I agree to the terms of the site Privacy Policy

Variable Frequency Drive Triol AT24 line RT

Variable Frequency Drive Triol AT24 line RT is a premium solution for submersible and surface oil production pumps (including SRP and PCP) with metal housing with the possibility to install additional options inside the cabinet.

Triol AT24 VFD line RT is a complete cabinet for placing the main and additional functionality in one place and is a universal drive that controls both SRP and PCP, while it is also used for other types of industrial equipment, such as HVAC systems, fans, compressors, etc.

Triol AT24 VFD line RT and line SR are identical in functionality, but line RT is more versatile due to special algorithm for PCP:

implementation of kinetic buffering algorithm that allows the drive to remain in operation during short-term (up to 0.5 sec) power supply failure and “catch on fly” mode for induction motor with the turbine rotation output.

It is possible to optionally install input and output filters inside Triol AT24 VFD line RT cabinet.

Triol AT24 VFD line RT is available in two versions: with a removable wireless control graphic terminal with induction supply or with an intelligent well controller with a 3” touch screen (optional – 7” touch screen).

Distinctive benefits of Variable Frequency Drive Triol AT24 line RT:

  • Investment savings
  • Cost saving
  • Motors lifetime extension
  • Minimized maintenance
  • IP55 (NEMA3R) / optional NEMA4/IP65
  • operating temperature -20 ºC…+50 ºC (-20…+122 F) floor mounting
  • removable graphic terminal with induction supply or SRP controller
  • built-in input circuit breaker
  • built-in DC-link
  • built-in braking IGBT- chopper
  • placing additional options inside the cabinet
  • three-phase socket (optional)
  • remote control terminal with transient graphs
  • settings via smartphone
  • service software
Input voltage, V3х380 / 3х480/ 3×690 (-15 % …+10 %)
Input frequency, Hz50 / 60 (-5 %…+5 %)
Output current, A24 … 400
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)

Removable graphic terminal with induction power / SRP controller with 3.5” or 7″ touchscreen

Light alarm“Ready”; “Run”;” Fault”, “Control channel”
Push buttons“Start”; “Stop”; “Program”, navigation keys
Control signals
Customer supply10 V DC, up to 30 mA 24 V DC, up to 150 mA
Number of discrete inputs8
Discrete inputsprogrammable
Discrete inputs type24 V
Number of relay outputs4
Relay outputs type250 V, 1 A
Number of analog inputs2, open collector
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  Overload  Underload  Phase loss  Current unbalance  Encoder open circuit  Brake resistor open circuit
VFD protectionsOverload, Overheating, DC-link undervoltage, DC-link overvoltage, Power switch failure
Protections provided SRP controllerGearbox torque limit;  Limiting the effects of gas;  Limiting the minimum load on the bar;  Limit the maximum load on the bar;  Restriction of the minimum and maximum filling of the pump
InsulationGalvanic isolation between power and user circuits
Insulation resistance>1 MQ
Circuit breakerBuilt-in
Braking IGBT- chopperBuilt-in
Braking resistorsBuilt-in
Input EMC filter (C2)Option, built-in
Input passive harmonic filterOption, built-in
EnclosureIP54 (NEMA3R)
Cabinet materialSteel
CoolingForced air
Noise level, @ 1 m, dB(A)<75
InstallationFloor mounting
Cable entryBottom
Operating conditions
Operating conditionsOutdoor
Operating temperature-20…+50 °C (-4…+122 F)
Storage temperature-40…+60 °C (-40…+140 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
  • Automatic restart
  • “Catch on the fly” mode
  • Kinetic buffering
  • 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