Introduction:
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.
Technical Specifications:
| Model series | Frame Size | Pole | Power Output |
|---|---|---|---|
| SCV | 80 - 355 | 4P | 0.37 kW – 375 kW |
| 6P | 0.37 kW – 315 kW | ||
| TCV | 80 - 355 | 4P | 0.37 kW – 375 kW |
| 6P | 0.37 kW – 315 kW |
- 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
- Permissible Speeds: Up to 6000 RPM depending on frame size
Key Features:
- Inverter Duty Ready: Optimized for use with PWM-driven IGBT inverters.
- Enhanced Insulation:
-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:
Marathon SCV and TCV motors are tailored for:
- 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
Whether it’s energy savings in variable torque or tight control in constant torque applications, these motors deliver.
Certifications & Standards:
Manufactured to comply with national and international standards:
| Standard | Scope |
| IS/IEC 60034 Series | Dimensions, performance, protection |
| IEC/TS 60034-17/25 | Inverter-fed motor specifications |
| MG1 Pt.31 | NEMA compliance for inverter-fed duty |
| EMC | EN50081, EN50082 |
- Thermistor Protection: PTC140 standard (PTC160 for Class F rise)
- Meets Total Harmonic Distortion (THD) is less than equal to 5%
- Designed to handle dv/dt up to 5600
Optional Accessories:
NDE Shaft extension suitable for encoder mounting arrangement for feedback control.
External Electromagnetic Brakes (Frame sizes 80M to 160L)
Forced Ventilation Units for extended low-speed operations
