Shutdown Of A Single Unit In A Parallel System - GE Digital Energy LP 33 Operating Manual

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8.2.4

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.
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.
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
Remark: command INVERTER ON will be enabled only
when the inverter voltage of each phase
decreases below 7 VAC (about 30 seconds).
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).
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).
OPM_LPS_33E_10K_30K_4CN_V010.doc
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Inverter:
U2= 7V
Udcp= 5V
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Operating Manual LP 33 / 10-20-30 kVA
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GE
INVERTER ON
INVERTER OFF ‫٭‬
INVERTER ON ‫٭‬
INVERTER OFF
U1= 7V
U3= 7V
Udc Voltage
Udcn= 5V
INVERTER ON
INVERTER OFF ‫٭‬