Technical data

CHAP-04.10 ELECTRICAL POWER DISTRIBUTION, DRIVES, CONTROL &
ILLUMINATION ELECTRICAL
Page 6 of 50
in this package of FFP. Suitable control cable and other accessories
will be considered.
3. VVVF converters :
 VVVF converters for 415 V motor drives having requirement of
speed control where process requirement calls for variable speed
application. All drives will have communication capability with
Plant Automation System.
 VVVF Converter having communication capability as above at
medium voltage (like 690 V) complete with 3 winding Converter
transformer (for 12 pulse configuration) & incoming ACBs for
higher rated motors.
 VFD will have following features:
 Minimum rating of AC drives and reactors will be 150% of
the full load current of the motor.
 Automatic disconnection of individual Motor in case of
failure of AC drive.
 Use of isolation transformer for more than 90 KW drive and
use of series reactor for less than 90 KW drive for VFD
application.
4. Soft Starter :
 All HT Motors for conveyor drives will be provided with Flux
Compensated Magnetic Amplifier (FCMA) Soft starter for low
starting current. FCMA soft starter will have suitable By-pass
contactors and controls to ensure running of the motor at full
speed. FCMA soft starter will be indoor duty, rugged in
construction, user friendly and maintenance free.
 FCMA Soft starter for HT conveyor motors will be connected to
motor at neutral end with suitable enclosure to prevent the dust
entry.
 Soft starter will be provided for LT motors of rating more than
75kW.
5. Dual parallel redundant UPS system consisting of SMF battery bank
for 30 minute back up incase of power failure, Battery charger, UPS
Power distribution boards & sub-distribution boards for distribution of
UPS power supply to control & Automation equipments,
Instrumentation system equipment, FDA system, Weighing system &
any other equipment as per requirements.
6. Local control stations housing push buttons, indication lamps etc. for
all drive. LCS for HT motor will have Ammeter also. All Local control
stations will have double doors. LCS for conveyors will have belt sway
switch bypass. Local/Remote selector switch will be mounted on MCC
& Control Panel and not on LCS.
7. Power distribution boards (PDB) with two incomers and one bus