Technical data

CHAP-04.10 ELECTRICAL POWER DISTRIBUTION, DRIVES, CONTROL &
ILLUMINATION ELECTRICAL
Page 19 of 50
- HPSV lamp fittings will be provided with external electronic igniters
and a built in sensor to sense failure of lamp and switch off igniters.
- Single phase/three phase circuits are connected to RYB phase such
that total connected load to each phase equal and phase balancing is
achieved.
- Stroboscopic effect will be corrected by providing power factor
improvement capacitor and power phase distribution.
- Point wiring will be done through PVC insulated PVC sheathed
Copper cable.
- Single phase 3 pin 230V, 15A and 5A, switch-socket outlets will be
provided with interlocked switches (male and female units) at the
following locations:
o At each floor of building at every 30 m intervals or minimum one
for each row/side.
o Two numbers each in switch gear room, cable basement, control
room and MCC room.
- Group control and sectorial control will be envisaged through MCBs
provided in the respective LDBS. Separate control switches will be
envisaged for light points and fan points.
- Near every chute in Junction houses and other technological
buildings sufficient no. of 24V, 5A sockets will be provided for
maintenance lighting by hand lamp.
04.10.09. Cable Routes, Cables
Contractor will note the following requirements.
Sl.
No.
Requirement
Remarks
1.
EMPLOYERs’s HT
Substations to
Contractor’s LTSSs
Walkable Cable Bridge
2.
Inter shop cable
routing
Through walkable overhead cable
bridge/ structure/Cable Tunnel/ Conveyor
gallery. No underground buried cable will
be provided. Concrete cable trench
covered with pre cast slab is accepted
only in covered shed or indoor area.
3.
Bottom most level of
cable trench in MCC
room
Above ground level