WEG M-Line Medium & High Voltage Induction Motors
The WEG M-Line Series (featured model: M-Line MAR 560 2,500 kW 11 kV 4-Pole) represents the ultimate custom-engineered solution for heavy industrial applications requiring supreme reliability, flexible configurations, and high power ratings. Designed with a robust modular steel or cast-iron frame construction, the M-Line accommodates multiple cooling methods (including IC01/IP23 open, IC611/IP55 air-to-air, and IC81W/IP55 air-to-water exchangers). Spanning power outputs from 280 kW up to 50,000 kW across IEC frame sizes 280 to 1400, the M-Line handles voltage levels from 1,200 V up to 13,800 V (13.8 kV). It is widely specified across global heavy industries for driving main process compressors, high-pressure water injection pumps, raw mill grinders, petrochemical extruders, and power plant draft fans.
Technical Specifications
| Featured Model | M-Line MAR 560 (2,500 kW / 3,350 HP, 4-Pole, 11 kV, IEC 560 Frame) |
|---|---|
| Brand / Manufacturer | WEG |
| Product Series | M-Line (MGA, MAR, MAF, MI) Modular High Voltage Motor Series |
| Power Range Covered | 280 kW to 50,000 kW (375 HP to 67,000 HP) |
| Voltage Ratings | 1,200 V up to 13,800 V (13.8 kV), 50 Hz / 60 Hz |
| Frame Sizes (IEC) | 280 to 1400 (Custom Fabricated Steel or Cast Iron Modular Frame) |
| Cooling Methods | IC01 (Open Drip Proof), IC611 (TEAAC air-air), IC81W (TEWAC air-water), IC411/IC416 |
| Protection & Bearings | IP23 to IP66 / Rolling Element or Sleeve Bearings with Forced Oil Systems |
Documentation & Resources
WEG M-Line High Voltage Power & Voltage Selection Matrix
Indicative selection matrix for standard WEG M-Line 4-pole induction motors across key industrial voltage ratings (50 Hz):
| Motor Power (kW / HP) | Voltage Level | IEC Frame Size | Typical Cooling Method | Typical WEG Model Code |
|---|---|---|---|---|
| 500 kW (670 HP) | 3.3 kV / 6.6 kV | 355 / 400 | IC611 (Air-Air) | M-Line MAR 400 500kW 6.6kV |
| 1,250 kW (1,670 HP) | 6.6 kV / 11 kV | 500 / 560 | IC611 / IC81W | M-Line MAR 500 1250kW 11kV |
| 2,500 kW (3,350 HP) | 6.6 kV / 11 kV / 13.8 kV | 560 / 630 | IC611 / IC81W (TEWAC) | M-Line MAR 560 2500kW 11kV |
| 5,000 kW (6,700 HP) | 11 kV / 13.8 kV | 710 / 800 | IC81W (Air-Water) | M-Line MAR 710 5000kW 13.8kV |
| 10,000 kW (13,400 HP) | 11 kV / 13.8 kV | 900 / 1000 | IC81W (TEWAC) | M-Line MAR 900 10000kW 13.8kV |
| 20,000 kW (26,800 HP) | 11 kV / 13.8 kV | 1120 / 1250 | IC81W / Custom | M-Line MAR 1120 20000kW 13.8kV |
Legacy Large High Voltage Motor Replacement & Retrofit Guide
Replace obsolete custom motors or worn-out heavy HV drives with WEG M-Line modular, high-reliability designs:
| Legacy / Obsolete HV Motor | WEG M-Line Modular Equivalent | M-Line Solution Benefits |
|---|---|---|
| Old Fabricated Box-Frame HV Motors | WEG M-Line Series (MAR / MGA) Optimized Cooling | Complete flexibility in cooling system selection (IC01, IC611, IC81W), reduced noise level, and low vibration. |
| Process Drives with Fragile Bearings | M-Line Heavy Sleeve Bearing Option Continuous Duty | Self-lubricated or forced-lubrication sleeve bearings designed for extreme radial and axial thrust loads. |
| Space-Constrained Retrofit Sites | Custom M-Line Footprint Design Tailored Design | Custom shaft heights, mounting hole dimensions, and terminal box locations to match existing civil foundations. |
Expert Technical Sourcing & Large HV Industrial Project Integration
The core advantage of the WEG M-Line series lies in its tailored modular architecture. Depending on site constraints, motors can be configured with air-to-air (TEAAC) or air-to-water (TEWAC) exchangers, sleeve or rolling element bearings, integrated PT100 RTD temperature sensors, differential protection current transformers, and Vacuum Pressure Impregnation (VPI) insulation qualified for hazardous areas (ATEX / IECEx). Our engineering team assists with full torque curve verification, starting duty analysis, and VFD drive compatibility checks for medium-voltage applications.
Core Benchmark Model Standard Configurations
- M-Line MAR 400 500kW 6.6kV
- M-Line MAR 450 800kW 6.6kV
- M-Line MAR 500 1250kW 11kV
- M-Line MAR 560 2500kW 11kV
- M-Line MAR 630 3150kW 11kV
- M-Line MAR 710 5000kW 13.8kV
- M-Line MAR 900 10000kW 13.8kV
- WEG M-Line TEWAC IC81W
- WEG M-Line TEAAC IC611
- WEG M-Line Sleeve Bearings
- WEG M-Line MV VFD Compatible
- WEG M-Line Marine / ATEX Duty
