Start-Up An Additional Unit In A Parallel System - GE LP 33 Series Operating Manual

8.2.5

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 input fuses rectifier F1, F2, F3 and battery fuses F9, F10, F11 is 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. Insert the rectifier input fuses F1, F2 and F3 of this unit.
2. 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:
NOTE !
In case the alarm "4410 - Mains bypass out of tolerance" persists, check the phases
rotation of the input mains.
3. Insert the battery fuses F9, F10 and F11 (insert the external battery fuses in case of external
battery) on this unit.
4. Switch ON the output switch Q1 (Pos. I) on this unit.
Verify, selecting the screen METERING/Udcp and Udcn, that the
booster voltage has reached about 400 VDC of this unit.
5. Switch ON the inverter of this unit entering the screen:
MENU/COMMAND MENU/INVERTER ON
When the inverter will be synchronised, 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
Modifications reserved
OPM_LPS_33E_10K_30K_4GB_V030.doc
END OF PROCEDURE
EXECUTING MAINBOARD
SELF TEST
00000000000
SELF TEST OK!
LP 33 20kVA P2
APPLICAT. ON UTILITY
= 70%
Udcp=400V Udcn=400V
Ubp=273V Ubn=273V F
Charge level = 100%
Autonomy = 10min
COMMAND MENU
INVERTER ON
INVERTER OFF
LP 33 20kVA P2
APPLICATION ON UPS
= 70%
Operating Manual LP 33 Series / 10-20-30 kVA
*
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