A brief power interruption in an office building is an inconvenience. The same interruption in a manufacturing facility is a different category of event. A PLC that reboots unexpectedly during a production run may require hours of recovery time to re-establish machine states, recalibrate tooling, and inspect or discard in-process material. A SCADA system that loses power mid-shift may corrupt the data it was collecting and require manual verification of process conditions before the line can restart. In a plant running 24 hours a day, even a few minutes of unplanned downtime carries real costs.
Manufacturing facilities in Georgia represent a significant and growing portion of the state's economy. From automotive assembly and supplier operations in the metro Atlanta corridor and West Point to aerospace and defense manufacturing in Savannah, carpet and flooring production in Dalton, and food processing and logistics facilities across the state, Georgia's manufacturing base is diverse, geographically distributed, and increasingly dependent on electronic controls that require clean, uninterrupted power.
What follows covers the specific power protection challenges in manufacturing environments, how to match UPS topology and capacity to industrial loads, and what to consider when protecting PLCs, VFDs, and other sensitive controls in a plant environment.
Why Manufacturing Facilities Have Unusual Power Needs
The power environment inside a manufacturing facility is different from any other commercial setting. Most of the factors that complicate power protection in offices, such as neighboring loads and utility-side events, also apply in manufacturing. But manufacturing facilities add a layer of internal power quality challenges that make the problem more complex.
Large Motor Starts Create Voltage Sags
Every time a large motor starts, it draws several times its running current for a brief period while it accelerates to operating speed. This inrush current creates a voltage sag on the electrical distribution feeding that motor. In a plant where large motors start and stop frequently, such as compressors, conveyor drives, pumps, and fans, those sags are a regular occurrence.
For most of the plant's heavy electrical loads, brief voltage sags are not a problem. For PLCs, HMIs, and other electronic controls sharing the same distribution, even a sag that lasts a few cycles can be enough to trigger a fault or reset. The controls were never designed for the power environment they are operating in.
VFDs Are Both a Source of Problems and a Sensitive Load
Variable frequency drives are nearly ubiquitous in modern manufacturing. They control conveyor speeds, compressor output, fan airflow, and dozens of other processes where variable speed is more efficient or necessary than running at fixed speed. VFDs are also significant sources of harmonic distortion. A plant with many VFDs will have measurably elevated Total Harmonic Distortion (THD) on its electrical distribution, which stresses power supplies and transformers throughout the facility.
At the same time, VFDs themselves are sensitive to the power quality problems they help create. A VFD that loses its DC bus voltage during a sag event will fault and drop the driven motor. Depending on the process, a VFD fault can mean a conveyor stopping with product in transit, a cooling system going offline, or a process parameter drifting out of specification.
Harsh Environments Challenge UPS Equipment
UPS systems in manufacturing environments face operating conditions that are outside the range most equipment is rated for. Elevated temperatures, airborne particulates from machining or finishing processes, mechanical vibration, and restricted installation space all affect UPS performance and reliability.
VRLA batteries are particularly sensitive to temperature. Every 15 degrees above the rated 77 degrees Fahrenheit (25 degrees Celsius) roughly halves battery service life. A UPS sitting in a hot machine room running at 95 degrees Fahrenheit will need its batteries replaced in half the time you planned. UPS systems in manufacturing environments need to be specified and located with the actual ambient conditions in mind.
What to Protect in a Manufacturing Facility
Not everything in a plant needs UPS protection. The cost of protecting every circuit would be prohibitive, and most heavy manufacturing equipment is not appropriate for UPS protection anyway. The goal is to identify the loads where a power interruption causes disproportionate damage and protect those specifically.
PLCs and Control Panels
Programmable logic controllers are the brain of a production line. A PLC reboot mid-cycle does not just stop the line. It may leave actuators in undefined states, require manual inspection of the work in progress, trigger alarm conditions that require acknowledgment before restart, and in some cases require a full re-initialization of the control sequence. For lines running complex sequences, recovery from an unplanned PLC reboot can take fifteen minutes to several hours depending on the process.
PLC protection is the highest-priority UPS application in most manufacturing facilities. The power draw is relatively low, the runtime required is modest, and the cost avoidance from preventing even one unplanned reboot pays for the UPS many times over.
HMIs and SCADA Systems
Human-machine interfaces and SCADA systems collect data, display process status, and in many cases send commands to PLCs. An HMI that loses power typically requires a controlled restart and re-connection to the PLC network before the operator can monitor or control the line. A SCADA system that loses power mid-shift may lose buffered data that was not yet written to the historian, creating gaps in the production record that affect quality documentation and traceability.
Communication and Network Infrastructure
Modern manufacturing facilities depend heavily on plant-floor networking: Ethernet connections between PLCs and SCADA systems, wireless access points for handheld devices, safety systems that communicate over the network, and increasingly, IIoT sensors and edge computing devices. A network switch that loses power takes down communication for every device on that segment. Protecting the communication infrastructure with a small UPS is often the single most cost-effective plant floor power protection investment.
Server Rooms and Control Rooms
Facilities with on-site servers running MES, ERP, or historian software need the same level of UPS protection as any other critical server environment. Online double-conversion topology is appropriate here for the same reasons it applies in a data center: zero transfer time, complete power quality isolation, and clean output for sensitive electronics. See our guide on how to choose a UPS system for a detailed comparison of UPS topologies.
Choosing the Right UPS Topology for Industrial Applications
The three main UPS topologies, standby, line-interactive, and online double-conversion, each offer different levels of protection. In manufacturing environments, the right choice depends on what is being protected.
For PLC and HMI protection in a machine cabinet, a line-interactive UPS with automatic voltage regulation is often sufficient. It provides protection against the sags and swells that motor starts create without the added cost and complexity of online double-conversion. The transfer time to battery is in the two to four millisecond range, which is fast enough for most PLC power supplies.
For server rooms, SCADA servers, historian servers, and communication infrastructure that cannot tolerate any interruption, online double-conversion is the appropriate choice. The load requirements for these systems are typically larger, the sensitivity is higher, and the cost of an unplanned interruption is greater.
For VFD protection specifically, the approach depends on the drive's sensitivity. Many modern VFDs have internal DC bus capacitance sufficient to ride through a brief sag without faulting. For drives that do fault on sags, a line-interactive UPS or voltage regulator on the VFD input provides protection without requiring the full cost of online double-conversion for what may be a large power draw.
As an Eaton Power Advantage Partner, Power Place provides access to Eaton's industrial UPS product lines, including units rated for extended temperature ranges, enhanced particulate resistance, and the power density required for machine cabinet installation.
Runtime Sizing for Manufacturing UPS Applications
In a manufacturing context, UPS runtime requirements are typically different from a data center or office environment. The goal is not to keep the plant running on battery for an extended period. It is to provide enough time to bring the production line to a controlled stop, preserve PLC and SCADA state, and safely transition to a shutdown or generator condition.
For most PLC and control panel protection applications, five to fifteen minutes of runtime is appropriate. That is enough time to complete an in-cycle operation, save controller states, and follow a controlled shutdown sequence. Running a production line on battery power indefinitely is neither the goal nor a practical option for most manufacturing loads.
For facilities with backup generators, the runtime calculation changes to matching the generator start time plus a meaningful margin. Most industrial generators start and stabilize within fifteen to thirty seconds. A ten-minute UPS runtime provides substantial margin over that window.
For communication infrastructure, runtime requirements are similar. Network switches and communication servers should be protected long enough for the plant to execute a safe shutdown sequence and for any pending data writes to complete.
Surge Protection for the Plant Floor
Surge suppressors play a different role in manufacturing than in a commercial office. The surge threats in a manufacturing facility are more frequent and more severe: motor switching events, power factor correction capacitor switching by the utility, and the same storm-season transient events that affect all Georgia commercial facilities.
Service entrance surge protection is essential for any manufacturing facility with sensitive controls. Panel-level and machine-level surge protection for the most sensitive equipment provides additional protection against internally generated switching transients. In a plant environment, transient suppression is not an optional accessory. It is a required layer of protection for any control system worth protecting.
Power Quality Monitoring Before You Buy
The most common mistake manufacturing facilities make when addressing power quality is purchasing equipment based on assumptions about the problem rather than data about what is actually happening on their circuits.
A voltage sag problem needs different protection than a harmonic distortion problem. A transient problem needs different protection than a sustained undervoltage condition. Buying the wrong equipment may improve the situation partially but leave the real problem unaddressed.
A professional power line monitoring assessment records every power quality event on your circuits over five to seven days and produces documented reports showing exactly what is present: sag frequency and severity, transient activity, harmonic distortion levels, and any unusual events correlated with your production schedule. With that data, the right protection solution can be specified accurately.
Power Place offers power line monitoring nationwide, including for manufacturing facilities throughout Georgia and the Southeast. The monitoring equipment ships to your facility, records your power environment, and returns to us for analysis. The resulting reports give you the data to make the right protection investment and to justify it to operations management or plant ownership.
Serving Georgia's Manufacturing Sector
Power Place has been providing UPS systems and power protection services to manufacturing facilities across Georgia and the Southeast since 1986. We understand the operating conditions, budget constraints, and production continuity priorities that define power protection decisions in a plant environment.
Contact us to discuss UPS selection for your facility, a power line monitoring assessment, or a service agreement for your existing UPS systems. For related reading, see our guides on UPS maintenance and inspection schedules, power quality problems in commercial facilities, and building a layered power protection strategy for Southeast businesses.
Frequently Asked Questions
Do manufacturing facilities need UPS systems?
Yes, for specific loads. Production lines have sensitive electronic controls, PLCs, HMIs, SCADA systems, and network infrastructure that are vulnerable to the sags, transients, and harmonic distortion common in plant power environments. A UPS protecting the control electronics does not need to be large. It needs to be appropriately sized for the control load and provide enough runtime for a controlled shutdown. The cost of protecting PLC and communication infrastructure is almost always justified by preventing even one unplanned production stoppage.
What UPS topology is best for PLC protection?
Line-interactive with automatic voltage regulation is typically the right choice for PLC and HMI protection in machine cabinets and control panels. It provides protection against the voltage sags caused by motor starts, has a transfer time fast enough for most PLC power supplies, and costs less than online double-conversion for the same capacity. Online double-conversion is appropriate for server rooms and communication infrastructure where zero transfer time and complete power quality isolation are required.
How do VFDs affect the power quality in a manufacturing facility?
VFDs are significant sources of harmonic distortion. They draw current in a non-sinusoidal pattern that introduces harmonic frequencies onto the building's electrical distribution. High Total Harmonic Distortion stresses transformer windings, causes overheating in neutral conductors, and can cause breakers to trip at loads well below their rated capacity. In facilities with many large VFDs, harmonic distortion measurements are often the most important single indicator of power quality conditions. A power line monitoring assessment will quantify the THD on your circuits.
What runtime should a manufacturing UPS provide?
For PLC and control protection, five to fifteen minutes is the typical specification. The goal is enough runtime to complete an in-cycle operation, save controller states, and execute a controlled shutdown sequence. For facilities with backup generators, the runtime needs to cover the generator start and stabilization window with margin, typically thirty to sixty seconds plus buffer. Running the production line indefinitely on battery is neither the goal nor practical for most manufacturing loads.
Can a standard commercial UPS be used in a manufacturing environment?
A commercial UPS can provide backup power, but it may not be suited to the physical conditions in a plant environment. Elevated temperatures, airborne particulates, vibration, and restricted installation space all affect UPS reliability and battery life. UPS systems installed in manufacturing environments should be rated for the actual ambient conditions, particularly temperature. Industrial-grade UPS systems with enhanced temperature ratings and particulate resistance are available for harsh environments.
How does motor starting affect UPS-protected equipment?
Large motor starts draw several times running current during acceleration, creating a voltage sag on circuits sharing the same distribution. Controls and electronics on those circuits may respond to the sag by faulting, rebooting, or losing their operating state. A line-interactive UPS with voltage regulation can compensate for these sags, preventing them from reaching the protected load. If sags are frequent or severe enough that the UPS is transferring to battery repeatedly during normal production, the distribution circuit design or the power conditioning approach should be reviewed.
Does Power Place service manufacturing facilities outside Atlanta?
Yes. UPS system sales and power line monitoring cover manufacturing facilities throughout Georgia and the broader Southeast. Power line monitoring is available nationwide: the monitoring equipment ships to your facility anywhere in the continental United States. On-site service for UPS installation, battery replacement, and maintenance covers the Atlanta metro and Southeast region. Contact us to confirm service coverage for your specific location.