GE Digital Energy LP 33 - Shutdown of a Single Unit in a Parallel System

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OPM_LPS_33E_10K_30K_4CN_V010.doc 68/82 Operating Manual LP 33 / 10-20-30 kVA
8.2.4 Shutdown of a single unit in a parallel system
With purpose to separate one unit from the parallel system.
INVERTER ON
> INVERTER OFF ٭
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 ke
y
Enter must be pressed 2 times.
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 rectifier-input fuses F1, F2, F3 and the battery fuses F9, F10, F11 (remove
the external battery fuses in case of external battery) only on this unit.
> INVERTER ON ٭
INVERTER OFF
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
Inverter: U1= 7V
U2= 7V U3= 7V
Remark: command INVERTER ON will be enabled only
when the inverter voltage of each phase
decreases below 7 VAC (about 30 seconds).
Udc Voltage
Udcp= 5V Udcn= 5V
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).
INVERTER ON
> INVERTER OFF ٭
6. 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.
7. Switch OFF the mains power only on this unit at the AC input distribution panel.
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).