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TRIOL AT24 line RT

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TRIOL AT24 line RT

Distinctive benefits

-20 ºC…+50 ºC

Operating temperature

IP55 (NEMA3R) / NEMA4/IP65


Removable graphic terminal

Induction supply or SRP controller


Input circuit breaker, DC-link and braking IGBT- chopper

Remote control terminal

transient graphs

About product

Complete cabinet solution for oil production

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.

Special algorithm for PCP

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.

Two versatile versions

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).


Input voltage, V 3х380 / 3х480/ 3×690 (-15 % …+10 %)
Input frequency, Hz 50 / 60 (-5 %…+5 %)
Output current, A 24 … 400
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 Options:

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 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
Number of analog inputs 2, open collector
Analog inputs Programmable 0…10 V / 0…5 mA / 4…20 mA
Number of analog outputs 1
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  Overload  Underload  Phase loss  Current unbalance  Encoder open circuit  Brake resistor open circuit
VFD protections Overload, Overheating, DC-link undervoltage, DC-link overvoltage, Power switch failure
Protections provided SRP controller Gearbox 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
Insulation Galvanic isolation between power and user circuits
Insulation resistance >1 MQ
Circuit breaker Built-in
DC-link Built-in
Braking IGBT- chopper Built-in
Braking resistors Built-in
Input EMC filter (C2) Option, built-in
Input passive harmonic filter Option, built-in
Enclosure IP54 (NEMA3R)
Cabinet material Steel
Cooling Forced air
Noise level, @ 1 m, dB(A) <75
Installation Floor mounting
Maintenance One-side
Cable entry Bottom
Operating conditions
Operating conditions Outdoor
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, m up 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