How to Choose the Right Automatic Transfer Switch: A Simple Guide
Have you ever been in the middle of something important when the power suddenly goes out? Whether you're running a business, working from home, or caring for loved ones—human or animal—a reliable backup power system is essential. And at the heart of that system is the Automatic Transfer Switch (ATS).
But not all ATS units are the same.
Choosing the wrong type could mean unnecessary downtime, damaged equipment, or even safety risks.
That's why we've put together this straightforward guide to help you understand your options and make a confident choice.
A Closer Look at Each Type
1. Open Transition ATS
This is the most economical choice. It works by briefly disconnecting from the main power before connecting to the generator. There's a short gap—usually just a few seconds—which is fine for lights, fridge, or heaters, but may restart delicate electronics.
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Good fit for: Residential use, small retail, workshops.
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Keep in mind: If you have devices that can't tolerate even a short power break, consider another option.
2. Closed Transition ATS
Also known as a “make-before-break” switch, this model ensures there's no break in power. It's designed for situations where every second counts.
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Good fit for: Healthcare facilities, server rooms, pet boarding, or any environment where continuity is critical.
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Why it's worth it: Prevents data loss, keeps environments safe, and avoids operational disruption.
3. Delayed Transition ATS
Ideal for locations where the power tends to flicker on and off frequently. Instead of switching to the generator immediately, it waits a set time (e.g., 10–30 seconds) to see if power restores.
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Good fit for: Rural areas, places near construction, or anywhere with unstable grids.
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Main benefit: Reduces wear on your generator and avoids unnecessary fuel consumption.
4. Soft Loading ATS
This type gently brings the generator online over a minute or two, which prevents power surges that can harm high-tech equipment.
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Good fit for: Offices with servers, laboratories, audiovisual systems, or advanced medical devices.
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Best feature: Extends the life of both your generator and your sensitive electronics.
How to Pick the Right ATS for You
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List Your Essentials
What absolutely must stay on during an outage? Calculate the total wattage needed to run those items. -
Decide on Your “Must-Haves”
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No gap in power? → Closed Transition
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Dealing with frequent flickers? → Delayed Transition
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Protecting computers or lab gear? → Soft Loading
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Just need basics covered? → Open Transition
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Plan Your Budget
Costs vary based on type and capacity. Remember: investing in the right ATS can prevent costly downtime or equipment damage. -
Work with a Professional
Proper installation is crucial for safety and performance. At RSCN Electric, we provide end-to-end service—from selection and wiring to testing and maintenance.
Final Thought
Your backup power system is only as good as its transfer switch. Whether you're safeguarding a home, a business, or a critical care facility, choosing the correct ATS ensures you stay powered through any outage—smoothly and safely.
Ready to find your perfect ATS?
Contact RSCN Electric today for a free, no-obligation assessment. We'll help you choose, install, and maintain the right system for complete peace of mind.