Technical data

CHAP-04.10 ELECTRICAL POWER DISTRIBUTION, DRIVES, CONTROL &
ILLUMINATION ELECTRICAL
Page 23 of 50
bearings and winding temperature.
c) Combined fault HT switch gear for Each HT motor including
power supply to MPR failure separately.
e) Switching devices, flaps etc failed to close or open.
f) Individual annunciation for HT motors bearings and winding
temperature high alarm.
g) Individual annunciation for following conditions of electrical
system:
- 11KV and 6.6 kV switchgear trouble
- 415 switchgear trouble
- Transformer trouble alarm.
- Combined fault/trouble in bag filter system of D.E
- Unhealthiness of various machines
- Any other failures
h) Every unplanned stoppage or abnormal condition will be
brought to the notice of operator.
7. Current readings of all HT and LT motors connected to Intelligent
MCC will be available in HMI at Dispatcher. Current monitoring for
drives of rating above 30KW.
8. Drainage/sump/slurry pump will be provided with Auto/Local mode of
operation. Under automatic mode of operation any one of the pump
motors will start automatically at set level and if the level rises further
the second/ reserve pump will start automatically at second set level
and both the pumps will stop at set low level. If the first pump trips,
second pump will start automatically. Emergency high level
annunciation will be available in the control room.
Under local mode of operation, the pump motors will start/stop locally
through local control boxes depending on level.
9 For fire fighting system, suitable control system will be provided for
main fire water pump, jockey pump, hydro pneumatic tank etc. with
line pressure switch.
04.10.11. ELECTRICS AND AUTOMATION FOR EXISTING DRIVES
Scope of work for Electrics and Automation for up gradation,
modification and integration of existing conveyors to be upgraded as per
technological requirements and will consist of Complete new MCC, PLC,
field switches, LCS, Power and control cables and New Brake panel and
associated cables.
Gallery lighting of existing conveyors under up-gradation will be in the
scope of Contractor. Dismantling of the existing light fittings, cables etc.
will also be under the scope of the Contractor.
Contractor will provide new PLC based automation system for new and