I agree to the terms of the site Privacy Policy

Variable Frequency Drive Triol AT24 line UE

Variable Frequency Drive AT24 line UE is a sustainable power frequency drive.

Distinctive feature of Triol AT24 VFD line UE is the implementation of film capacitors in the DC-link that provides a long service life and simplifies maintenance.

Triol AT24 VFD line UE is optionally equipped with a removable wireless control graphic terminal with induction supply. It is possible to control several VFDs.

Triol AT24 VFD line UE is designed to control pumps, HVAC systems, exhausters, compressors, conveyors, crushers, mixers, grinders, mills. Various additional units for VFD control system extend abilities of process control.

Setting up and controlling of Triol AT24 VFD line UE 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

Distinctive benefits of Variable Frequency Drive Triol AT24 line UE:

  • Investment savings
  • Cost saving
  • film capacitors
  • removable graphic terminal, operation without control terminal
  • built-in input fuses
  • built-in DC-link
  • vector sensor (close-loop) and sensorless (open-loop) control
  • 3 different types of encoders supported
  • auto-tuning of motor parameters with motor rotation and without it
  • motor group control
  • remote control terminal with transient graphs
  • settings via smartphone
  • service software
  • macros for quick start and the ability to exchange settings between VFDs
  • wide variety of expandable units for control system
Input voltage, V3х380 / 3х480/ 3×690 (-15 % …+10 %)
Input frequency, Hz50 / 60 (-5 %…+5 %)
Output current, A102 … 800
Output frequency, Hz0.5…400
Frequency resolution, Hz0.1
Acceleration / deceleration time, s1 …4000
Overcurrent characteristics150 % of rated value for 60 sec
Efficiency, %>97
Motor control
Control methodsV/f (volts-per-hertz) (5 reference point) sensorless vector control (open-loop) sensor vector control (close-loop)
PWM frequency, kHz2…10
Speed range1:100 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
BrakingBy frequency



Acceleration / deceleration typesS-curve, linear (3 reference points)
TerminalRemovable graphic terminal with induction power
Light alarm“Ready”; “Run”; “Control channel”, “Rotation”
Push buttons“Start”; “Stop”; “Fast access “
Control signals
Customer supply10 V DC, up to 30 mA 24 V DC, up to 150 mA
Number of discrete inputs9
Discrete inputs1 Dl Emergency Stop 8 Dl programmable
Discrete inputs type24 V
Sensor input1 PTC sensor (switching at a resistance of 3 kOhm / 1.8)
Number of relay outputs4
Relay outputs type250 V250 V, 3.5 A
Number of analog inputs2
Analog inputsProgrammable 0…10 V / 0…5 mA / 4…20 mA
Number of analog outputs1
Analog outputsProgrammable 0…10 V / 0…5 mA / 4…20 mA
Physical Interface2 wire RS-485 for Modbus
Communication protocolsModbus RTU
Frame transmission115200 bps by default 1200 -250000 bps
Data format8 bits, 1 stop bit, no parity
Number of addresses1…255 for Modbus
Supply protectionsPhase loss, phase sequence fault
Motor protectionsOvercurrent



Phase loss

Current unbalance

Encoder open circuit

Brake resistor open circuit

VFD protectionsOverload, Overheating, DC-link undervoltage, DC-link overvoltage, Power switch failure
InsulationGalvanic isolation between power and user circuits
Insulation resistance>1 MQ
Input fuses (characteristic gG)Built-in
Braking IGBT-chopperOption, built-in
Input EMC filter (C2)Option, built-in
Quick fuses (characteristic aR)Option, built-in
Optional equipment
Input line chokeOption, outdoor, by request
Input passive harmonic filterOption, outdoor, by request
Braking resistorsOption, outdoor, by request
Output sine filterOption, outdoor, by request
Output dV/dt filterOption, outdoor, by request
Cabinet materialSteel
CoolingForced air
Noise level, @ 1 m, dB(A)<75
InstallationWall mounting
Cable entryBottom
Operating conditions
Operating conditionsIndoor, 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, mup to 1000 m – rated power above 1000 m – with reduced power
  • Start /stop/reverse of motor with set acceleration and deceleration rates
  • Motor speed and torque control
  • 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
  • Energy and electricity meters
  • Encoders supported – incremental, absolute, sine/cosine
  • Accelerated passing of resonant frequencies (3 ranges)
  • Recording the last 32 reasons of failures