Technical data

EPI – New Delhi Volume-2B, Rev.0 Page 5 of 11
iii) Contractor has to furnish list of item wise spares for 2 years O&M along
with unit rate. The item rates will be valid upto 12 months from last
consignment at site
iv) All anchor bolts & nuts, washers, foundation bolts, shear lugs, counter
flanges for inlet and outlet of each compressor, receivers and connected
piping & base frame for equipment. Miscellaneous materials and
services, if not otherwise specifically mentioned will be included, but not
limited to nuts, bolts, washers, gaskets, necessary connections for hook
up with employer’s pipe network and equipment.
vi) List of spare parts for 2 years operation & maintenance.
vii) Supply of first fill of lube oil & consumables and also for testing,
commissioning and performance guarantee. Specification of all
consumables will be indicated.
viii) Commissioning spares (All spares used until the plant is handed over to
the employer).
SPECIFICATIONS OF MOTOR SOFT STARTER
To avoid impact on electrical system due to heavy motor starting current, a soft
start system limiting motor current to 2 to 2.5 times shall be provided to
ensure voltage drop at motor terminals limited to 15% with a provision of DOL
starting. Contractor to submit the voltage drop calculation, considering
adequate fault level at 6.6 kV board.
The soft start system shall be based on principle of flux compensated non-
saturated magnetic amplifiers for control of motor starting current. Also, the
starter should not introduce any harmonics into the system.
The flux compensated magnetic amplifiers shall work on principle of flux
opposition and operate in the linear non saturable zone of magnetic circuit. The
system will work on constant mode in the starting zone so as to result in
smooth start.
The enclosure class shall be IP52.
The Sheet steel thickness shall be 1.6 mm.
The control circuit will utilize auxiliary contacts and timers for starting function.
Lamp indication shall be provided using LED type lamps.
Ammeter shall be provided on front door.
The cubicle will have cable entry and exit from bottom through gland plate.
Bypass device used shall be 6.6kV contactor.