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 43 of 63
iii) Location − RHS viewed from DE / On top − 01 nos.
each on opposite sides of motor in case of
Differential Protection (or not) / Neutral TB
opposite to main TB
v) Suitability − Termination of XLPE cables with heat
shrinkable cable end seals. − Each terminal
box to have two inlets to accommodate any
parallel cables as required.
vi) Reversible To suit cable entry from Top / Bottom
vii) Earthing stud
Inside TB for protective earth conductor
termination
viii) No. of terminal boxes Separate for Space heaters, RTDs / BTDs ,
Vibration monitor etc
ix) Fault withstand (Min.) Rated Short circuit level of the system
voltage for 0.25 sec
4.0 Cooling TEFC / CACA / CACW CACW system shall
be complete with temperature and pressure
monitoring devices.
5.0 Quality of operation
i) Vibration intensity Limited to 37.5 micron peak to peak.
ii) Noise level Continuous noise level should not exceed
85 db A at a distance of 1.0 m from the
motor body as per IS: 12065-1987.
iii) Balancing Dynamically balanced with full key on shaft
end and fan
2.0 Design Motors shall be of cylindrical design with
brush less excitation system and automatic
voltage and power factor regulation.
3.0 Power factor 0.9 or better.
4.0 Motor winding Motor stator winding braced for full voltage
starting. Squirrel cage type winding with
short circuited rotor bars for producing
starting torque and accelerating torque to
bring the synchronous motor upto the
speed All the three windings stator , rotor
and exciter shall be VPI (Vacuum pressure
impregnation) .
5.0 Bearings Small frame size motors shall have
endshield bearings and large motors shall
have pedestral bearings .
6.0 Cooling All the three modes of cooling arrangement
as per requirement • Open air (for the
areas where air is relatively clean e.g water
supply pump houses) • Air to water (in
closed cooling circuit) • Air to air cooling
(ID fan etc.) . A shaft mounted fan or a
separate fan to be provided for air
circulation .