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OPM_LPS_3UO_30K_40K_0US_V010.doc Operating Manual LP 33 Series 30 & 40 kVA
7.2.4 Shutdown of a single unit in a parallel system
With purpose to separate one unit from the parallel system.
1. Switch OFF the inverter only on this unit entering the screen:
MENU/COMMAND MENU/INVERTER OFF
Attention: to switch OFF permanently the inverter the key
Enter must be pressed 2 times.
COMMAND MENU
INVERTER ON
INVERTER OFF *
2. Switch OFF the output switch Q1 (0) only on this unit.
3. Perform the command total off only on this unit.
4. Remove the battery fuses F5, F6, F7 (and eventual external fuses in case of external battery)
only on this unit.
5. In order to discharge the DC link capacitors, start once more
the inverter only on this unit through the screen:
MENU/COMMAND MENU/INVERTER ON
COMMAND MENU
INVERTER ON *
INVERTER OFF
Remark: command INVERTER ON will be enabled only when
the inverter voltage of each phase decreases
below 7 VAC (about 30 seconds).
INVERTER: U1= 7V
U2= 7V U3= 7V
Frequency = 60.0Hz
Synchronized
Before proceeding to step 6, check on the display panel that
the DC link voltage (both polarities) Udcp and Udcn has reached
the minimum voltage of 5 VDC (about 30 seconds).
Udcp= 5V Udcn= 5V
Ubp=0V Ubn=0V O
Charge level = 0%
Autonomy = 0min
6. Switch OFF the inverter only on this unit entering the screen:
MENU/COMMAND MENU/INVERTER OFF
COMMAND MENU
INVERTER ON
INVERTER OFF *
7. Switch OFF the mains power only on this unit at the AC input distribution panel.
END OF PROCEDURE
WARNING !
In case the unit should be disconnected and removed from the operating system, the
operation must be performed by qualified persons.
If an intermediate unit must be disconnected from a parallel system pay attention
do not open the control bus: keep the plugs J3 and J4 connected to the board “P16 -
Connector adapter RPA” (see Section 4.8.4).