Section-6
04-3008_S6_ABB_OPMCPDPA-S2_GB_121202
Page 2/6 ABB
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6.1 MULTI-CABINET
CONFIGURATION
6.1.1
Concept of Multi-Cabinet Configuration
The
CONCEPTPOWER DPA
TM
S2
Cabinets may be paralleled for power capacity or for redundancy
indefinitely. Every standard
CONCEPTPOWER DPA
TM
S2
is provided with the parallel option and therefore no
time-consuming upgrading is necessary on site.
UPS 1
UPS 2
UPS n
Fig. 1.1.
CONCEPTPOWER DPA
TM
S2
Multi-Cabinet Chain.
The Multi-Cabinet Chain is based on a decentralized bypass architecture i.e. every UPS is provided with its
own static bypass. In a parallel system there is always one Master Module and the other Modules are slaves. If
at any time the master is faulty the next UPS (former slave) will immediately take over the master function and
the former master will switch off.
Every UPS unit in a parallel configuration is provided with a proper output parallel Isolator (IA2) which, when
opened isolates the corresponding unit from the parallel system. Once the parallel isolator (IA2) of a unit is
open that unit (module) is isolated from the rest of the parallel system and therefore does not provide power to
the output.
For example if you perform the command “LOAD TO BYPASS” on any unit, all the units will transfer the load
simultaneously to mains and if you perform the command “LOAD TO INVERTER” on any unit all the UPS’s will
simultaneously transfer the load to the inverters.
The
CONCEPTPOWER DPA
TM
S2
is paralleled for redundancy (highest availability) or for power parallel
systems.
IMPORTANT:
The BYPASS MODE (ECO-MODE) function of a parallel systems is the same as in single
units of
CONCEPTPOWER DPA
TM
S2
. If in a parallel UPS system the load is transferred to the BYPASS (load
on mains) and if the mains fails, the UPS’s will all be automatically transferred to inverter within 5msec.
