Reduced Voltage Starting Could Reduce Demand on Your Power System: Here's How

Reduced voltage starting has become a well-known subject among industry experts for reducing current demand, but it can be less than intuitive for new consumers. 

Let's break down the potential beneifts of this process, the science behind it, and see if it fits within your application. 

What is Reduced Voltage Starting?

There are multiple methods for reduced voltage starting, but all carry roughly the same purpose: to conserve energy as a method of decreasing peak demand on a system. 

With rotary screw compressors, this is typically achieved by starting the motor wired in a WYE connection — one where phase loads are connected at a single, neutral point — and later switching to a Delta Run connection. Speaking more basically, this allows a tool to gradually apply voltage and control the electrical load of a startup rather than flipping a switch and bringing it to full power. 

In areas where utility power is limited or especially burdened, this system can reduce brown outs and severe voltage drops when a motor is started. This method is far from new and more widely used in European countries and can be mandatory on some large motors. 

How can I identify the correct tool?

This feature is standard on all our or "E" series machines listed on the Compressor World website and a number of other rotary screw air compressors. Remember that when buying any electrical machine assembled for use in the United States, the electrical system must be UL, not just the components. 

If a tool is approved, you should expect to see a "UL" sticker on the electrical cabinet door. 

Still have questions?

Please contact our team of air compressor experts by calling 866-778-6572 or sending an email to info@compressorworld.com