Why a Line-Interactive UPS Is the Best Choice for Your Data Center

Posted by Enconnex Team on October 30, 2020

Power outages are a fact of life. According to a 2018 report from S & C Electric and Frost & Sullivan, 24 percent of businesses experienced a power outage once a month or more. Almost half (41 percent) of the outages lasted five to 59 minutes, while 26 percent lasted an hour or more.

However, detectible power outages account for only a small percentage of power disturbances. Utility power is also plagued with surges, sags, electrical noise, harmonics, load fluctuations, and other interference. Even under normal utility operations — with no storm or lightning in sight — enterprise IT systems can be bombarded daily by conditions that damage critical components.

That’s why it’s important to select an uninterruptible power supply (UPS) that offers more than just standby power. Line-interactive UPS units provide more features than offline units to protect sensitive IT equipment from power disturbances.


What Is an Offline UPS?

When IT equipment is plugged into an offline UPS, it is receiving power directly from the input source rather than the UPS unit’s inverter output. The inverter, which converts the battery’s DC power to AC, is “offline.” The battery charger is connected to the input source so that it can keep the battery fully charged and ready to go when needed.

When the input power fails, the UPS automatically connects the IT equipment load to the inverter’s output. This can take up to 10 milliseconds. The offline UPS also has surge suppression and electromagnetic line noise filtering capabilities.


What Is a Line-Interactive UPS?

A line-interactive UPS has a smarter design in which the DC-to-AC power inverter is “inline” with the UPS unit’s output. When the input power source is functioning normally, the inverter is in AC-to-DC mode to charge the battery. If the input power source fails, the UPS unit’s transfer switch opens and the inverter reverses so that the battery can power the IT equipment.

The load transfer time for a line-interactive UPS is less than 4 milliseconds. Because the inverter remains on line, line-interactive UPS units minimize switching transients and provide under- and over-voltage protection as well as surge suppression and electromagnetic line noise filtering.


Line-Interactive UPS Benefits


Energy Efficiency

UPS efficiency is measured by the amount of input power used for the IT equipment load versus operating the UPS. In a line-interactive UPS, as little as 2 percent of the input power is used to charge the battery, meaning that the UPS can provide up to 98 percent efficiency.

Heat Load

Because line-interactive UPS units are energy-efficient, they generate less heat than other types. When the input power is present, a line-interactive UPS can operate at ambient outside temperature.


Fewer components and lower operating temperatures mean that line-interactive UPS units are highly reliable and have a long operating life.


Line-interactive UPS units cost more than offline UPS units but also offer greater protection. The value depends upon the use case in the data center.


The Enconnex AC6000 Lithium-Ion UPS

The AC6000 is a line-interactive UPS, with a four-millisecond or less transfer time when input power loss is detected and has the ability to protect sensitive IT equipment from a wide range of power disturbances. With a highly efficient and rugged design, the AC6000 can operate in any data center environment at up to 105 degrees.

The AC6000’s lithium-ion battery delivers 6kW of power in a compact, lightweight unit. Let us show you how the AC6000 delivers robust capabilities in an eco-friendly design. Learn more here!


Posted by Enconnex Team on October 30, 2020

Learn more about Enconnex

Get to know Enconnex with a customized fit-out