AEG PV.500-MH Benutzerhandbuch

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Protect PV.500-MH Operating Instructions 
26 of 68 
80000043212 BAL 
 
5 System 
Function 
5.1 
Description of Sequence Control 
As soon as the equipment's control module is supplied with volt-
age, sequence control starts. 
Initially, load interrupter switch Q4 remains open. Once the initiali-
sation phase is complete and if no deactivating faults are pending, 
load interrupter switch Q4 is closed. During subsequent operation, 
the switch is only opened by deactivating faults ( Chapter 6). 
Inverter output contactor K7 remains open initially. The contactor is 
switched by the sequence control. 
The figure below provides a graphical illustration of the sequence 
control statuses. 
Fault
OFF
Waiting for feed 
conditions
Fault
Operation
Night
Feed-in 
conditions met
Operating 
conditions 
no longer 
met
ON command
OFF command
OFF command
OFF command
Daytime detection
Night-time detection
Fault
Fault
Fault 
acknowledgement
OFF command
Delay 
complete
Fault
Waiting
 
Figure 6  
Sequence control     
5.1.1  The "OFF" Status 
The equipment has been switched off logically via the DOU or the 
master control unit.  
The equipment is running without faults, the monitoring systems 
are not activated. 
In this status, no power is fed into the mains. 
Possible change of status: 
The status can be switched from "OFF" to "Waiting for feed condi-
tions" by switching the equipment on via the DOU and the master 
control unit. 
5.1.2  The "Waiting for Feed Conditions" Status 
The values of the DC voltage on the PV cells, the mains voltage 
and the mains frequency are monitored by the equipment. 
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