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 35 of 63
(iii) Rotation 4 X 90 deg.
(iv) Earthing stud Inside Terminal Block
4.0 Cooling -TEFC -Effective irrespective of direction of
rotation
5.0 Quality of operation
(i) Vibration intensity Shall be limited as per IS 12075-1986.
(ii) Noise level As per IS: 12065-1987
(iii) Balancing Motors shall be dynamically balanced with
full key on the shaft-end and fan
6.0 Electrical design
(i) Power Supply
• 415 V +10 & -15% • 50 Hz +/-6% • 3-
phase, 4-wire AC • 50 kA for 1 second,
solidly earthed.
(ii) Starting DOL
(iii)
Min Voltage for Start &
Run
85 % of rated voltage at terminal
(iv) Starting Torque >= 160 % Rated Torque
(v)
Breakdown or pullout
torque
Minimum 275 % of the rated torque
(vi) Starting current <= 600% Rated current
(vii) Duty S1/ ……or as specified in TS For crane duty
S5 40% with 150 start/hour. For conveyor
application S-3 and 6 starts / hr For
continuous duty-efficiency class EFF-1.
(viii) Starts/Hour permissible 3 equally spread or 2 in quick succession
from cold or one hot start, under rated load
condition..
(ix) Max speed permissible 120% over speed for 2 minutes
(x) Overload capacity
Capable of withstanding 60% Overload for
15 sec.
(xi) Efficiency
All continuous duty motor (S1-100%) shall
be of high efficiency confirming to eff2 class as
per IEEMA-192000 .
(xii) Derating Motor designed at 50 deg.C shall be
derated suitably for mentioned ambient
temperature .
(xiii) Motor connections Motor with frame size 90 shall be
connected in star and of frame sizes more
than 90 shall be connected in delta . For
delta connected motors 6 leads shall be
brought out .
(xiv) Insulation Class F
(xv) Minimum Permissible
temperature rise
Limited to class 'B' (120 deg absolute)
(xvi) Torque Type Normal / High / High slip type / Stall
Torque type (as required for the specific
application)
(xvii) Space Heater Out door motors above 45 kW Indoor Motor
above 110 kW