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TRIOL AT24 line UC

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TRIOL AT24 line UC

Distinctive benefits

Control type

Vector sensor (closed-loop) and sensorless (open-loop) control


3 different types of encoders supported

Motor parameters

auto-tuning of motor parameters with motor rotation and without it


Motor group control

Remote control terminal

Transient graphs

Quick settings

Settings via smartphone

About product

Increased control accuracy

Variable Frequency Drive Triol AT24 line UС is an intelligent frequency drive for operating processes with high overload ability. There are all the advantages of Triol unique vector control algorithm implemented in Triol AT24 VFD line UC. Connecting three different types of encoders provides increased control accuracy to operate in a closed-loop system.

Easy set up

Setting up and controlling of Triol AT24 VFD line UC is easy due to the use of: Wi-Fi adapter with step-by-step Triol Wizard via smartphone, Service software Triol Drive for PC, Remote control terminal with transient graphs


Input voltage, V 3х380 / 3х480/ 3×690 (-15 % …+10 %)
Input frequency, Hz 50 / 60 (-5 %…+5 %)


Output current, A 6.4 … 110
Output frequency, Hz 0.5…400
Frequency resolution, Hz 0.1
Acceleration / deceleration time, s 1 …4000
Overcurrent characteristics 150 % of rated value for 60 sec
Efficiency, % >97

Motor control

Control methods V/f (volts-per-hertz) (5 reference point) sensorless vector control (open-loop) sensor vector control (close-loop)
PWM frequency, kHz 2…10
Speed range 1:100 in open-loop system 1:1000 in closed-loop system
Speed accuracy (static) ±10% of motor nominal slip in open-loop system ±0.1 % of rated speed in close-loop system
Torque accuracy ±10% in open-loop system ± 5 % in close-loop system
Braking By frequency



Acceleration / deceleration types S-curve, linear (3 reference points)


Terminal Integrated seven-segment
Light alarm “Ready”; “Run”; “Control channel”, “Rotation”
Push buttons “Start”; “Stop”; “Fast access “

Control signals

Customer supply 10 V DC, up to 30 mA 24 V DC, up to 150 mA
Number of discrete inputs 8
Discrete inputs Programmable
Discrete inputs type 24 V
Number of relay outputs 4
Relay outputs type 250 V, 1 A
Discrete output 2 open collector
Number of analog inputs 2
Analog inputs Programmable 0…10 V / 0…5 mA / 4…20 mA
Number of analog outputs 2
Analog outputs Programmable 0…10 V / 0…5 mA / 4…20 mA


Physical Interface 2 wire RS-485 for Modbus
Communication protocols Modbus RTU
Frame transmission 115200 bps by default 1200 -250000 bps
Data format 8 bits, 1 stop bit, no parity
Number of addresses 1…255 for Modbus
Access Slave


Supply protections Phase loss, phase sequence fault
Motor protections Overcurrent



Phase loss

Current unbalance

Encoder open circuit

Brake resistor open circuit

VFD protections Overload, Overheating, DC-link undervoltage, DC-link overvoltage, Power switch failure
Insulation Galvanic isolation between power and user circuits
Insulation resistance >1 MQ


Braking IGBT-chopper Up to 15 kw: built-in From 18 kW: option, built-in
Wi-Fi adapter Option, built-in

Optional equipment

Input line choke Option, outdoor, by request
Input passive harmonic filter Option, outdoor, by request
Braking resistors Option, outdoor, by request
Output sine filter Option, outdoor, by request
Output dV/dt filter Option, outdoor, by request


Protection degree of Enclosure IP21
Cabinet material Up to 7.5 kw: plastic From 11 kW: steel
Cooling Forced air
Noise level, @ 1 m, dB(A) <75
Installation Wall mounting
Maintenance One-side
Cable entry Bottom

Operating conditions

Operating conditions Indoor, no caustic and volatile air, no dust
Operating temperature -10…+40 °C (-10…+104 F)
Storage temperature -40…+50 °C (-40…+122 F)
Relative humidity, % from 5 to 90 non condensing
Altitude, m up to 1000 m – rated power above 1000 m – with reduced power


  • Start / stop / reverse of motor with set acceleration and deceleration rates
  • Auto-tuning of motor parameters (with rotation and without)
  • PID-controller
  • 2-wire control
  • 3-wire control
  • Automatic restart
  • “Catch on the fly” mode
  • Motor group control
  • Operation by calendar
  • Encoders supported – incremental, absolute, sine/cosine
  • Accelerated passing of resonant frequencies (3 ranges)
  • Recording the last 32 reasons of failures