AEG PROTECT 1 Series Operating Instructions Manual

Contents

55This results in the following constellations with n+x technology:1 + 0 Use of 1 unit max. 10, 15 or20 kVANo redundancy1 + 1 Use of 2 units max. 10, 15 or20 kVASingle redundancy1 + 2 Use of 3 units max. 10, 15 or20 kVADouble redundancy(max. expansion level)2 + 0 Use of 2 units max. 20, 30 or40 kVANo redundancy2 + 1 Use of 3 units max. 20, 30 or40 kVASingle redundancy(max. expansion level)3 + 0 Use of 3 units max. 20, 30 or40 kVANo redundancy (max.expansion level)The actively redundant parallel operation automatically switchesto power-increasing operation if the output power requirementexceeds the UPS single block power, i.e. the degree ofredundancy is decreased or is completely eliminated.Conversely, the active UPS redundancy degree automaticallyincreases again when the power consumption decreases.The connection normally takes place in the low-voltage maindistribution, which also contains the external manual bypassand the following subdistribution of connected load circuits.Such a parallel board can be purchased in a wall housing incl.external HU as well as feeder and load distribution board fromAEG Power Supply Systems via your specialist dealer.9.2 Set-up / Connection of Parallel Operation BoardThe mains connection of each individual UPS takes place in thesame way as described in chapter 5.The three-phase mains connection secured foreach UPS must always have the same phasesequence, i.e. all UPS units are supplied at theinput terminals L1, L2 and L3 by the samephase each time (no mix!).In UPS bypass mode, the phase L1 is used toconnect the single-phase load with the mains.The central external manual bypass, which musthave an all-pole design, must also be suppliedby this phase L1.