Variable Frequency Drive Triol AT27 line ED

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.

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

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 allows carrying out diagnostics and setting of AT27 line ED for a quick start in 20 simple clicks.

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

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

Features Specifications Options

Operating temperature maximum range -10 ºС…+50 ºС
Enclosure NEMA2 (IP31)
Color touchpad 7”
Wi-Fi Wizard
Induction and Permanent Magnet motor
Output voltage and current sinusoidal
High power factor ≥ 0.96
Operating in unstable mains

Input
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, Hz	50 / 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 factor	0.96
THDi (input current), %	< 5
Pulses of rectifier	18; 24; 30; 36; 48; 54 (depends on the number of cells in each phase)
Overvoltage protection	Surge arresters
Output
Rated output voltage, kV	3.3; 4.16, 6; 6,6; 10; 11
Output frequency, Hz	from 0.5 up to 120
Frequency resolution, Hz	0.01
Output current, A	25…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

Options	Description
Copper transformer	Copper 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 cells	Bypass 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 cells	Bypass of each power cell of the drive made on the basis of IGBT transistors
Additional power cell in each phase	For 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 degree	Enclosure IP42
Increased operating temperature	Maximum operating temperature up to +50 °С
Top cable entry	Organization of terminals for entry power and signal cables on top of AT27 VFD
Heating system	Build-in option. Minimum operating temperature from minus 10 °С
Redundant cooling fans	Additional cooling fans with a check valve system to ensure AT27 operation with rated power if one of them fails
Additional PCB coverage	Coating of printed circuit boards with a special varnish to protect against aggressive impurities in the air
Electromagnetic door lock	Electromagnetic locks on the doors of the AT27 power compartments provide protection against opening doors when medium voltage is applied
Profibus communication protocol	Convertor Modbus-Profibus
CB27 Switch Cabinets	External cabinets. Allow you to implement the required one-line diagram
Reactors for transfer of the motor to mains	External cabinet. Designed to provide synchronous and shockless transfer of the motor to mains.
Sine-filter	External cabinet. Designed to improve the output current and voltage THD, as well as reduce the value of the parameter dV/dt.