OPTI-UPS ES1500C - Manual (Page 11)

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1. INTRODUCTION
1.1 Overview
These models are advanced line-interactive simulated sinewave
uninterruptible power systems (UPS) designed to prevent spikes, surges, sags,
transients and blackouts from reaching your sensitive equipment. Your
equipment may include such items as computers and computerized
instruments to telecommunication systems. When AC power is present, the
UPS filters and conditions the power continuously. When AC power fails, the
unit employs its internal maintenance-free battery to supply back-up power
without interruption.
Enhance Series Block Diagram
1.2 Frequency Auto Sensing
The ES models can operate in either a 50 or 60 Hz environment. When you
plug the UPS into an AC outlet and turn it on, it will automatically detect the
incoming line frequency and configure itself to match that frequency.
1.3 Smart Buck and Boost Line Conditioning
The voltage from your AC power source can fluctuate above and below the
standard rating. This microprocessor controlled UPS provides line conditioning
via both buck (step-down voltage) and boost (step-up voltage) functions. For
example, if your normal voltage is 120V and the voltage fluctuates up to 135V,
the buck function in your UPS will step it down so that your equipment receives
approximately 120V. If the voltage fluctuates down to 105V, the boost function
will step it up so that your equipment receives approximately 120V. This
provides your equipment with excellent voltage regulation with less possibility
for the UPS to drain its internal battery.