HGF – Cast Iron Frame

HGF Motors

The HGF line is differentiated by its high performance combined with low maintenance costs. This product line is ideal for operating in the toughest applications, which require increased strength and durability of motors.

The HGF motors are being designed according to the highest technological standards available in the market, using modern computer software for mechanical, electrical and thermal analysis evidenced by performing rigid tests and checks. The result of this innovative development is a flexible product, suitable to the requirements of international standards and fully aligned with world market trends. This states WEG commitment not only with customers but also with the environment, bringing global solutions more and more optimized for its products and processes.


Standard Features

  • Rated Output: 90 kW to 3150 kW;
  • Number of poles: 2, 4, 6, 8, 10 and 12;
  • Frame sizes: 315 to 630;
  • Frequency: 50 Hz;
  • Voltage: 380 to 6600 V;
  • Service factor: 1.00;
  • Insulation: Class F (DT 80K);
  • Degree of protection: IP55;
  • Mounting: B3;
  • Cooling Method: TEFC – IC411;
  • Encloure material: FC-200 cast iron;
  • Fan covers: FC-200 cast iron for frames up to 400 and steel for frames 450 and above;
  • Fans: Aluminum for frames up to 500 and steel constructed for frames 560 and above;
  • Terminal Box: FC-200 cast iron;
  • Accesories terminal box: FC-200 cast iron;
  • Thermal protections:
    • Windings: 3-wire PT-100, 2 per phase;
    • Bearings: 3-wire PT-100, 1 per bearing;
  • Bearings:
    • Grease lubricated ball bearings for frames up to 500;
    • Grease lubricated roller bearings for frames 560 (in 4, 6, 8, 10 and 12 pole);
    • Insulated non-drive end bearing for frames 400 and above;
  • Bearing seals:
    • For grease lubricated bearings: Labyrinth seal;
    • For oil lubricated bearings and sleeve bearings: Mechanical seal;
  • Vibration: Grade A;
  • Balancing: with half key;
  • Shaft locking device for bearings protection;
  • Nameplate: AISI 304 stanless steel (laser recorded);
  • Drain: Automatic plastic plug.

Optional Features

  • Suitable for VFD application;
  • Encoder Dynapar HS 35;
  • Degree of protection: IP55W or higher;
  • Mounting: Other mounting configurations, including vertical for high thrust applications;
  • Cooling method: TEBC – IC415;
  • Fans: FC-200 cast iron;
  • Surrounding mufler;
  • Drip cover for shaft down applications;
  • Terminal boxes: Steel welded terminal boxes;
  • Second terminal box: For “Y” connection with accessible neutral terminal;
  • Cable glands: Plastic, brass, or stainless steel threaded;
  • Thermal protection: Bimetallic thermal protection, Thermistors (PTC), or calibrated PT-100 for alarm or tripping, at windings or bearings;
  • Thermometer on bearings with gauge with/without contacts;
  • Bearings:
    • Oil lubricated bearings;
    • Sleeve bearings for all frame sizes;
    • Insulated non-drive end bearings for frames up to 355;
    • Insulated drive end bearings for VFD applications;
    • Insulating brush kit for drive end shaft for VFD applications
    • Bearings designed for vertical mounting for normal or high thrust applications;
  •  Vibration: Grade B;
  • Suitable for vibration detector SPM;
  • Balancing: Special balance levels;
  • Voltage surge protection: lightning arrestors and capacitors;
  • Stainless steel fixing srews;
  • Internal epoxy coating (tropicalization).

Other Features available under request

  • Voltage: 6900 to 11,000 V
  • Service Factor: 1.15 or 1.25;
  • Insulation class: F(DT 105K), H(DT 80K, 105K or 125K);
  • Independent hydraulic oil circulation system for sleeve bearings;
  • CT for differential and integral protection;
  • Power factor correction capacitors;
  • Signal tranducer;
  • Special shaft dimensions;
  • Tacogenerator;
  • Non-reverse ratchet;
  • Base: rail, sliding base, extended feet, rebuilt feet, anchorage plate.