The active redundant parallel operation will switch automatically to the increase power mode if more power is required at the output of the UPS. This implements that the redundancy level decreases or will diminish completely. On the other hand the level of redundancy of the UPS will increase if the power consumption on the output decreases.
The distribution generally is realised in the low voltage main distribution (LVMD) where the external and the following sub distribution for connected load circuits takes place. Such parallel control panels in wall cabinets including an external HU as well as input and output control panel can also be ordered via AEG Power Supply System and their partners.
9.2Setup / connection of the parallel operation field
The mains connection of each UPS is realised analogue to the description in chapter 5.
For the single phase mains connection for each UPS the same phase has to be used, i.e. all UPS have to use either L1 or L2 or L3 (no mix!). The supply of the multi pole central external manual bypass has to be realised with this phase.
The UPS outlets are connected via separator with the parallel operation
The following applies for output and input lines of the UPS: The difference in length of the lines with a line length of up to 20 m may not vary more the 20% and with more than 20 m not more than 10%.
The default bridge between “JP1” and “JP2” in the control panel of every UPS has to be removed. The distribution of the output has to be executed according the instructions of chapter 5. Please take care of the exact labelling of the elements to prevent any operation error. The communication between the parallel connected units is realised with the 25 pole parallel operation line that comes with the UPS.
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