GE Industrial Solutions LP11 924 Series 6 & 10 kVA - Manual (Page 45)

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OPM_LPU_11U_6K0_10K_1US_V010.Doc 44 User manual LP11 924 6 & 10 kVA UPS 1.0
7 - OPTIONAL FEATURES
7.1 - PLUG-IN CARDS
An option slot (13 in Fig.19) allows installation of a relay or SNMP plug-in card. See sections 6.3 and 6.4 for more
information.
7.2 - RPA-FACILITY (REDUNDANT PARALLEL ARCHITECTURE)
Many mission-critical applications need a fault tolerant, 100 % reliable availability of mains power. By adding the RPA-
facility to the UPS (14 in Fig.19), highest standards for reliability can be met. The RPA-facility allows to connect 2, 3 or 4
units in parallel.
Connecting GE Digital Energy UPS 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 LP 6-11U 924 is installed, the
power rating can be upgraded to 12kVA by adding another LP 6-11U 924 in parallel. This spread investment makes sure
that you don’t have to invest in advance, but only when you need to.
GE’s RPA system has the following major advantages:
• 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.
7.3 - SEISMIC ANCHORS
Seismic anchors can be ordered separately; contact your local GE authorized representative.