What voltage is supplied to the motor of the screw compressor?

The majority of industrial refrigeration systems, especially those utilizing screw compressors, typically operate on higher voltage levels for efficiency and performance. In this case, 480 VAC (volts alternating current) is commonly used to power the motors of screw compressors.

Using a voltage level of 480 VAC is advantageous as it allows for the reduction of current drawn by the motor compared to lower voltages, which contributes to less energy loss due to resistance in the wiring. Additionally, at 480 VAC, the motors can be more compactly designed because they can deliver the required horsepower without drawing excessive amps. This higher voltage also facilitates the use of longer wire runs without significant voltage drop, which is often necessary in large industrial setups.

In contrast, lower voltage options such as 240 VAC, 120 VAC, and even 600 VAC do not have the same widespread application for larger screw compressor motors in industrial settings. Specifically, 120 VAC is generally suited for smaller motors and light applications, while 240 VAC, while used in some contexts, is not as common for larger compressors that require significant power. Meanwhile, 600 VAC is less common in refrigeration applications and is typically designated for specific types of electric motors or equipment.

Thus, 480 VAC is the standard voltage