Screw Chiller Commercial HVAC VFD Cabinet 70–750 A

Name: Screw Chiller Commercial HVAC VFD Cabinet 70–750 A
Brand: Yolico VFD

This onboard variable frequency drive (VFD) cabinet is built for screw-chiller compressors, rated 70–750 A on three-phase 380 V with standard and low-harmonic (THD ≤ 5%) versions. Air, liquid and liquid-air cooling, 110% continuous duty, and options for AFE harmonic modules and APF filters.

Power: 70–750 AVoltage: 380V 3PHControl: V/f (low-harmonic option)

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Screw-chiller VFD cabinet Technical Specifications
Drive capacity	Three-phase 380 V: 70–750 A
Function type	Standard; low-harmonic (THD ≤ 5%)
Overload capacity	110% continuous operation
Cooling	Air, liquid, liquid-air
Motor type	PM synchronous + asynchronous induction
Options	AFE harmonic module; APF active filter

Product Description

Screw chillers spend most of the year far below full load, which is exactly where VFD control pays. This cabinet mounts directly on the chiller and drives the screw compressor from 70 A up to 750 A on 380 V, cutting part-load energy dramatically while keeping oil management and capacity control stable.

Standard and low-harmonic versions are available (THD ≤ 5%), with air, liquid and liquid-air cooling to match the chiller's thermal design. It drives PM synchronous and asynchronous compressor motors at 110% continuous duty, and AFE active front-end modules or APF active filters can be added where supply harmonics are constrained. For high-speed direct-drive heads, the platform reaches 800–1000 kW per compressor head at up to 21000 RPM / 350 Hz, with cooling capacity to 1200 RT and energy savings of 35–40%.

Key Features

Onboard cabinet for screw-chiller compressors
70–750 A on three-phase 380 V
Standard or low-harmonic version (THD ≤ 5%)
Air, liquid and liquid-air cooling; 110% continuous duty
Options: AFE harmonic module, APF active filter

FAQ about Screw-chiller VFD cabinet

How much energy can VFD control save on a screw chiller?

On high-speed direct-drive heads the platform documents 35–40% energy savings with COP/IPLV up to 7.0/12.0 and cooling capacity to 1200 RT per head. Actual savings depend on your load profile — send a season of chiller logs and we estimate the saving for your building.

Can the cabinet be ordered in a low-harmonic version?

Yes. Choose the low-harmonic version with THD ≤ 5%, or add the AFE active front-end module or APF active filter as options where the network imposes strict distortion limits.