NAUTILUS 10●520
Three phase in/out
Rev.00
– 09 Luglio 2015
24
Position of Parallel card on 1400cm cabinet
WARNING!
When two 2000cm cabinets are connected in parallel, remove jumper J25 and J26 from all
parallel boards (MHTBSHR1CX01); if, on the other hand, three or four cabinets are
connected in parallel, remove the jumper J25, J26 and J27 from all parallel boards
(MHTBSHR1CX01).
When two 1.4-meter cabinets are connected in parallel, remove the jumper J21, J22, J23
and J24 from all parallel boards (MHTBSHR1CX01); if, on the other hand, three or four
1.4-meter cabinets are connected in parallel, remove the jumper J21, J22, J23, J24, J25
and J26 from all parallel boards (MHTBSHR1CX01).
3.11.4 Requirement for Parallel system
A group of UPS in parallel has the functionality of a single large UPS but with the advantage of being more
reliable. In order to ensure that all UPSs are used in the same way and comply with the wiring rules, the
requirements listed below must be respected:
1) All UPS must have the same power and be connected to the same power line.
2) Bypass input and AC input of the network must be connected to the same Neutral.
3) The outputs of all the UPS must be connected in parallel to the same point of the distribution board.
4) Electrical cables such as bypass input cables and UPS output cables should have the same length
and specifications. This facilitates the distribution of the load when operating in bypass mode..
