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OPM_LPS_3UO_30K_40K_0US_V010.doc Operating Manual LP 33 Series 30 & 40 kVA
7.2.5 Start-up an additional unit in a parallel system
Before connecting hazardous voltages, make sure that:
• The connection to the electrical system has been performed by qualified personnel;
• The equipment frame has been correctly grounded to the main earth;
• Make sure that mains input protection is removed;
• All the panels removed to allow the UPS connection have been correctly reinstalled;
• The UPS switches Q1 and Q2 are OFF (Pos. 0);
•
The battery fuses F5, F6, F7 (and eventual external fuses in case of external battery)
are removed.
This procedure must be performed when the load is supplied by the other units of the UPS system and
an additional unit must be switched ON and connected to the parallel bus in order to share the load
with each other.
This unit must be completely switched OFF and not powered.
1. Switch ON the mains power at the input distribution pane on
this unit.
As a result the UPS performs a self-test and the LCD will show
the following screen:
EXECUTING MAINBOARD
SELF TEST
00000000000
SELF TEST OK!
NOTE !
In case the alarm “4410 - Mains bypass out of tolerance” persists, please contact
your Service Center.
2. Insert the battery fuses F5, F6, F7 (and eventual external fuses in case of external battery) on
this unit.
3. Switch ON the output switch Q1 (Pos. I) on this unit.
LP 33 40kVA P2
APPLICAT. ON UTILITY
= 70%
Verify, selecting the screen METERING/Udcp and Udcn, that the
booster voltage has reached about 215 VDC of this unit.
Udcp=215V Udcn=215V
Ubp=164V Ubn=164V F
Charge level = 100%
Autonomy = 800min
4. Switch ON the inverter of this unit entering the screen:
MENU/COMMAND MENU/INVERTER ON
COMMAND MENU
INVERTER ON *
INVERTER OFF
When the inverter will be synchronized, the unit will be
automatically connected with the parallel bus-bar and the
load will be shared with the other units.
The main screen of each unit will display: APPLICATION ON UPS
LP 33 40kVA P2
APPLICATION ON UPS
= 70%
END OF PROCEDURE