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 42 of 63
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)
-Pedestal 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
xiv) RTD & BTD ( PT100 type) − All motors shall be provided with Bearing
(DE & NDE) temperature detectors and 6
nos. stator winding temperature detectors,
RTDs for monitoring alarm and trip
conditions. RTD's shall be of PT100 type
(duplex). − Analog input cards shall be
provided in PLC for online monitoring of
bearing (DE & NDE) and winding
temperature of HT motors above 1000 KW .
− For HT motors, temperature of each RTD
(for winding / bearing) shall be wired to
PLC system and limit value contacts for
alarm and tripping shall be generated in the
PLC along with the display of all parameters
of the motor including the winding and
bearing temperature.
xv) Vibration monitoring − Vibration monitoring (online) shall be
provided at the DE end of motor bearing for
motors of ratings 1000 kW and above and
it should be connected to PLC for online
monitoring .
xvi) Paint shade − Light grey , shade no. 631 as per IS 5
3.0 Terminal box
i) Protection IP -55
ii) Type Phase segregated