NAUTILUS 10●520
Three phase in/out
Rev.00
– 09 Luglio 2015
28
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the inverter LED will switch off and at the same time the acoustic signals will be activated.
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Open the BATTERY breaker
;
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Open the UPS door to easily access to the main power switch
;
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Switch OFF the input breaker.
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Open the OUTPUT power switch. The UPS shuts down
;
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To completely isolate the UPS from AC Mains, all input switches of Utility shall be completely off, which
includes the ones for rectifier and bypass.
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The primary input distribution panel, which is often located far away from the UPS area, so a label should
be posted to advise service personnel that the UPS circuit is under maintenance.
WARNING!
Wait for about 5 minutes for the internal D.C. bus bar capacitors to be completely discharged
.
4.2.6
Start up procedure for systems in parallel
Connect the parallel cable, the input / output cable and the battery cable, correctly change the jumpers on
the parallel board.
Measure the negative and positive voltage of the batteries. The battery switch is temporarily open.
Check that the monitoring module power switch is closed. By default it is closed.
Close the output switch of the distribution unit from the front door.
Set the operating mode for each UPS following the start-up procedure for each unit. The operating mode
is changed from single to parallel. Set the parallel number for each UPS. Up to 4 units can be put in parallel.
Set the parallel ID for each UPS, the ID must be different for each UPS.
Close the switches of all the modules. Close the external input switch and start from the mains.
After booting from the network, check the LCD interface of each UPS to see if the ID and the VA match
those set.
Close the external battery switch of each UPS. Verify that the charging current shown on the LCD is
normal.
Note!
The UPSs cannot be connected in parallel until each unit is working properly.