These UPSs are hybrid devices that offer a higher level of performance by adding voltage regulation features to conventional standby designs. They are most effective in protecting against average high-voltage spikes and switching transients
Typically, line-interactive UPSs switch to battery to adjust the tap location down at certain intervals to maintain the output voltage as the input voltage changes. When the unit reaches a pre-determined point, it eventually goes to battery full-time. More advanced line-interactive UPSs provide a level of voltage regulation without engaging batteries and they deliver tighter output voltage windows than their predecessors.
SERVO A unit that is able to deliver consistent, regulated output voltage in a window of -10 percent to +6 percent meets (or exceeds) the operational guidelines recommended by the Computer Business Equipment Manufacturers Association. Switching to batteries on an as-needed basis means that line-interactive UPSs are able to operate more efficiently, but it necessitates that batteries be constantly recharged in a timely manner. Recharging happens in one of two ways – by using a standard trickle charge method or , in the case of Powerware, a proprietary three-stage charging technique called ABMTM (Advanced Battery Management). Batteries that are constantly trickle charged tend to reach the end of their useful life more quickly than those using ABM. In addition to nearly doubling battery service life, ABM optimizes recharge time and provides up to 60 days advanced notification of pending battery failure.
Line-interactive UPSs are frequently used to
protect a variety of networking devices, from hubs
and routers to servers.
Servo Stabilizer