Invertek Variable Speed Drives for Quarry Extraction Fans
Dust extraction is required in Australian quarry and mineral-processing operations. Extraction fans remove airborne dust from crushers, screens and transfer points. In fixed-speed systems, fans often use more energy than required during reduced production.
An Invertek variable speed drive (VSD) adjusts fan speed to match ventilation requirements. With pressure, airflow or PLC feedback, the VSD regulates duct pressure or airflow using PID control.
Learn more about Invertek Drives here.
Benefits of variable speed control
A VSD can provide:
- Lower energy use during reduced production.
- More stable duct pressure and airflow.
- Reduced starting current and mechanical stress.
- Better coordination between extraction and process demand.
- Lower mechanical wear on fan components.
Actual energy savings depend on the fan curve, duct resistance, operating profile, minimum airflow and control method. A VSD does not reduce energy consumption unless the control system is correctly configured.
Selecting the drive
Select the VSD using motor nameplate data and application duty. Confirm motor voltage, full-load current, power rating, overload requirement, speed range and acceleration requirements. Base selection on output current and duty, not motor kilowatts.
The motor must be suitable for VSD operation. At low speed, reduced cooling may require a minimum speed limit, derating or independent cooling.
The Optidrive P2 range is available for industrial motor-control applications up to 250 kW, subject to the model and voltage configuration. Invertek has also reported an Australian quarry installation using an Optidrive P2 to control a 200 kW extraction fan.
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Installation considerations
IP20 drives are installed inside electrical panels. IP55 or IP66 models may suit site-mounted applications. Selection must consider dust, moisture, ambient temperature, cooling and maintenance access.
The design should also address motor protection, minimum speed, interlocks, restart behaviour, emergency-stop arrangements, motor-cable installation and EMC. Installers must confirm any hazardous-area classification before selecting equipment.
Conclusion
Leveraging an appropriate Invertek VSD suited to the motor can greatly improve quarry extraction-fan control and reduce unnecessary full-speed operations, saving on wear and tear of the system. Installers should acknowledge that leveraging the appropriate VSD is part of a wider ventilation system, with complete fan, ductwork and control system.
If you need assistance finding the right VSD solution, ADM Systems can help identify a suitable drive for your application.
For any questions, send them directly via our contact page here or call the team directly on 1300 236 467.
ADM Systems is an Australian supplier and distributor of Invertek Drives, with offices and warehouse locations in Melbourne, Brisbane and Perth, shipping variable speed drives to anywhere in Australia.
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