How Does an Automatic Transfer Switch Work?
Automatic transfer switches (ATS) are essential components in commercial power systems. They switch between primary and backup power to ensure continuity and prevent unnecessary disruptions. Offering a seamless power transfer, these systems protect sensitive equipment and prevent business downtime. Understanding how these safety switches work can help you keep your power supply working smoothly during emergencies.
In this blog, the electrical experts at Salient provide a complete overview of how ATS units work. If your business requires an ATS, don’t hesitate to explore our available options or reach out to schedule a professional installation!
How Exactly Does an Automatic Transfer Switch Work?
The automatic transfer switch (ATS) continuously monitors your main power source. If the main power fails, the ATS signals the generator to start. The switch then transfers power from the main supply to the backup power source.
Once utility power is restored, the ATS switches back to the main power supply. The generator turns off after normal power is stabilized. Through this process, the automatic transfer switch ensures uninterrupted power and protects your electrical systems, preventing damage from power fluctuations and instability.
Types of Automatic Transfer Switches
Automatic transfer switches are ideal for several different industry applications, including industrial and residential settings, data centers, and more. There are several different types of ATSs available, such as:
- Open transition ATS: These switches have a brief delay between switching, minimizing electrical spikes.
- Closed transition ATS: With no power interruption, these systems are best for sensitive electrical equipment.
- Delayed transition ATS: This ATS provides a buffer to prevent damage to certain loads.
- Soft load ATS: Allowing parallel operation with your utility power, these units ensure uninterrupted power across devices.
The Importance of Using an Automatic Transfer Switch
Using an automatic transfer switch in conjunction with your generator is a great way to ensure safety by preventing backfeeding, which can harm utility workers and equipment. An ATS helps minimize downtime and protects critical electrical devices from power loss that can lead to lasting damage.
Additionally, ATS units offer optimal convenience, automatically switching to your backup power supply without the need for manual intervention. In many industries, an ATS is required to remain in compliance with safety and electrical regulations, especially in hospitals, data centers, commercial properties, and large homes.
How Many Automatic Transfer Switches Do You Need?
The number of automatic transfer switches necessary for your property depends on the size of your building, the number of backup power sources you have installed, and load segmentation (i.e., separating critical loads from non-essential loads). In residential settings, one ATS is usually sufficient to support a whole-home backup generator. For businesses, multiple ATS units may be required to support different systems or buildings.
Always Test Your Automatic Transfer Switches
Regularly testing your automatic transfer switch is important to ensure it’s reliable during emergencies. Monthly manual tests are recommended to verify switch operation; however, you’ll still need to schedule an annual professional inspection to check responses to real outages. Additionally, it’s important to test electrical components routinely for signs of excess wear and tear.
Signs your ATS may need repair or replacement include:
- Delayed or failed power transfer
- Frequent power fluctuations
- Burn marks or unusual odors
- Unresponsive controls or indicators
- Strange noises
- Failure to switch back to utility power
Request ATS Installation, Repair, or Maintenance with Salient
Whether you need an automatic transfer switch installed or have an existing unit that needs repair or replacement, Salient offers the solutions you need to ensure your backup power system works smoothly during an emergency.
Offering a wide variety of ATS options suitable for many different industries, we’re confident in our ability to equip your building with the systems it needs to remain connected to reliable power.
Schedule automatic transfer switch installation, repair, or maintenance by contacting our team online today!