User manual

FP series user manual
Allis Electric - 41 - Rev3. July 2005
6. Appendix
6.1 Technical characteristics
 Design principle
 Components description
 Input filter
This printed board assembly provides surge protection, certified by IEC 61000-4-5 and
IEC 801-5, and filters both electro-magnetic interference (EMI) and radio frequency
interference (RFI). It minimizes surges and interference present in the utility line and
keeps sensitive equipment protected.
 Current and power factor regulator
In normal operation, this circuit converts utility AC power to regulated DC power for the
inverter to use. This ensures that the input current has a sinewave form so that current
distortion will not reflect back to the utility. The FP-Series UPS can tolerate a wide input
range and has an overload power factor regulator alarm to alert the user that the UPS
has a heavy output load in abnormal low input voltage to extend the reliability of the
unit.
 DC/AC inverter
In normal operation, the inverter utilizes the regulated DC output and inverts it into
precise, regulated sinewave AC power. When the utility power fails, the inverter will
receive its required energy from the battery through the DC/DC converter. In both
modes of operation, the UPS inverter is on-line and continuously generates clean,
precise, regulated AC power for load. Current is very stable even with nonlinear loads.