Electrical Supplies
Variable speed drivers
Supplied by
About
- Schneider Altivar variable speed drives, ATV320 for machines and the ATV600 and ATV900 ranges for process and building services, converting the fixed supply frequency into a controlled voltage and frequency so an induction motor runs at any speed the process needs. Built-in PID control, motor protection and Modbus/BACnet communication let the drive follow a pressure or temperature setpoint directly from the BMS.
Application
The default control method for AHU fans, chilled water and domestic booster pumps, cooling tower fans and car park ventilation. Because fan and pump absorbed power varies with the cube of speed, trimming a fan from 100% to 80% roughly halves its energy use, which is why VSDs are usually the shortest-payback item in an HVAC energy retrofit. The trade-off is harmonics: drives inject current distortion, so on a large installation the THD assessment and any filtering belong in the design, not in commissioning.
Standards & Reference 6 cited
IEC 61800-2
Ratings and performance requirements for adjustable-speed drive systems: how a variable speed drive is rated and declared.
IEC 61800-3
Electromagnetic compatibility for drive systems: the emission and immunity limits that stop a drive interfering with everything else on the site.
IEC 61800-5-1
Electrical, thermal and energy safety requirements for drive systems: the safety half of the drive standards, alongside the EMC part.
IEC 60529
The IP code. Two digits stating how well an enclosure keeps out solid objects and water, IP65 and the like. The number a specifier reads first when equipment sits outdoors or in a plant room.
Also citedIEC 61800-9-2IEC 61000-3-12
Request for quotation
Get a price for this item
Send the quantity and the project. Our sales engineers reply with a quotation, usually within one working day.
More in this line
Soft starters & variable speed drivers
3 products
View All
