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variable frequency drive Triol AT27

Triol AT27

Industrial Medium Voltage Variable Frequency Drive

Versatile and reliable solution for general industrial applications

Medium-voltage Variable Frequency Drives Triol AT27 are designed for automatic control of a wide range of industrial systems with induction, synchronous (with an external exciting system) and Permanent Magnet Motors.

Wide power range

Variable Frequency Drives Triol AT27 have extensive motor control functionality and covers a large power range to operate with pumps, fans, compressors, mills, crushers, conveyors, extruders, mixers, etc.

High-quality solution for efficient work in various industries

Variable Frequency Drive Triol AT27 offers wide sets of functions and unique algorithms for high-quality control of motors. Implementation of Variable Frequency Drive Triol AT27 provides increased reliability of equipment operation, reduced productivity and energy savings. Innovative technical solutions in the field of transformer design, cooling systems and intelligent algorithms development guarantee a non-stop operation of equipment minimizing the costs.

Ergonomic design, high reliability

Triol AT27 VFD is an adaptive solution compatible with any environmental conditions and the best option that ensures a long-term operation.

Robust VFD that is persistent to ice, rain, and snow

AT27 series is represented by 3 lines, each of which was created for different climatic conditions: from comfortable conditions of electrical rooms to extreme conditions of hot deserts and Arctic colds, for maritime climate and installing in metallurgical plants.

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  • certif triol
    ISO 9001:2015
  • certif triol
    EN 61140

Distinctive benefits

Investment Savings

No construction and ventilation system required

No additional power transformers needed

Operation with any motor

IEEE 519 compliance

One VFD covers control process for several motor and programmable logic controller (PLC)

Small footprint

Energy and resource savings

Reduced energy consumption

Process optimization

Maximization of production

Voltage sags protection

No shutdowns due to Triol AT27 VFD failure

Automatic restart

Quick replacemen

Unlimited motor start

Unloading time savings (mills, mixers, extruders)

Completing the plan

System redundancy

Reduced installation and operating costs

Low cost with an extended lifetime

Easy setup and monitoring

Increased motor overhaul cycles and processing equipment

Minimum installation work

Standard shipping

No need for a large storage room

Meduim-voltage multi-level VFDs operation

Triol phone adapter

All Triol AT27 series VFDs are equipped with a Wi-Fi adapter which allows you to configure and commission the drive using just a smartphone. Using Triol AT27 Wizard app enables you to set up the drive in 20 easy clicks.


Key Features

Line ED


  • Cabinet type
  • Enclosure protection class is IP31
  • Operating temperature –1…+40°C (33.8…104°F)
  • Common industrial application (pumps, fans, exhausters, compressors, mills, conveyors, extruders)

Line RX


  • Block-box type
  • Enclosure protection class is IP43
  • Operating temperature –60…+40°C (–76…104°F)
  • Common industrial application (pumps, fans, exhausters, compressors, mills, conveyors, extruders)
Line MV

Might of Voltage

  • Cabinet type
  • Enclosure protection class is IP65 with a dual-circuit cooling system
  • Operating temperature –10…+60°C or –60…+40°C (14…140°F or –76…104°F)
  • Common industrial application (pumps, fans, exhausters, compressors, mills, conveyors, extruders

  • A method of a magnetic circuit manufacturing. Application for invention 2018105859 of 02/16/2018 – based on this invention, our company develops and manufactures transformers of TRSD series used in Triol AT27 VFDs.
  • High-speed switching device. Application for invention 2018101494 dated 1/16/2018 – this invention underlies the mechanical bypass of the power cells and ensures the smooth operation of the AT27 in the most demanding applications in the event of a failure of the inverter part of the power cell.
  • Device and method of high voltage measuring. Application for the invention №2018122866 from 06/23/2018 – the device for high voltage measuring, invented by the company, made it possible to abandon large and heavy voltage transformers and, accordingly, reduced the size of our VFDs.