Variable frequency drive (VFD) for speed control of three-phase motors, with single-phase or three-phase input depending on model. Quoted by power and application (pumps, fans, conveying).
Tell us the reference or key specification (current, power, gauge, size), quantity and city — a technical advisor sends your quote the same business day.
A variable frequency drive regulates three-phase motor speed by converting the fixed supply into a variable-voltage, variable-frequency output, with electrical safety per IEC 61800-5-1 and EMC per IEC 61800-3. It is quoted by power (HP/kW), supply voltage and load type (variable or constant torque).
The three-phase variable frequency drive controls the speed and torque of AC motors through power electronics, adjusting output frequency according to the application. At TECTUL it is quoted by power, input voltage, output voltage, load type and control method. The actual lot data includes single-phase or three-phase input depending on model and uses such as pumps, fans and conveying. Unlike a soft starter, the VFD does not only reduce starting shock: it also enables variable-speed operation, ramps, motor protection and reference signals. The technical family reference for adjustable-speed electrical power drive systems is IEC 61800, while panel design must coordinate protections, ventilation, grounding/earthing and electromagnetic compatibility.
We dispatch three-phase variable frequency drives to Bogotá, Medellín, Cali, Barranquilla and all of Colombia. Request a quote via WhatsApp with power, voltage and application.
| Variable | Proportionality | At 80 % speed |
|---|---|---|
| Flow | ∝ speed | 80 % |
| Pressure | ∝ speed² | 64 % |
| Power drawn | ∝ speed³ | 51 % |
The affinity laws of turbomachines explain the drive's energy savings on variable-torque loads: a 20 % speed reduction roughly halves power. Equipment safety is certified under IEC 61800-5-1 and emissions/immunity under IEC 61800-3.
It depends on power, voltage, single-phase or three-phase input, load type and accessories. TECTUL quotes via WhatsApp according to nameplate data and application.
The soft starter reduces stress during starting and stopping. The VFD controls speed during operation, adjusts frequency and enables broader control functions.
It is installed in a ventilated panel, with upstream protection, grounding/earthing, supply to the drive and direct output to the motor. Programming must be done by qualified personnel.
Yes. Pumps and fans are common applications because speed control helps adjust flow, pressure or airflow without mechanical throttling.
According to the actual lot data, there are models with single-phase or three-phase input. Power, line voltage and motor voltage must be confirmed.
Send a photo of the motor nameplate, available voltage, application, installation environment and whether you need local, remote or process-signal control.
Power falls with the cube of speed: running at 80 % speed draws about 51 % of rated power per the affinity laws, which is why drives pay for themselves in pumping and ventilation with variable demand.
Yes at low power: models exist with 220 V single-phase input and 220 V three-phase output for small motors; medium and larger drives take three-phase input at 220 or 440 V.
Updated: July 22, 2026
