Typical sizes range from 500VA to 1MVA, single and three phase UPS, monoblock and modular UPS types. The UPS output is ‘no-break’ maintained by the seamless transfer between DC power sources (input rectifier output or battery) and the internal capacitance of the UPS system. An automatic transfer switch (relay or static based) monitors the output from the inverter and automatically transfers the load to the raw mains power supply if the inverter output sine wave collapses during an UPS overload, short-circuit or fault condition. The inverter is constantly running and powering the load using either a rectified mains power or generator supply or connected battery set. Online UPS systems: offers the most secure form of uninterruptible power when mains power supply is present and when a power outage occurs.The three types of uninterruptible power supply include: Most people are aware that a UPS system provides battery backup, but few are aware of the three major types of UPS available. The choice often comes down to cost, availability, and the application needs. When selecting a UPS system to protect your server room or other critical IT applications, how do you choose between a traditional lead acid battery for your UPS and the latest lithium-ion battery backup solutions? Whilst lithium-ion battery packs offer longer working lives, lead acid are the more cost effective and to a wider degree more environmentally friendly.
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