Technical data

CHAP-04.10 ELECTRICAL POWER DISTRIBUTION, DRIVES, CONTROL &
ILLUMINATION ELECTRICAL
Page 28 of 50
belt switch depend upon selection of control mode. Necessary electrics
will be provided for desired operation of pumps, compressors, valves etc.
for DS system. DS system will be interlocked with corresponding
conveyors / technological equipment. DS system will have local manual
and remote auto mode control. Compressor may be connected to
nearest MCC considering location of Compressor house.
Control panel for outdoor application will have weatherproof enclosure.
04.10.13.08. DUST EXTRACTION SYSTEM
The Dust Extraction System will be started first and will be suitably
interlocked with corresponding conveyors / technological equipment.
The equipment of D.E. system will be operated in sequence as per
requirement in the REMOTE mode from the HMI. Power supply to bag
filter panel will be interlocked with the DE fan. Bypass arrangement will
be provided such that technological equipment may be operated without
operation of DE system in case need arises.
Electrics for Bag Filter System of DE System.
The bag filters of D.E. system will consist of pressure switches cum
indicator in the compressed air line, differential pressure switches,
solenoid valves, control panel and all other associated equipment. The
brief specification of the major components will be as given below:
01 Control panel for Bag filter
The control panel will be free standing floor mounting fabricated from 2.5
mm thick CRCA sheet steel on a base channel or 250 mm height
provided with cable gland plates, having synthetic rubber gasketting
provided with double door & canopy and enclosure conforming to IP-55.
The control panel will be factory assembled, wired with 1.1 kV grade
PVC flexible wire of copper conductor (minimum size 2.5 sq.mm),
factory painted. The control panel will be provided with following major
equipment :
a) Incoming switch (minimum 30A, AC23 duty) with operating handle
inter-locked with the door, HRC fuses, contactors, MPCBs in the
various circuits.
b) Control transformer or required VA rating having +/-5 percent and
+/- 2.5 percent tapings in the primary side of the control
transformer with Isolating switches/ MCBs in the primary &
secondary sides.
c) 24V DC power pack complete with fitter and protective elements
and also isolation cum short circuit protection both at AC and DC