For use in lifting systems, we propose the Triol AT24-elevator – a special modification of the Triol AT24 variable frequency drive. The Triol AT24-lift has all the advantages of the Triol AT24 variable frequency drive, in addition to added special features:
 

• Linear and S-type rates of acceleration and deceleration;
• Controllable time of acceleration and deceleration, time range: from 0.5 to 1000 s;
• Elevating at increased speed (the drive determines the shaft load and speed excess in comparison with the rated one);
• 3 modes of braking via an electric motor: applying brake, frequency braking, and dynamic braking;
• Controlling and monitoring state of operability of elevator brakes;
• Controlling and monitoring state of operability of a motor contactor;
• Complex of measures to ensure the safety of passengers in emergency situations;
• Complex of measures to ensure the safety of equipment of an elevator and the drive;
• Evacuation mode: the drive operates by using one phase and AC 220 V only;
• Protection from failure of the reducer/multiplier and from winch cable breakage: by applying a brake and transferring emergency signal via relay output.