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 34 of 63
7.0 TECHNICAL SPECIFICATION FOR MOTORS
1 Low voltage squirrel cage induction motors :
2 Low voltage slip ring induction motors (Only for cranes and mill duty):-
Sl.No.
Parameters Description
1.0 Standard IPSS 1-03-001 / IS 325 / IEC 34 & IEC 72
2.0 Constructional Features
(i) Frame size & rating As per IS 325
(ii) Motor body Grey iron casting as per IS:210-1978
(iii) Motor Feet Integrally cast with the stator
(iv) Body Design -Prevent breakage or other failures due to
vibrations normally encountered in heavy
industries . -Motors shall be of weather
proof construction. -Designed to operate in
the humid air stream -Drain plugs to be
provided .
(v) Protection for Motor &
Bearing
IP -55 (with canopy for motor if installed
outdoor)
(vi) Shaft ends & Extension Cylindrical as per requirement Proper
drilling and tapping shall be provided for
mounting of tachos for speed feedback (if
required ) Crane motor in 225 and above
frame sizes shall have tapered shaft (1:10)
( New point)
(vii) Bearings -For motor of rating upto 5 kW, ball
bearings shall be used for both DE & NDE
end. -For ratings above 5 kW the DE end
shall be provided with roller bearing and
NDE end shall be provided with ball
bearing. -Bearings for motors shall be of C3
clearance . -Bearings shall be suitable for
running of motor in either direction.
(viii)
Hazardous Area safety
design
As per requirement
(ix) Canopy To be provided for all outdoor motors .
(x) Greasing point At DE & NDE sides .
(xi) Paint shade
Light grey shade 631 as per IS:5 or RAL
7030 (grey).
(xii) Direction of Rotation For crane and mill duty motors : reversible
For general purpose continuous duty motor
: Bidirectional (New point)
3.0 Terminal box
(i) Location Location on top preferably
(ii) Suitability -4 Core Aluminium Cable -Extension shall
be done to receive the aluminium cables to
avoid cramping of the cables in the
terminal box .