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The Different Types of Automatic Transfer Switches

The Different Types of Automatic Transfer Switches

When people think about backup power energy, they often envision a robust generator that continuously creates electrical currents to keep equipment in operation. While this belief isn’t necessarily wrong, many people don’t realize that units are the only piece of equipment they’ll need to create a dependable energy system.

An automatic transfer switch (ATS) is a device that acts as a hub between the utility and secondary power. In the event of a power interruption, an ATS can redirect to a secondary power source, controlling the system on its own.

In this article, you’ll discover the different types of automatic transfer switches and how they integrate into a gen set.


Utility-to-utility transfer switches are valuable in situations where facilities have multiple utility service connections. You’ll notice these transfer switches more often when consumers within a location require frequent energy changes from one service to another application.

For example, commercial buildings with a single electrical system and two electrical meters may require utility-to-utility transfer switches to redirect power to buildings as tenants need electricity.


These types of transfer switches are best in locations that own various on-site gen sets. Depending on the location’s needs, a facility may activate and deactivate different generators at any given time. To paint a clearer picture, let’s take a look at the possible energy consumption rate in a mine.

A mine could have varied energy needs depending on which shafts are active. Operators may activate and deactivate power sources to accommodate areas that need ventilation.


When it comes to utility-to-generator transfer switches, many businesses and government services will rely on backup generators for supplemental energy. However, in some applications, these facilities may need to cater to specific requirements to support the power unit and transfer switch.

Generators and automatic transfer switches rely on each other as parts of an adequate and efficient power system. It helps to know the different types of automatic transfer switches and be aware of their many applications and how to safely implement one into your gen set.

To get started constructing your backup energy system, consider making a stop at Turnkey Industries. We buy and sell diesel generators of different voltages for commercial and industrial use! Please contact us through our webpage; one of our experts will be glad to assist you.

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