What is the difference between an Online and Offline / Standby UPS?
A. There are two main types of Uninterruptible Power Supplies – Online and Offline / Standby. The terms Online and Offline / Standby refer to the general state of the UPSs internal inverter under normal mains conditions. Offline UPSs are the simplest and least expensive. When mains is present, it is routed straight through the UPS bypassing the inverter to the output. A degree of filtering is providing ensuring limited protection against spikes and other irregularities. The batteries are charged the whole time, but only in the event of a power failure will the load be fed by the inverter. The switching from mains to inverter supply ( generally referred to as Transfer Time ) usually takes a few milliseconds. However, a modern computer’s or office system’s internal power supply has sufficient power stored within it to survive this brief interruption of power – ensuring uninterrupted operation of the load equipment. Lower cost Offline UPS generally, when on inverter / battery backup, prov
Related Questions
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- What is the difference between an Online and Offline / Standby UPS?
