Up to 4160 VAC, 10,000 HP

The Dura-Bilt5i MV series of medium-voltage AC-fed drives delivers reliable operation in a robust and compact design, providing a cost-effective solution for a broad range of applications. The Dura-Bilt5i MV delivers value through low cost of ownership and high reliability.


The versatile Dura-Bilt5i MV drive can be used in a wide variety of non-regenerative applications, including:

  • Fans and other high inertia variable torque loads
  • High starting torque loads such as cement kilns, extruders, and mixers
  • Conveyors
  • Pipeline and process compressors
  • Pumps of all sorts
  • Motor starting with synchronizing to the utility

The Dura-Bilt5i MV is a fully digital voltage source Pulse Width Modulated (PWM) Medium-Voltage (MV) drive with a compact and compartmentalized air-cooled design to optimize equipment segregation, cooling, and maintenance.

Power Levels & Motors

The DB5i is compatible with new or existing induction or synchronous motors from 200 to 10,000 HP, and from 2300 to 4160 volts.


  • Only front equipment access is needed, simplifying installation.
  • Innovative but proven heat-pipe cooling in larger frame sizes provides water-cooled performance with air-cooled simplicity, from 0 to 40 C, 50 C with derating.
  • An integral incoming fused disconnect can be included without increasing the footprint.
  • A cool-operating copper-wound drive isolation transformer is included within the compact enclosure. Multiple windings provide harmonic cancellation.

Power System and Motor Friendly

The drive AC to DC converter uses a 24-pulse diode rectifier, giving power-system-friendly operation that is better than IEEE 519 harmonic guidelines.

Interfaces and Controls

  • Uses the TMEIC family common control platform, including PP7 microprocessor, control I/O, and the TMEIC TMdrive-Navigator
  • The Dura-Bilt5i MV's advanced user interface, and system features provide fast startups, easy monitoring of operation, and close match of drive to application.

Series Designations

The Dura-Bilt5i MV product has a series designation appropriate for the outgoing motor voltage:

  • 2000 Series: 2000-2400 V ac, 200-3000 HP
  • 4000 Series: 4000-4200 V ac, 400-7000 HP
  • A dual bank drive for 4000 series provides up to 10,000 HP
Dura-Bilt5i MV Features and Benefits
Design Feature
Customer Benefit

Compact design

Smaller equipment rooms, easier layout

TMdrive-Navigator™ software configuration with tune-up wizards, trending, and simulator

Lower cost startups, ease of maintenance

Graphic keypad with drive control

No operator training required

Integral medium-voltage disconnect option

No added space needed up to 7.2 kV

Inverter power modules with medium-voltage IGBTs

Fewer devices for higher reliability

24-pulse AC-to-DC diode converter

Power-system-friendly, IEEE-519 compliant

Heat pipe air-cooled inverter in larger frame sizes

Extends IGBT life and saves space

Multi-level output voltage waveform


Sensorless vector control

Matches drive to process needs

Roll-out power modules

Fast repair and maintenance

Copper wound transformer included as standard

Cooler operation, small size

Transformer electrostatic shield and lightning arrestors included as standard

Reliability and power disturbance tolerance

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