UPS power supply

Uninterruptible power supply (UPS) systems are used in a variety of different environments in which an interruption of power due to the variations or loss of the primary power source is unacceptable. Uninterruptible power supplies are required for many computer installations such as network file servers, telecommunications equipment or other applications where a sudden loss of power would create an unacceptable and costly occurrence. Commercial AC power waveforms are subject to many variations due to the demands of other users on the power line and other factors. Typical undesirable variations are over-voltage, under-voltage, voltage outages and signal transients. Undesirable variations also occur due to load conditions, as well as line conditions. Such occurrences include the loss of data during a data transfer or the shutdown of an entire business as a result of the loss of a computer. An uninterruptible power supply system comprising a battery connects between an electric power and electric equipment, and when the electric power is normal, the UPS charges the battery and provides a stable voltage to the electric equipment. When the electric power is abnormal, the UPS transforms the power of the battery into an alternating current power for providing the electric equipment with an uninterruptible electric power. According to different system designs, the UPS are classified as on-line, off-line, or and a line interactive. An on-line UPS system will keep certain electronics circuitry in a powered condition for the purpose of more quickly detecting the presence of a power outage and apply backup power to the protected system. An off-line UPS supplies power to a minimum of electronics circuitry, and in the event of utility power outage other electronic circuitry must be powered up so that the process of transferring to backup power can be implemented. The line interactive UPS is a hybrid of the online and standby units. Like the standby, it does not constantly draw from the battery, but it switches to battery faster when required. The line interactive unit does not use the battery when low voltage is encountered. It uses extra power from the AC source to make up the difference in voltage. In general, a UPS typically comprises a rectifier, inverter, and battery charger. The UPS uses the commercially supplied AC power to charge a DC battery.

UPS power supply product listings

Powerware UPS 9355

This advanced UPS delivers 10 kVA to 30 kVA of power protection in a sleek tower configuration which includes internal batteries. With such a small footprint, you have more options for locating the UPS and more data center space available for future expansion.