Summary 

A UPS, or battery backup, gives power to computers and related gear during outages, dips, and surges. This UPS definition covers standby and online systems, their protection level, and their cost. It also shows how to size a unit, watch the load, and avoid heavy start-up devices. Volta can help with UPS planning, UPS installation, and support. 

What Is a UPS? 

If you are asking what is a UPS, the UPS meaning is simple: it is a battery backup system for computers and other gear. 

UPS stands for uninterruptible power supply. In plain terms, the uninterruptible power supply definition is a battery backup system that keeps equipment on when utility power fails. The main uninterruptible power supply application is to protect computers, servers, and related gear during power loss. 

Basic Types of UPS Systems 

There are two basic UPS types: 

  • Standby UPS, also called line-interactive UPS 
  • Online UPS 

Standby Power Systems and Line-Interactive Units 

A standby UPS watches the power line. If the line drops, it switches to battery power. That switch can take a few milliseconds. During that short gap, the computer may get no power. 

Standby units come in many sizes, based on the gear they protect. 

Online UPS Systems 

An online UPS avoids that gap by always powering connected gear through its inverter, even when normal power is present. 

Online units cost more than standby units, but they give better protection. 

Power Clipping and Surge Protection 

Online UPS units can also clip power spikes. 

If input power surges too high, the UPS trims the extra power to help protect the system from voltage overload. 

UPS Sizing 

The size of a UPS depends on the number of outlets it has and the devices you need to plug in. 

Monitors and Load Capacity 

Most UPS units have a built-in monitor that shows the load as devices are added. 

Do not load a UPS above 85% of its capacity. If power drops, the unit may not recover fast enough, and some devices may stop working for a short time. 

Built-In Monitoring and Alerts 

Most new UPS units include built-in monitoring for a laptop or desktop. 

Some can send a text or email alert if power is unstable, if the unit is offline, or if it is overloaded. 

Devices That Should Not Be Plugged Into a UPS 

Some devices should never plug into a UPS because they need a lot of power when they start. 

Large laser printers and scanners are common examples. They can draw more power at start-up than they do during normal use. 

Our Services 

Our team at Volta has installed many UPS devices. 

We can help your company choose the right UPS, and we can tell you which devices should stay off it. 

We also offer ongoing UPS services to handle the monitoring work for you. 

Contact Volta to get started today. 

Q&A 

Question: What is the main purpose of a UPS for computer systems? 

Short answer: A UPS gives battery-backed power when utility power fails, dips, or becomes unstable. This helps keep computers and related gear running long enough to avoid sudden shutdowns, reduce data loss, and protect systems from power problems. 

Question: How is an online UPS different from a standby or line-interactive UPS? 

Short answer: A standby or line-interactive UPS switches to battery after it sees a power drop, which can leave a brief gap of a few milliseconds. An online UPS avoids that gap by always powering connected gear through its inverter, even when normal power is available. Because of that, online UPS units usually cost more. 

Question: Why should a UPS not be loaded beyond 85% of its capacity? 

Short answer: Keeping the load under 85% helps the UPS respond well during a power drop. If it is overloaded, it may recover too slowly, and some connected devices may stop working until the UPS catches up. 

Question: Why should large laser printers and scanners not be plugged into a UPS? 

Short answer: Large laser printers and scanners often draw a lot of power when they start. That start-up load can exceed what the UPS is built to handle and may cause overload problems. 

Question: How can Volta help with UPS planning and support? 

Short answer: Volta can help you choose the right UPS, tell you which devices should not be plugged in, install UPS units, and provide ongoing UPS services for monitoring.