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 40 of 63
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
iii) Location As per requirement 1 no. each on opposite
sides of motor.
iv) Winding star point − Winding star point shall be kept outside
in the motor for more than 200 KW HT
motor and other important HT motor . − In
case no differential protection is required,
star point of the winding may be formed
inside the neutral terminal box to be
provided on one side of the motor. The
phase segregated terminal box shall be
placed on other side of the motor.
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.