WEG HGF High Voltage & Severe Duty Induction Motors
The WEG HGF Series (featured model: HGF 400 500 kW 6.6 kV 4-Pole) is built specifically for severe-duty industrial environments demanding massive mechanical strength, high starting torque, and superior thermal dissipation. Engineered with a heavy-duty FC-200 cast iron frame and a Totally Enclosed Fan Cooled (TEFC) design, the HGF series minimizes internal vibration, lowers acoustic emissions, and ensures continuous operational availability in aggressive environments. Covering power ratings from 90 kW up to 3,150 kW across IEC frame sizes 315 to 630, the HGF line caters to medium and high voltage power supplies ranging from 1,200 V up to 11,000 V (11 kV). Highly favored in mining, cement, paper, and steel processing industries, HGF motors reliably drive primary crushers, ball mills, heavy slurry pumps, axial blowers, and high-load conveyors.
Technical Specifications
| Featured Model | HGF 400 (500 kW / 670 HP, 4-Pole, 6.6 kV, IEC 400 Frame) |
|---|---|
| Brand / Manufacturer | WEG |
| Product Series | WEG HGF Severe Duty High Voltage Cast Iron Motor Series |
| Power Range Covered | 90 kW to 3,150 kW (125 HP to 4,200 HP) |
| Voltage Ratings | 1,200 V up to 11,000 V (11 kV), 50 Hz / 60 Hz |
| Frame Sizes (IEC) | 315 to 630 (High-Rigidity FC-200 Cast Iron Frame) |
| Efficiency Classes | IE2, IE3 (Premium Efficiency), and High-Efficiency Custom Ratings |
| Protection & Cooling | IP55 / IP56 / IP65 / TEFC (IC411) or Forced Ventilation for VFD (IC416) |
Documentation & Resources
WEG HGF High Voltage Power & Frame Size Selection Matrix
Selection matrix for standard WEG HGF 4-pole induction motors across common industrial voltage levels (1500 RPM synchronous speed at 50 Hz):
| Motor Power (kW / HP) | Voltage Level | IEC Frame Size | Efficiency Rating | Typical WEG Model Code |
|---|---|---|---|---|
| 250 kW (335 HP) | 3.3 kV / 6.6 kV | 315L/U | IE3 Premium | HGF 315L/U 250kW 6.6kV 4P |
| 400 kW (535 HP) | 3.3 kV / 6.6 kV | 355L/U | IE3 Premium | HGF 355L/U 400kW 6.6kV 4P |
| 500 kW (670 HP) | 3.3 kV / 6.6 kV / 11 kV | 400S/M | IE3 / High Efficiency | HGF 400S/M 500kW 6.6kV 4P |
| 800 kW (1,070 HP) | 6.6 kV / 11 kV | 450S/M | IE3 / High Efficiency | HGF 450S/M 800kW 11kV 4P |
| 1,250 kW (1,670 HP) | 6.6 kV / 11 kV | 500S/M | High Efficiency | HGF 500S/M 1250kW 11kV 4P |
| 2,000 kW (2,680 HP) | 6.6 kV / 11 kV | 560S/M | High Efficiency | HGF 560S/M 2000kW 11kV 4P |
| 3,150 kW (4,220 HP) | 6.6 kV / 11 kV | 630S/M | High Efficiency | HGF 630S/M 3150kW 11kV 4P |
Legacy High Voltage Motor Replacement & Upgrade Guide
Upgrade older fabricated box-frame motors or underperforming severe-duty units to the modern cast iron WEG HGF series:
| Legacy / Obsolete Motor Design | Modern HGF Series Equivalent | Key Mechanical & Performance Upgrades |
|---|---|---|
| Older Welded Box-Frame HV Motors | WEG HGF Cast Iron TEFC Series Superior Rigidity | Drastically reduced structural vibration, enhanced heat dissipation, higher impact resistance, and extended bearing life. |
| Standard-Efficiency HV Crusher Drives | WEG HGF High-Torque IE3 Series Energy & Torque Upgrade | Higher pull-up and breakdown torque capabilities to withstand heavy shock loads during crusher and mill startup. |
| Open Drip-Proof (IP23) Drives in Dusty Sites | WEG HGF IP55/IP56 Enclosed TEFC Dust & Moisture Seal | Prevents ingress of abrasive ore dust, slurry, and moisture, eliminating winding contamination and premature failure. |
Expert Technical Sourcing & Severe-Duty Plant Integration
The WEG HGF line stands out due to its monoblock FC-200 cast iron construction and optimized internal ventilation. Available with re-greasable ball or roller bearings, insulated non-drive end bearings for VFD variable speed operation, PT100 RTD sensors, and customizable terminal box orientations, the HGF series easily replaces aging high-voltage motors from legacy brands. Whether your facility requires direct-on-line 6.6 kV / 11 kV starting or medium-voltage inverter operation, our technical team provides full cross-referencing, dimension verification, and end-to-end logistics support.
Core Benchmark Model Standard Configurations
- HGF 315L/U 250kW 6.6kV
- HGF 355L/U 400kW 6.6kV
- HGF 400S/M 500kW 6.6kV
- HGF 400L/U 630kW 6.6kV
- HGF 450S/M 800kW 11kV
- HGF 500S/M 1250kW 11kV
- HGF 560S/M 2000kW 11kV
- HGF 630S/M 3150kW 11kV
- WEG HGF VFD Duty IC416
- WEG HGF Insulated Bearings
- WEG HGF Roller Bearings for Belt Drive
- WEG HGF Mining Duty IP65
