3-phase induction motors
IE3 Premium efciency
Variable and xed speed
Frame size 315 to 500
150 to 1500 kW
IMnity
®
Liquid cooled motors - LC series
The LC induction motors in this catalog are designed to achieve very high efciency
levels and operate at variable speed.
This catalog contains technical information about motors in the IE3 efciency class
(Premium efciency) which can be used on an A.C. supply and also on a drive.
On request, Leroy-Somer is able to offer IE4 motor solutions.
All the motors in this catalog can be used at variable speed depending on the specied
conditions.
All 2, 4 and 6-pole motors, rated 0.75 to 375 kW, offered for sale on the
European Union market must be efciency class IE3 or IE2 and used
with a variable speed drive:
- from 01/01/2015 for 7.5 to 375 kW ratings
- from 01/01/2017 for 0.75 to 375 kW ratings
In addition, to be eligible for efciency class IE3, the water inlet
temperature for water-cooled motors must be between 0°C and 32°C.
3
Leroy-Somer - Liquid-Cooled Motors - LC Series - 5370 en - 2019.09 / c
IMnity
®
- LC Liquid-Cooled 3-Phase Induction Motors
Contents
GENERAL
Introduction ...........................................................................4
Quality Commitment .............................................................5
Directive and Standards Relating to Motor Efciency............6
Standards and Approvals ......................................................7
Regulations in the Main Countries ......................................10
ENVIRONMENT
Denition of “Index of Protection” ........................................11
Environmental Limitations...................................................12
Impregnation and Enhanced Protection ..............................13
Heating ...............................................................................14
External Finish ....................................................................15
Interference Suppression and Protection of People ............16
CONSTRUCTION
Bearings and Bearing Life ...................................................17
Lubrication and Maintenance of Bearings ...........................18
OPERATION
Duty Cycle - Denitions .......................................................19
Supply Voltage ....................................................................22
Insulation Class - Temperature Rise and
Thermal Reserve ................................................................24
Starting Times and Starting Current ....................................25
Power - Torque - Efciency - Power Factor (Cos ɸ) .............26
Noise Level .........................................................................29
Weighted Sound Level [dB(A) .............................................30
Vibrations ............................................................................31
Performance .......................................................................33
Starting Methods for Induction Motors ................................34
Braking ...............................................................................38
Use with a Variable Speed Drive .........................................40
Operation as an Asynchronous Generator ..........................47
Special Environments .........................................................49
TECHNICAL CHARACTERISTICS
Designation.........................................................................50
Identication .......................................................................51
Description of an LC Motor basic conception ......................53
Cooling ...............................................................................54
Standard Equipment ...........................................................56
Optional Features ...............................................................57
Handling .............................................................................58
ELECTRICAL CHARACTERISTICS
IE3 Mains Supply ................................................................59
IE3 Variable Speed Drive Supply ........................................61
Terminal Block Connection .................................................63
MECHANICAL CHARACTERISTICS
Mounting Arrangements......................................................64
Terminal Box Connection ....................................................65
Dimensions of Shaft Extensions .........................................69
Dimensions of Foot Mounted IM 1001 (IM B3) ....................70
Dimensions of Foot and Flange Mounted IM 2001
(IM B35) ............................................................................. 71
Dimensions of Flange Mounted IM 3001 (IM B5)
IM 3011 (IMV1) ...................................................................72
Dimensions - Water Connecting Flange ..............................73
Bearings and Lubrication ....................................................74
Axial Loads .........................................................................75
Radial Loads .......................................................................77
APPENDIX .........................................................................83
Congurator ........................................................................91