Nowadays there are
many mission-critical applications that need a fault tolerant,
100 % reliable availability of utility power. By adding the
RPA-facility to the S603 (rear panel, 14), highest standards
for reliability can be met. The RPA-facility allows to connect
2, 3 or 4 units in parallel.
Connecting units in parallel
is attractive for several reasons.
Redundancy: To achieve
the highest possible level of power protection in a fault-tolerant
network.
By connecting units in parallel, using the N+x system, a redundant
system can be created. In this case all the
UPSs equally share the load in the system during normal operation.
In this way every possible single point of
failure will be eliminated. This means that if one of the
UPSs in the parallel system fails, the other(s) can still
supply the load guaranteeing full protection without any interruption.
Scalability: To
add power if needed without investments beforehand.
Another reason for paralleling units
is upgrading the power rating of the system. If e.g. a 6kVA
S603 is
installed, the power rating can be upgraded to 12kVA by adding
another 6kVA in parallel. This spread
investment makes sure that you don’t have to invest
in advance, but only when you need to.
S603 unique RPA system has
the following major advantages:
• S603 RPA offers true
redundancy because not only the power electronics are redundant,
but also the
batteries, the bypass circuit and the control logic,
• The RPA system is an option: you don’t have
to buy it if you don’t need it.
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