400 HP Vertical AC Top Drive Motor

The Only Heavy Duty 400 HP Form Wound Motor Designed for Top Drives.

In severe conditions, random wound motor failures are caused by a combination of several destructive factors including high VFD voltage spikes, excessive top drive vibration, rain and contamination (weather conditions), random windings (weaker than form wound) and overheating.

That’s why we designed and built the first heavy duty form wound 400 horsepower top drive motor with a better designed and engineered optional cleaning motor blower.

Gulf Electroquip DRILLMAX motors satisfy a wide range of applications within the oilfield industry.  The GEQ DRILLMAX600 and GEQ DRILLMAX600 XL Top Drive Motor was developed to meet required specifications of the IEC 60034.1 standards.

We listened to drillers and built a 400 HP top drive motor that works better and lasts longer.

Ideal for oil and gas rig top drives.


  • New higher strength bearings and seals – double the systems
  • Upgraded power circuit
  • Cast aluminum rotor
  • Safer and faster connection
  • Eliminating terminal block
  • Copper buss tabs – ‘Bolt, Tape and Go’
  • Patented QUIETCLEAN blower (optional)
  • Form Wound, Kapton insulated windings
  • Interchangeable with existing motors


  • Form windings contribute to longer motor life and more reliable motor service
  • Increased installation, operator and maintenance safety / convenience
  • Longer motor life resulting in minimizing down time and lowering operating costs
  • Interchangeability with existing motors provides convenience and flexibility


  • Thermal Block
  • RTDs
  • Pinion
  • Brake Hub
  • Junction Box
  • Cable Connections Splice Kit
  • Special Options


  • Onshore Drilling Rigs (Top Drives)


  • Horsepower: 400 HP (298 kW)
  • Rated Voltage: 575 V
  • Rated Frequency: 39.2 Hz
  • Base Speed: 1155 RPM
  • Max Speed: 3750 RPM
  • Duty: (IEC) S1, Continuous | (IEC) S9, Intermittent
  • Current at Rated Load: 368 AMPS
  • Efficiency: 94%
  • Number of Poles: 4
  • Full Load Torque: 1818 FT|LBS (2465 Nm)
  • Intermittent Duty Torque: 3250 FT|LBS
  • Ambient Conditions: -40°C to +55°C with SCFM Cooling Air
  • Max. Altitude: 1 Km (3300 FT)
  • Upper Bearing: Four Point Contact Ball Bearing
  • Lower Bearing: Cylindrical Roller Bearing
  • Cooling: Separate Force Ventilation - 1100 SCFM
  • Weight: Approximately 2500 LBS
  • Available Connections: Buss Tab, Terminal Board, Flying Lead, Junction Box
  • Enclosure: IP44


  • Rated Output: 298 KW (400 HP)
  • Rated Voltage: 575V
  • Rated Frequency: 39.5 Hz
  • Weight: Approximately 2500 LBS

Performance Charts

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Compatible Products


Title Category
DRILLMAX400 Brochure
Product Brochure
DrillMax400 Cut Sheet