What is the normal motor voltage for a screw compressor?

The normal motor voltage for a screw compressor is commonly 480 VAC, which is a standard voltage level used in industrial applications, especially in North America. This voltage level is preferred due to its balance between efficiency and the capacity to handle high loads in large machinery. Screw compressors are designed for robust use in industrial refrigeration systems, where 480 VAC motors can deliver the necessary power without significant losses.

This voltage supports a three-phase power supply, which is crucial for the operational stability of heavy-duty motors like those found in screw compressors. The design and efficiency of the motor at this voltage make it suitable for maintaining optimal performance in cooling and refrigeration processes.

The other options listed do not typically provide the same level of efficiency and load capacity required for larger industrial applications, which is why they are less commonly used for screw compressors. For instance, while 220 VAC might be appropriate for smaller equipment, it does not offer the same robustness as 480 VAC in industrial settings. Similarly, 380 VAC is more prevalent in some international locations, but it is not as widespread in North America’s industrial sector. Lastly, 600 VAC is typically used for specific high-voltage applications but is not the standard for screw compressors, which typically operate effectively under the 480 VAC standard