An uninterruptible power supply, also uninterruptible power source, UPS is an electrical apparatus that provides emergency power to a load when the input power source, typically mains power, fails. A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide near-instantaneous protection from input power interruptions, by supplying energy stored in batteries.
A UPS is typically used to protect hardware such as computers, data centers, telecommunication equipment or other electrical equipment where an unexpected power disruption could cause injuries, fatalities, serious business disruption or data loss.
The line-interactive UPS is similar in operation to a standby UPS, but with the addition of a multi-tap variable-voltage autotransformer. This is a special type of transformer that can add or subtract powered coils of wire, thereby increasing or decreasing the magnetic field and the output voltage of the transformer. This is also known as a Buck–boost transformer.
The line-interactive UPS is an economical, full featured UPS that delivers cost-effective power protection in a compact package. The UPS provides battery-backed outlets and a surge protection-only outlet. The UPS battery offers four minutes of backup power at full load — ample time to shut down protected equipment if an outage occurs.
Line-interactive ratings range from 400VA to 2200Va and as it is economical it is normally used for non-critical power protection for small office computers and electronic equipment
In an online UPS, the batteries are always connected to the inverter, so that no power transfer switches are necessary. When power loss occurs, the rectifier simply drops out of the circuit and the batteries keep the power steady and unchanged. When power is restored, the rectifier resumes carrying most of the load and begins charging the batteries. The main advantage of an on-line UPS is its ability to provide an “electrical firewall” between the incoming utility power and sensitive electronic equipment.
The online UPS is ideal for environments where electrical isolation is necessary or for equipment that is very sensitive to power fluctuations. Although once previously reserved for very large installations of 10 kW or more, advances in technology have now permitted it to be available as a common consumer device, supplying 500 W or less. The initial cost of the online UPS may be higher, but its total cost of ownership is generally lower due to longer battery life. The online UPS may be necessary when the power environment is “noisy”, when utility power sags, outages and other anomalies are frequent, when protection of sensitive IT equipment loads is required, or when operation from an extended-run backup generator is necessary.
For a product to be sold by us it has to be ‘best-in-class’ for a wide range of factors including efficiency, Total Cost of Ownership (TCO) and life cycle management. Using our range of Eco UPS Systems from Tower to Rack-Mount type we can design, project management, install and maintain a high-level resilient solution for your data center or comms room, local area network (LAN) or Point of Sale application that will deliver outstanding value for money and meet your protection needs.