This VLT 6000 HVAC Drives series was built with HVAC systems in mind, covering power ratings from 1.
1 kW all the way up to 450 kW when running on 380-460V supply. The smaller 200-240V units handle up to 45 kW, while the 525-600V versions go up to 200 kW - giving plenty of options for different installation needs. The automatic energy optimizer (AEO) is the most useful feature. It can squeeze out an extra 5-10% in energy savings beyond what basic variable speed control provides. The system does this by adjusting the motor's magnetizing current based on actual load conditions, which stops energy from getting wasted as heat around the motor. Harmonic distortion stays around 40% thanks to the built-in DC link reactors. This matters because it means smaller cable requirements and better power quality overall. The drives also come with RFI filtering that meets EN55011 class A and 1B standards right out of the box, so there's no need to buy separate filters. Most units come in IP20 bookstyle enclosures that work well for cabinet mounting. The compact design lets them sit side-by-side without extra cooling gear. IP54 versions are available when the environment gets tougher. There's a sleep mode that automatically shuts down pumps or fans when they're running slow but not really doing much for system control - like when a pump is barely contributing to pressure or temperature regulation. Another handy feature is frequency bypass, which lets the drive skip up to four specific frequencies where resonance might cause noise or vibration problems in air handling equipment.
