Online UPS Specialist OPP Series, Operating Manual

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- 9 - Revision 1.0
General Description
1.3. Key Features of the OPP1000 to
OPP6000
Self configuring battery pack. All UPS’ utilise batteries and,
depending on the power rating of the UPS, the internal DC
“string” voltage will be different: the higher the voltage, the lower
the current needs to be in order to deliver the same power and
consequently the UPS is less bulky and more efficient. To
optimise efficiency, the higher the kVA rating of the UPS, the
higher the “string” voltage used.
In the OPP design, the battery pack is configured in multiples to
achieve the required string voltages at higher kVA ratings.
The advantage of this is:
1. The right battery packs are always available.
2. The blocks are “plug and play” so installation is very fast.
3. Technical installations people are not needed to
install/change the batteries
4. The packs are small enough that they are considered a
“one man lift” so shipping & installation is much easier.
Dual mains input. Most UPS’ have one mains input, however
the OPP has 2. It is common for comms rooms to be fed from 2
supplies (possibly 2 phases of the same supply) so that if there
is a problem on one supply the other can take over and prevent
the UPS from needing to discharge its batteries until there is no
other option. In order to do this, ordinarily, a static switch is
required which selects “Mains 1” or “Mains 2” as the input to the
UPS depending upon which is available. Since OPP has 2
mains inlets, it is not necessary to have a static switch.
The advantages of this are:
1. Cost. No additional static switch
2. Less rack space. A typical static switch would be either
1U or 2U in height, once installed in the rack this takes
away space which could be used by other equipment
3. The UPS is never running from battery (which has a finite
life to it) when there is another mains supply available.
Extended “uptime” for the load and extended lifetime for
the batteries.