Squirrel Cage DOL/Y-D Starting Motors
MARATHON Electric presents CHALLENGER Series TEFC Squirrel cage motors with excellent product features and outstanding performance parameters. The design of this range is based on advanced technical know-how and the level of excellence associated with this international company manufacturing motors in India for more than half a century. Stringent quality control procedures are adopted at each stage of production as a part of the company policy to ensure that each motor is manufactured to the requisite quality standard ensuring customer satisfaction.
KEY FEATURES
Confirms to IEC 60079-0/ IEC 60079-15/ EN 60079-0/ EN 60079-306
Class F insulation and Class B rise
Bi-directional fan
Specifications
Frame Sizes: IEC 80 – IEC 355
Power Rating: 0.37 kW to 375 kW
Power Supply: AC 3 Phase 415V, 50Hz
Pole: 2 to 8
Protection: IP55 (IS 4691)
Insulation Class: Class F with temperature rise limited to class
Applications
Pumps, Machine tools, Crane & hoist, Agitator, Fans, Material handling, Textile Machinery, Packing Equipment, Compressors, Plastic extruder, Stone Processing Machinery, Oil Expeller
Squirrel Cage VFD Starting Motos
Marathon Electric proudly presents the SCV and TCV series motors, specially engineered for variable speed applications using inverter drives. Designed with enhanced dielectric strength and superior thermal margins, these motors outperform general-purpose motors in demanding environments. Whether your application demands constant torque, variable torque, or constant power, Marathon inverter-duty motors deliver precise control, efficiency, and durability.
Specifications
Voltage Range: 200V to 690V
Standard Supply: 3 Phase, 415V ±10%, 50Hz ±5%
Cooling Types: IC411, IC410, IC416, IC418
Protection: IP55 standard (IP56+ on request)
Insulation Class: Class F (Class H optional)
Duty Types: S3, S4, S5
Key Features
Inverter Duty Ready: Optimized for use with PWM-driven IGBT inverters.
Multi-dip varnish and vacuum impregnation
Special winding wire and overhang tapes
Designed to withstand up to 1700V peak voltages
Force Ventilation: Optional FV units for reliable performance across speed ranges
Vector Control Compatibility: Ideal for advanced closed-loop systems requiring encoder feedback
EMC Compliance: Meets EN50081 (emissions) & EN50082 (immunity
Bearing Protection: Insulated bearing housings for higher frames to prevent bearing current damage
Applications
Material handling equipment (cranes, hoists – with optional brakes)
Precision machinery (CNC, robotics with encoder feedback)
High-inertia drives and process control setups
Textile, Paper, Cement, and Steel industries
KS Slipring Motors
Marathon Krane Range Motors have been specifically designed for crane applications and the mechanical features are such that they are particularly suitable for this duty.
Key Features
Metric dimensions as per IECR: 60072-1/ IS1231.
Totally enclosed weather protected IP55-IC411.
High ratio of pullout torque/rotor inertia
Ratings up to approximately 450kW.
Larger outputs available for certain specific requirements.
Supply voltages up to 690 Volts.
Ambient temperature 45°C (upto KS 315 frame) and Ambient temperature 40°C (KS 355 Frame – KS 500 Frame).
Insulation class F/F (stator/ rotor) with temperature rise limited to class B/B.
Specifications
IEC: 60034 -1, IS: 15999-1 & 1-03-003-08
Frame Sizes: IEC 112 – IEC 560
Power Rating: 2 kW to 450 kW
Power Supply: AC 3 Phase 415V, 50Hz
Pole: 6 to 10
Protection: IP55 (IS 4691)
Applications
Long travel, cross travel, driving, hoisting, hauling, and other intermittently operated machinery in the metal industries.