OnLine Power Power Wave 4 - Manual (Page 17)

6005-145 Rev. A 1-6
(g) Plug & Play Modular design: The power circuit is separated into several
modules plugged into slots in the ELI, which are easy to pull out,
permitting quick maintenance and easier trouble shooting.
(h) Cold start function: the ELI 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. Therefore, in case of one CPU failure, the other CPUs keep the
ELI operational, and the output AC is not affected.
(j) Protection against misuse: The ELI is designed with breaker on/off
sensor, power supply sensor, etc. Therefore, any operational mistake made
by the user causes no harm to the ELI.
(k) Accepts wide input range: The ELI is designed to accept a wide input
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 ELI is chosen with large
safety margin to accommodate extreme environments, such as
temperature, humidity, altitude, shock or contamination.
(m) Intelligent charger: The ELI will automatically recharge (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 ELI 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).