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Automatic transfer switches

Automatic transfer switches (ATS) are critical components of any emergency or standby power system. Transfer switches are reliable, rugged, versatile and compact assemblies for transferring essential loads and electrical distribution systems from one power source to another.

Need help understanding the fundamentals of ATS ?

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Go to Automatic transfer switch controllers and remote annunciators

Automatic transfer switch controllers and remote annunciators

Go to Bypass isolation contactor type automatic transfer switches

Bypass isolation contactor type automatic transfer switches

Go to Bypass isolation power frame type automatic transfer switches

Bypass isolation power frame type automatic transfer switches

Go to Contactor type automatic transfer switches

Contactor type automatic transfer switches

Go to Molded case type automatic transfer switches

Molded case type automatic transfer switches

Go to Power frame type automatic transfer switches

Power frame type automatic transfer switches

Go to Transfer Switch Monitor 900

Transfer Switch Monitor 900

What is WCR in a transfer switch?

A Withstand Closing Current Rating (WCR) represents a transfer switch's capability to ride out a fault condition until the overcurrent protection device clears the fault. View the video for more information.

Choosing a transfer switch

Learn more about contributing factors when choosing a transfer switch for a critical power application. View the video for more information.

NEC code change for an engine-generator remote start circuit

There has been a recent change to the 2017 edition of the National Electrical Code for an engine-generator remote start circuit in an emergency system.

Short-circuit WCRs

The Short-Circuit WCR is the UL 1008 test for a transfer switch’s ability to close into and withstand a fault current. These are the ratings which will actually appear on the UL label of the product.

Automatic transfer switches

Eaton’s ATS modernization helps major Midwestern U.S. medical center maintain always-on power.