Volume-IF - JantERmantER

TITLE:
SPECIFIC TECHNICAL
REQUIREMENTS FOR
ELECTRICAL WORKS
SPECIFICATION NO. PE-TS-360-620-C001
VOLUME - II B
SECTION - C SUB SECTION: II
REV.NO. 0 DATE: 18.09.2010
SHEET 2 OF 6
1.00 ELECTRICAL SYSTEM
1.01 415V, normal and emergency AC power supply for chimney shall be derived
from main plant power supply system. Emergency supply shall feed 20% of
platform lighting, 50% of staircase lighting, aviation obstruction lighting and
elevator load. All other loads shall be connected on normal power supply.
1.02 Ambient temperature for design of all equipment shall be considered as 55
deg. C which is likely to be encountered inside the chimney.
1.03 The distribution boards of chimney shall comprise switch-fuse units of
appropriate ratings. Emergency board shall have two incomers, one from
emergency supply and other from normal AC distribution board itself. Autochangeover
scheme shall be provided in emergency board to enable
changeover to healthy source on failure of any source.
1.04 Dry type isolating transformer of Dyn connection shall be provided in
emergency board to obtain neutral lead, in case 3 phase 3 wire emergency
supply is derived from main plant.
1.05 Various platforms shall be illuminated by 70/150W HPSV well glass lighting
fixtures. Staircase lighting shall be with 70W HPSV well glass fixtures.
Average illuminations level of 150 lux shall be maintained on equipment and
50 lux on platforms/staircases. Lighting system shall be controlled through
MCB provided in lighting panel.
1.06 A lighting panel each shall be located at grade level and at other in between
levels as required. All distribution boards, aviation lighting controls, etc. shall
be located at grade level only. At each platform, 1 No. 63A, 415V welding
receptacle and 1 No. 15A, 240V receptacle shall be provided. Wiring
installation for lighting fixture shall be of PVC insulated copper/aluminum
wires through galvanized steel conduits.
1.07 Aviations obstruction lighting system shall conform to the requirements of the
latest rules and regulations of the International Civil Aviation Organization
(ICAO), National Airports Authority (NAA) and Directorate of Air Routes
and Aerodromes (DARA). The type of aviation obstruction lighting system
shall be of high intensity aviation obstruction lights having an intensity of
4000 to 200000 cd depending upon background illuminance. The aviation
obstruction lighting system shall be of type FTB205 and FTC 110N of Flash
Technology Corporation of USA or equivalent. A minimum of three levels
will be provided with aviation obstruction lights and there will be four lights
per level The obstacle lights shall flash simultaneously at a rate between 40
and 60 per minute. Aviation obstruction lighting shall be provided as per the
approved drawings. Aviation obstruction lighting shall be complete with
lights, photo cell, controller, special cables, etc.