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 36 of 63
(xviii) No. of Poles
4 pole (unless specific drive requirement or
economics call for other poles).
(xix) Testing
As per approved QAP during engineering
stage .
(xx) Mounting Normally horizontally foot mounting . Other
type of mounting as per specific
requirement .
Sl.No.
Parameters Description
1.0 Standard IPSS:1-03-001-92, IPSS 1.03-004-93 , IS
325 , IEC 34 & IEC 72
2.0 Application Slip ring induction motors shall be used
only for drives of charging cranes . Slip ring
motors shall be employed for intermittent
duty drives requiring frequent switching
operations and speed control and for heavy
drive applications requiring high starting
torque and meeting frequent overload
conditions.
3.0
Constructional
Features
(i) Frame size & rating As per IS 325 Use of motors in frame sizes
above 400 shall be avoided on cranes .
(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 . -All motors to have continuously
rated slip rings.
(v) Protection for Motor &
Bearing
IP55 degree of protection as per IS : 4691.
(vi) Shaft ends & Extension -Shall be of high grade steel . -Cylindrical
as per requirement -Proper drilling and
tapping shall be provided for mounting of
tachos for speed feedback (if required ) in
non drive end or shaft shall be extended
with different diameter and length .
Tapered shafts for all crane drive motors
shall be provided. Motors in 225 and above
frame size shall have tapered shaft (1:10) .
-Provision of double identical shaft
extension (cylindrical & taper) to be made
(in case of requirement for a particular
application) .