Marathon

MARATHON Electric presents KD series TEFC squirrel cage motors specifically designed for DOL operated Crane duty / intermittent duty application. The motors are designed to take care of the high electrical and mechanical stresses arising due to frequent starts stops associated with intermittent duty application. The motors are compact providing high output for a given frame size and have low inertia. These salient features make them most suitable for EOT Cranes. "

MARATHON Electric presents CHALLENGER Series TEFC Squirrel cage motors with excellent product features and outstanding performance parameters. Range 0.25 kW to 400 kW Frame IEC 80 to 355 in cast iron Mounting Foot/Flange/Face Pole 2 to 8 Others on request Frequency 50 or 60 Hz Ambient -40 to 65 C Others on request Protection IP 55 Others on request Feature Complying to all international standards Totally enclosed fan cooled sq. cage Alpower Aluminium Body squirrel cage motors upto IEC frame 180L Challenger series squirrel cage motors Integral feet rugged cast iron construction Energy efficient eff2/eff1 Rationalized product features Eff 1 in line with is:12615 / CMEP 600% max. stg. current Rtd / btd ( frame 280 onward ) Low noise level 60hz. supply ce / csa marking Class hinsulation 55 deg. ambient APPROVED BY MAJOR CONSULTANTS LIKE NTPC / BHEL / EIL

Fabricated Robust Steel construction for frames. Uniform internal cooling circuit. Axial Cooling for smaller ratings, both radial and axial ventilation for larger ratings. Basic mounting dimensions as per IS. Class insulation system, both Resin rich & Resin poor (VPI) varieties available. Rotors are dynamically balanced Rotor bars are brazed with end rings by One Shot Brazing process. Environmentally friendly motors to meet all Drives Fault tested Phase Segregated Terminal box. RTD, BTD, Dial type Temperature indicator available. Separate Terminal Box available for Neutral point, RTD, BTD termination purpose. Provision for Magnetic Slot Wedge to improve Efficiency, Power Factor and improve Electromagnetic noise Provision for special Epoxy paint syste

One of Indias most modern motor factories, incorporating extensive CAD facilities with over 50 years experience in the design and application of induction motors, enables MARATHON Electric to offer the benefits of proven solutions : MARATHON Electric has over 2000 MW installed world-wide. Upto 2500 KW range capability. All speeds available. Highest available efficiency rapid pay-back. High Power Factor Low Power Cost. 20 years expected design life at 1000 starts per year Resivac VPI Insulation System for total winding reliability. Highest quality lowest maintenance costs. Low Noise Level Better performance than IS: 12065. Low vibration level conforms to IS: 12075. IP 55 enclosure protection as standard on enclosed machines. Factory fixed Air Gap. Compliance with National and International Standards. Built to type N requirements. Upto 6.6 kV, 50 or 60 Hz. supply. Low Starting Current design available. Variable speed drive compatibility. Horizontal mounting. Rolling or Plain Bearings. Environmentally friendly motors to meet all drives. Type version available on request. "

MARATHON Electric introduces VD series motors tailor made for inverter drives having enhanced dielectric strength and adequate thermal margin suitable for variable speed application. PWM technology involving high switching frequency IGBT drive has enabled AC induction motors to be operated as variable speed drives. However, there had been a documented increase of premature winding failure for standard general purpose motors when operated with inverter drives. High and steep front voltage spikes (dV/dT) produced by latest generation IGBT drives associated with the phenomenon of voltage wave reflection due to longer cable length imposes stress on the motor winding resulting rapid ageing and deterioration of insulation system.

Standard Standard Indian International IS IEC NEMA' Dimensions IS 1231 IEC 60072 - 1 MG1 Part 4 IS 2223 Performance IS 325 IEC 60034 - 1 MG1 Part 12 Output IS 1231 MG 1 Part 10 Protection IS 4691 IEC 60034 - 5 MG I - 1.268 Mounting 152253 IEC 60034 - 7 MGI NO 4

Type RW – A symbol of versatility The type RW motors have been designed basically for heavy duty use with driven machine imposing overloads and severe mechanical shocks and vibrations. These motors are equally suitable for smooth constant loads since the motors are also designed with high efficiency and power factor. Because of optimum utilisation of materials, with improved ventilation techniques the motors are 10 – 15% lighter in weight and yet more rugged because of their inherent special construction. Because of high Pull Out Torque and inherent thermal margin kept for high slip operation these motors are ideally suited for rerolling mills and cane cutter/cane crusher/care leveller/cane fiborizer applications pertaining to sugar industries. Because of high efficiency and power factor these mtors are also suitable for pump/fan applications.