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Low-voltage equipment


Variable Frequency Drive Triol AT24 line SD

Variable Frequency Drive Triol AT24 line SD is a small cabinet VFD with the designed for various technological tasks performed in two versions:  with power range from 110 kW to 1.6 mW at 690 V with IP21 enclosure and dual-frequency drive from 110 kV to 800 kW at 380 V with IP54 metal case enclosure. The line implements unique Triol algorithms, including both sensor and sensorless vector control, master-slave modes, control of start parameters, braking through specialized service software.

Triol AT24 VFD is functionally able to connect up to 5 engines in the “cascade” or “auto-fan” mode.

Power supply, V3×380/ 3×480 (–15%…+10%)
Power frequency, Hz50/60 (–5%…+5%)
Power range, kW110 W 1.6 mW at 690 V,

110-800 kW at 380 V

Discretization change frequency setting, Hz0.1
Braking switchBuild-in (optional)
Cycle adjustmentPID
Remote optionP24E Control panel with induction washing, removable
Output frequency, Hz0-400
PWM frequency, kHz1.6-8

Default value: 5.5 kW to 55 kW – 5 kHz. 75 kW to 320 kW – 3.3 kHz. 400-kW lines – 2.5 kHz. Мore than 630 kW – 1.25 kHz


EnclosureIP21, IP54
Casing materialMetal (M11-M80)
Operating temperature, °C (°F)−40…+50 °C

(−40…122 °F)

Cooling typeAir, forced