7.2.4Shutdown 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.

COMMAND MENU

 

INVERTER ON

 

INVERTER OFF

*

 

 

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

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

COMMAND MENU

 

INVERTER ON

 

 

*

INVERTER OFF

 

 

 

 

 

 

 

INVERTER:

U1= 7V

U2= 7V

U3= 7V

Frequency =

60.0Hz

Synchronized

 

 

 

 

Udcp= 5V

Udcn=

5V

Ubp=0V

Ubn=0V

O

Charge level

=

0%

Autonomy

=

0min

 

 

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).

Modifications reserved

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OPM_LPS_3UO_30K_40K_0US_V010.doc

Operating Manual LP 33 Series 30 & 40 kVA

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Image 48
GE LP 33 Shutdown of a single unit in a parallel system, With purpose to separate one unit from the parallel system, U1=

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