OnLine Power Battery Backup System - Manual (Page 10)

OLP
Three Phase UPS Systems
1. SYSTEM OVERVIEW
1-6
(g) Plug & Play Modular design: The power circuit is separated into several
modules plugged into slots in the UPS. These are easy to pull out, permitting
quick maintenance and easier trouble shooting.
(h) Cold start function: the UPS can be started without an AC source, that is,
can be started with battery power only. This is possible because current limit
circuitry is added, preventing the problem of large inrush current blowing the
battery fuse and damaging the DC capacitors when batteries are connected to an
empty DC bus (before the DC bus is energized).
(i) Multi-CPU design: Several CPUs are employed in the control circuit and
critical functions are designed with parallel redundancy to improve reliability. If
one CPU were to fail, the other CPUs keep the UPS operational, and the output
AC is not affected.
(j) Protection against misuse: The UPS is designed with breaker on/off sensor,
power supply sensor, etc. any operational mistake made by the user causes no
harm to the UPS.
(k) Accepts wide input range: The UPS is designed to accept a wide input
voltage range, so that it can work effectively under an unstable AC source. All
of the input components used are specifically selected to handle extreme high
voltage and high current.
(l) Operating environment: Each component of the UPS is chosen with a large
safety margin to accommodate extreme environments, such as temperature,
humidity, altitude, shock or contamination.
(m) Intelligent charger: The UPS automatically recharges (boost charge) the
batteries every time the batteries are depleted to a voltage level equal to 2V/Cell.
Thus, the batteries can be restored to full capacity as soon as possible and made
ready for the next back-up requirement. In order to keep the batteries in the
best condition, the UPS will boost charge the batteries for several hours
(selectable) automatically every month. To avoid over charging the batteries,
boost charge will stop when the ambient temperature is over 35
o
C (95
o
F).