BPS-250  (260-0250)              Features              Faxback Doc. # 5873

The control circuitry connected to the battery is kept in phase and in
synchronization with the AC wall outlet power (when there is a voltage
present) by constantly monitoring it.  When the input voltage drops below
105 volts or exceeds 135 volts, the 250W (2.2 Amps) of battery backup power
switches on, smoothly and automatically, with the output voltage in phase
and in synchronization with the AC line voltage.  Switching to battery
backup power sets off an intermittent audible alarm  When the voltage is
restored to the minimum of 108 volts or falls again to below 130 volts or
falls again to below 130 volts, the control circuitry, smoothly and
automatically, switches back to the wall outlet power after a 3 second
delay and turns off the audible alarm.  These power transfers take place in
less than 4 milliseconds.  In addition, the control circuitry and an
integral regulated charger is plugged into a live grounded power line
(regardless of the position of the Output Power switch).  The unit is also
protected with a low-battery cutoff circuit to prevent complete discharge
of the battery.

Transient voltage spike(voltage surge) suppression provides a total of 240
joules (in 3 modes).

     NOTE:  This unit was designed and tested for use with equipment such
     as personal computers.  The output wave form is non-sinusoidal.  Use
     with other appliances could result in overheating or other safety...
     hazards.

(jlc-10/11/93)
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