Specifications

Enquiry Specification for Wagon Tippler with Side Arm Charger and Associated works
NRO/CON/WT/533
EPI – New Delhi Volume-2B, Rev.0 Page 39 of 63
(xxiii) Mounting Normally horizontally foot mounting . Other
type of mounting as per specific
requirement .
(xxiv) Derating Motors shall be derated considering all the
factors − variation in voltage and frequency
. − Ambient temperature − Thermal ability
due to constant and variable losses of the
motor − Type of load driven
03. HIGH VOLTAGE SQUIRREL CAGE INDUCTION MOTORS
Sl.No.
Parameters Description
1.0 Standard IPSS 1-03-018/IS 325
2.0
Constructional
Features
i). Frame size & rating As per IS 325
ii) Stator Frame Fabricated Steel / High grade cast Iron
iii) Stator Core
Laminated sheets of high grade low loss
silicon steel
iv) Motor body Grey iron casting as per IS:210-1978
v) Casing Feet Integral with the motor frame
vi) Body Design Prevent breakage or other failures due to
vibrations normally encountered in heavy
industries
vii)
Protection for Motor &
Bearing
IP – 55 as per IS 4691-1985.
viii) Shaft Forged Steel shaft
ix) Bearings (below 1000kW
)
Anti-friction Bearing with Regreasing facility
& with grease quantity controllers
Bearings (1000kW &
above)
-Pedestral type sleeve bearing with forced
oil lubrication. (Arrangements to be
incorporated to prevent lubricating oil from
reaching the windings) . -Bearing
temperature, lubricating oil temperature
and pressure to be measured and
monitored .
x) Vibration monitor
Shall be provided at the DE end of motor
bearing
xi) Pedestals insulation Against circulating shaft currents
xii)
Hazardous Area safety
design
NA / as specified
xiii) Indication of direction of
rotation
By Arrow blocks on non-driving end