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Variable Speed Drive Triol AK06

Variable Speed Drive (VSD) AK06 series is designed to control and protect electric submersible and surface pumps with induction and permanent magnet motors. Triol AK06 VSD solution combines unique technical characteristics, the highest operating qualities, and excellent reliability.

Triol AK06 VSD is represented by 6 lines, each of which was created for definite segment of the global oil production industry. The lines differ from each other in the cabinet enclosure type and the power requirements at the VSD input. Variable Speed Drives AK06 series is the optimal solution to a wide range of operational tasks, significantly save the time of service engineers.

The dedicated special algorithms of VSDs operational system strengthen resources of oil production Companies and contribute to the growth of oil industry. Triol AK06 VSDs correspond to virtually any task of ESP technology and help oil and oilfield service companies receive the maximum benefit.

The products of the series operate in the following climatic conditions:

  • Arctic
  • Tropical
  • Desert
  • Maritime (including offshore platforms)





Maximization of Production


  • Voltage Sags protection
  • “Catch on the fly” mode
  • Gas lock algorithm

Commissioning is a snap

  • Automatic Well Commissioning
  • Pre-emergency state detection
  • Soft-start
  • User-friendly interface


  • Voltage Optimization Mode
  • Modes of automatic start 
  • Triol Vector Control Mode

Investment Savings

  • More than 100 models in 6 lines
  • Universal solution for Induction and Permanent Magnet Motors
  • Wide range of protocols to interface with any digital network

ESP run life extensions


  • Current optimization mode
  • Backspin control and protection
  • Built-in insulation monitoring system


  • Operation on the assigned time program with separately programmable times of ESP on and off state
  • Smooth acceleration and deceleration of ESP at a given rate
  • On and off motor settings
  • Reversing the motor
  • Motor start modes including:
    • Start with buildup
    • Inching start (can be used to uncouple the submersible unit)
    • Smooth start with synchronization
    • Wedging occurs to ensure maximum motor torque at low speed
    • Operation of the motor in a field weakening mode when rotational speed is higher than nominal (only for induction motors)
  • Operation of the electric motor in the following modes:
    • “Manual” (without the possibility of automatic ESP re-activation after the protection trips)
    • “Automatic” (with the possibility of automatic ESP re-activation)
    • “Automatic” (in accordance with the specified time program)
    • Automatic change of the output frequency according to the specified time program
    • Automatic start of the electric motor with an adjustable time delay when energizing the supply voltage
    • Current optimization mode when the specified motor speed is reached

Motor switch off:

  • at underload (protection against supply disruption)
  • in case the door of the power compartment of the cabinet is open
  • at an unacceptable pressure in the pipeline (according to the signals of the contact pressure gauge)
  • when the specified parameters of the downhole measuring system are exceeded
  • in case of power modules overheating
  • in case of deviation of the mains power supply voltage (if this deviation leads to an unacceptable current overload with the possibility of reclosing after voltage recovery)
  • for overcurrent protection
  • when the protection of the VSD power tongs is triggered
  • at overload (in accordance with the programmable ampere – second characteristic)
  • at an unacceptable reduction in the insulation resistance of Cable-ESP system
  • due to the unacceptably low output frequency of the electric drive
  • System and method of forced air cooling of an electrical device; priority date 08/28/2017
  • Cooling method of power semiconductor devices; priority date 09/20/2017
  • Method of protection against electric shock; priority date 11/20/2017
  • Variable Speed Drive device with a passive filter of split design; priority date 05/20/2018
  • Active power filter; priority date 05/22/2018
  • The plate heat exchanger of electrical device; priority date 05/22/2018
  • Dust and moisture removal device for electrical equipment; priority date 05/22/2018
  • Universal microprocessor controller; priority date 05/23/2018
  • Variable Speed Drive cabinet with an active filter-compensating device; priority date 06/22/2018
  • Cooling device for a variable speed drive cabinet; priority date 06/22/2018
  • Modular high-voltage device; priority date 06/23/2018
  • Quick-detachable power cells; priority date 08/08/2018
  • Variable Speed Drive; priority date 12/11/2018
  • Increased level of overvoltage protection
  • Additional power supply for external equipment
  • Expansion modules for connecting peripheral devices
  • Electricity monitoring system
  • Various digital interfaces for communication with remote control systems
  • External capacitor battery modules for operation in conditions of complete interruption of the supply voltage





UDNEMA4, NEMA4X, -20°С …+60°С; 6/12/18/24 pulse

Universal Drive


CPNEMA4, NEMA4X, -20°С …+60°С; PHF (passive harmonic filter), 6/12 pulse

Clean Power


PSNEMA4, NEMA4X, -20°С …+60°С; PSA (phase-shifting autotransformer)

Phase Shifting


RDNEMA3R, -20°С …+50°С; 6/12 pulse

Right Drive

5LHNEMA3R, -20°С …+50°С; PHF (passive harmonic filter)

Low Harmonic

6FCNEMA4 Cabinet -20°С …+55°С, with sine wave filter (standard) and passive harmonic filter (on request)

Flexible Cabinet