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Triol AT27 Energy Drive

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Triol AT27 ED

Distinctive benefits

-10 ºС…+50 ºС

Operating temperature maximum range

NEMA2 (IP31)



Color touchpad

≥ 0.96

High power factor

Induction and Permanent Magnet motor

Output voltage and current sinusoidal

Wi-Fi Wizard

Operating in unstable mains

About product

Wide range of industrial applications

Medium-voltage Variable Frequency Drive Triol AT27 line ED is a reliable and ergonomic solution for a wide range of industrial applications. The versatility and compactness of AT27 ED enclosures make it easy to integrate them into the process.

Minimal maintenance requirements

Ergonomic design, high reliability, and minimal maintenance requirements make AT27 ED easy and convenient to use.

Increased efficiency

Control of the fans rotation speed depending on transformer and power cells temperature significantly increases the efficiency and reduces noise level in the electrical room.

Integrated Wi-Fi module

Integrated Wi-Fi module allows carrying out diagnostics and setting of AT27 line ED for a quick start in 20 simple clicks.

Complete safety

Easily removable air filters allow cleaning without stopping AT27 ED in complete safety for maintenance personnel.

Wide range of options

A wide range of options significantly expands the possibilities for application and increase reliability.



Input voltage, kV

3; 3.3; 4.16; 6; 6.3; 6.6; 10; 11 (-15 % ...+10 %)

-45% continuous with power limit

-100% not less than 100 ms with controlled generator mode of the motor

Input frequency, Hz50 / 60 (-10 %...+10 %)
Power, kW

3 / 3.3 kV

4.16 kV

6 / 6.3 / 6.6 kV

10 / 11 kV

from 160 kW up to 3000 kW

from 160 kW up to 3500 kW

from 200 kW up to 5000 kW

from 320 kW up to 8000 kW

Power factor0.96
THDi (input current), %< 5
Pulses of rectifier

18; 24; 30; 36; 48; 54

(depends on the number of cells in each phase)

Overvoltage protectionSurge arresters


Rated output voltage, kV3.3; 4.16, 6; 6,6; 10; 11
Output frequency, Hzfrom 0.5 up to 120
Frequency resolution, Hz0.01
Output current, A25…600
Overcurrent characteristics

120 % of rated value for 120 sec

150 % of rated value for 3 sec

THDi (output current), %< 2
THDu (output voltage), %< 5
dV/dt value< 1000 V/μs
Efficiency, %≥ 97


Copper transformerCopper bus is the material used for transformer windings. Transformer parameters and efficiency are commensurable with the basic type of transformer with windings of aluminum busbars
Mechanical bypass of power cellsBypass of each power cell of the drive is made on the basis of a vacuum chamber, with a response time of not more than 4 msec
IGBT bypass of power cellsBypass of each power cell of the drive made on the basis of IGBT transistors
Additional power cell in each phaseFor compensating voltage drop on the output sine-filter or reactors (if available) and the long cable line, as well as to ensure operation in the nominal mode in the case of bypassing the cells (with this option)
Increased protection degreeEnclosure IP42
Increased operating temperatureMaximum operating temperature up to +50 °С
Top cable entryOrganization of terminals for entry power and signal cables on top of AT27 VFD
Heating systemBuild-in option. Minimum operating temperature from minus 10 °С
Redundant cooling fansAdditional cooling fans with a check valve system to ensure AT27 operation with rated power if one of them fails
Additional PCB coverageCoating of printed circuit boards with a special varnish to protect against aggressive impurities in the air
Electromagnetic door lockElectromagnetic locks on the doors of the AT27 power compartments provide protection against opening doors when medium voltage is applied
Profibus communication protocolConvertor Modbus-Profibus
CB27 Switch CabinetsExternal cabinets. Allow you to implement the required one-line diagram
Reactors for transfer of the motor to mainsExternal cabinet. Designed to provide synchronous and shockless transfer of the motor to mains.
Sine-filterExternal cabinet. Designed to improve the output current and voltage THD, as well as reduce the value of the parameter dV/dt.