars.
A continuous earth bus of Aluminium bus shall be provided.
The entire system shall be fuse less.
Metering shall be with electronic digital type which is capable of
displaying all electrical parameters and shall have communication
capability.
Over current, short circuit and earth fault protections shall be
provided for all incoming circuits in the main panel & sub panels.
The main switch board shall have requisite number of feeders
including one spare feeder of each rating.
Separate outgoing feeders shall be provided for AC systems, fire
pump, external lighting, rising mains, utility loads and spares.
All Panels inside the building shall have top entry & outdoor panels
shall have bottom entry.
Main panels, Sub panels shall be form 3B construction and both
side extendable type.
A. VOLTAGE DROPS
Team One India Pvt., Ltd. Page 10 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
The maximum voltage drops in various sections of the electrical
system shall be within the limits stated in the table below.
MAX.
Sl.No SYSTEM ELEMENT
PERMISSIBLE
.
Maximum voltage Drop(Vd) allowed from
1 ≤ 12V
Main PCC to Individual Panel
% voltage Drop(%) allowed from Main PCC
2 ≤ 3%
to Individual panel
Total % cumulative voltage drop (%) is
3 allowed from Main PCC panel to upto the ≤ 5%
Equipment
Distribution Scheme:
Main LT panel,Power factor control panel,Utility panels are situated
at Main Electrical room .
Adequate numbers of XLPE Al.Cables are run from Main LT panel to
Floor distribution panel located in each floor Ground floor electrical
room .
Rising mains to be proposed from main panels to electrical shafts
for further floors distribution.
Tap the power from rising mains tap off box to floor panels.
Further Distribution from DB to individual Lighting, Power, UPS &
Emergency.
Team One India Pvt., Ltd. Page 11 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
Distribution from Main LT panel up to chillers, primary & secondary
pumps kept at the Ground floor level will be through XLPE Al.
cables .
Inverter is to be considered for Emergency lighting.
Metering Concept
Main 33 kV HT metering for the whole building loads will happen at
the 33 kV metering yard.
LT meters will be provided at the following feeders.
Main LT Panel Incomers for Grid Power and DG Power.
Dual (DG and Grid Power) Meters for AC feeders in Main LT panel.
Dual (DG and Grid Power) Meters for Utility and common area
load feeders in Main LT panel.
Dual (DG and Grid Power) Meters for Raw Power Rising Main
feeders in Main LT panel.
Dual (DG and Grid Power) Meters at rising main floor tap offs for
Tenants.
The following loads shall be metered by separate energy meters.
Exterior lighting power consumption.
UPS Power consumption.
HVAC Pumps power consumption.
AHUs / FCUs power consumption.
Ventilation fans power consumption.
All utilities like compressor, Lifts, Pumps, WTP, STP, Etc (all different
utility systems available in the Project) shall be metered separately.
All meters shall be with Port Provision (RS 485) for data logging.
Team One India Pvt., Ltd. Page 12 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
SAFETY FEATURES
For all lighting and small power panels 30mA sensitivity earth
leakage circuit breakers will be installed for protection against
electrocution.
Live parts of all equipments in panels and Distribution boards shall
be shrouded.
HT cable to transformer shall be properly protected using MS pipe or
suitable size cable tray duly clamped.
Cables shall be protected with sand cushioning and moulded bricks.
Cable trays shall be galvanized – weld less and ready to install.-
prefabricated.
Copper strips laid for neutral shall be laid in heat shrinkable PVC
sleeves.
Route markers shall be provided for HT cables.
RCCBs – wherever provided shall be suitable for isolation, with
distinguished trip and off indications.
RCCBs shall be of Si type with 30 mA
MCBs used for Lighting and small power shall be Curve C – 10 kA.
MCBs used for UPS distribution shall be of Curve D – 10 Ka
ELECTRICAL ROOM
Team One India Pvt., Ltd. Page 13 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
6.0 EARTHING (GROUNDING)
IS – 3043 – code of Practice Earthing.
Earthing system with separate neutral & ground wires running all
along the installation shall be adopted.
Hot dip galvanized iron will be used for safety earthing.
Adequate number of earth electrodes meeting statutory
requirements will be provided.
The system will be designed to limit the earth impedance as per
standards, so as to ensure positive operation of the current
operated safety devices.
Special soil treatment shall be adopted if the resistivity exceeds
100ohm. Meters.
Chemical earthing shall be considered for rocky areas.
Grounding and earthing for the individual equipments / systems in
the floor plate shall be by occupant.
Space Provision for the end user’s Dedicated Equipment earthing as
per Industrial standard with sleeves & tray provision to reach
electrical shaft.
Internal office earthing for UPS / computer / any other special
equipments is not envisaged.
EQUIPMENT BODY EARTHING EQUIPMENT NEUTRAL
EARTHING
Team One India Pvt., Ltd. Page 14 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
7.0 LIGHTING
Interior lighting Control
Within these buildings, Office areas enclosed by walls, Partitions,
rooms , meeting & conference rooms, and storage spaces shall be
provided with Occupancy sensors that turn off lights within 30
minutes of Occupant leaving the space. However Interior Lighting
intended for 24 hrs operations, required for safety, security of
building occupants are not required to have these controls.
For continuous improvement of Projects energy performance, it is
suggested to have separate Lighting DB , Power DB,UPS DB &
Emergency DB along with separate meters from the main board
itself.
Illumination levels for all the below mentioned areas shall be as per
NEC.
Street and area lighting for buildings will be supplied and installed
to provide visual guidance and security lighting. LED ‘s with
appropriate luminaries will be installed on poles.
Pathway & Landscape lighting for buildings will be supplied and
installed to provide Architectural features with LED lamps with
appropriate luminaries will be installed.
Team One India Pvt., Ltd. Page 15 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
Lighting for Office Area’s, common areas and toilets will be with
surface / recess mounted LED light fixtures / Decorative light
fixtures.
Lighting has been designed for the whole building with LEDs.
Lighting Lux levels at certain areas are mentioned in DBR as per
NBC 2016 code.
For Projects energy savings, interior lighting shall be designed with
50% LPD reduction (As we reduce the lighting load in the building,
HVAC load also gets reduced significantly).
Please find below the baseline LPD value & recommended
LPD value as per Green Building guideline:
Max. Allowable Recommended
Space Name LPD (W/ft²) LPD (W/ft²)
30% reduction
Office 1.10 0.77
Entrance Lobby / 1.30 0.91
Meeting / conference
Reception 1.20 0.84
Corridor / lobby 0.50 0.35
Stairways 0.60 0.42
Electrical & Mechanical 1.50 1.05
Rooms
Toilet 0.90 0.63
Exterior lighting Control
Exterior Lighting designed for dusk to dawn operation shall be
controlled by an astronomical switch or Photo sensor or daylight
sensor. Lighting not designated for dusk-to-dawn operation shall be
controlled by either.
Team One India Pvt., Ltd. Page 16 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
1. A Combination of Daylight sensor / Photo sensor and time
switch or
2. An Astronomical switch.
However exterior lighting for covered vehicle entrances or exits
from buildings or parking structures where required for safety,
security, or eye adaptation are not required to have these controls.
a. Light Pollution Reduction
The total upward light ratio of the exterior lighting shall be limited to
5%. Lighting levels shall be limited to 0.2 horizontal & vertical foot
candles at site boundary and 0.01 foot candles at 15ft beyond the
site boundary.
b. Lighting Power densities
Exterior lighting power densities for the project shall not exceed the
base line values as show in the table.
Exterior Lighting Power Densities
ASHRAE Recommend Recommended
Area Baseline ed LPD (30% LPD (50%
reduction) reduction)
Building Main 30W/ft of 21 W/ft of 15W/ft of door
Entries & exits door door width width
width
Walkways less 1W/linear 0.7W/linear ft 0.5W/linear ft
than 10ft wide ft
Walkways greater
than 10ft wide, 0.2W /ft² 0.14W /ft² 0.1W /ft²
landscape, facade
Parking Lots &
driveways 0.15W 0.10W /ft² 0.075W /ft²
/ft²
Exit Signs
Team One India Pvt., Ltd. Page 17 of 18
PROJECT NAME: PROPOSED HIGH COURT AT AMARAVATHI
Rev : R0
ELECTRICAL DESIGN REPORT
Exit signs shall not exceed 5W per face. Exit signs with built in back
up power supplies (Batteries) with service life of 10 years shall be
installed.
External lighting shall be done as per the standard design.The
power distribution shall be done through armoured cables & an
outdoor feeder pillar / external lighting DB shall be provided with
24Hrs timer for automatic switching on/off the lights during night &
day time and with provision for Manual on/off, through an
Auto/Manual selector switch and Push Buttons.
Lighting scheme will be designed to suit landscape layout. Building
lighting will be done using LED light fixtures. Cabling for all the light
fixtures will be executed using multi-core PVC armoured cable.
As per National Building Code (NBC) of India, required illumination
level for various areas are as mentioned below:
Sl No. Location Recommended lumens in
Lux.
1 Driveway 100-150 lux
2 Parking 50-100 lux
3 Lift landings 150-200 lux
4 Common area & lobby 200-250 lux
5 Corridors 50-100 lux
6 External Lighting 15- 20 lux
7 Workstations 300-500 lux
8.0 UPS SYSTEM
Office Space Floors for G+4: Space allocation is made for housing
UPS system to feed desktop & Server loads.
Team One India Pvt., Ltd. Page 18 of 18
