NATIONAL ALUMINIUM COMPANY LIMITED - Rites

All equipment shall be complete with approved safety devices wherever potential hazard to
personnel exists and with provision for safe access of personnel to and around equipment for
operational and maintenance functions. The design shall include all reaso reasonable precautions
and provisions for the safety of operating and maintenance personnel.
Special care shall be taken to make enclosed equipment proof against entry of rats, lizards and
other creeping reptiles which may create electrical short short- circuits inside side live equipment.
MINOR CIVIL WORKS
Minor civil works associated with cabling, earthing, conduit installation, illumination systems,
lighting poles, for buried cables, for erection of equipment supplied by the Bidder, foundation
of lighting masts/poles, es, etc shall be included under scope of bidder. Similarly minor civil works
like widening of floor openings / cable trenches, wall opening for cables, minor chipping, etc
shall be included under scope of bidder.
LOCAL CONTROL STATION
Near all drives local cal control stations shall be provided. Local stations shall have Cast
Aluminium body, dust and vermin proof, and structure mounting. Stat and stop push buttons
shall be mounted on front hinged gasketted and lockable door. Local/remote selector switches
shall all be provided on local control stations. Stop push button shall be lockable type. In addition,
ammeters shall be provided on local control stations for HT drives. Suitable knockouts with
glands shall be provided on the bottom or top cover for cable entry entry. . Terminals shall be suitable
for 2 cores of 2.5 sq.mm conductors with 10% spare terminals. Enclosure shall be conforming
to IP55 with proper rain canopy.
ELECTRICS OF DUST SUPPRESSION SYSTEM
Bidder shall include complete electrics of dust suppression systems coming in the scope within
the battery limit. Bidder shall provide complete electrics including MCC, drives/mechanism,
associated cabling & their termination, local DBs, all power and control ccessories, all related
annunciations, etc.
ELECTRICS OF AIR-CONDITIONING CONDITIONING AND VENTILATION SYSTEM
Bidder shall include complete electrics of air air-conditioning conditioning system and ventilation system.
Complete electrics for the following shall be included:
• Ventilation system for the switchgear cum MCC room at WT SYSTEM substation
• Exhaust fans for the two numbers transformer rooms at WT SYSTEM substation
• Air-conditioning conditioning system for the battery and battery charger room at WT SYSTEM
substation
• Ventilation system stem for dust suppression MCC room
WT SYSTEM ELECTRICS OF HOISTING AND HANDLING EQUIPMENT
Technical Specification:Sec-6, Electrical
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