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Protect PV.630 Operating Instructions
8000047961 BAL 37 of 72
Figure 10 Linked operation in partner operating mode
Change of status to separate operation:
If capacity utilisation in the inverter which is switched on rises
above a certain value, once a delay has elapsed, the two inverters
are switched to separate operation.
First, the inverter which is switched on is switched off. Then, the tie
switch is opened. Once the tie switch is open, both inverters are
switched on.
Change of status to linked operation in the event of a fault:
In the event of a deactivating or self-acknowledging fault in the in-
verter which is switched on, the system switches to linked opera-
tion.
The inverter which is switched off is switched on. The faulty invert-
er is shut down due to the fault.
5.5.2 Single Operation
Both inverters are switched on and are feeding power into the
mains. The tie switch is open.
This operating mode is active when insolation levels are high.
Figure 11 Single operation in partner operating mode
Change of status to linked operation:
If the capacity utilisation of the two inverters falls below a certain
value, the system switches to linked operation once a set delay
has elapsed.
The MPP tracker is switched off in both inverters and an attempt is
made to regulate the two inverters to a uniform DC voltage. When
the DC voltages are approximately identical, the tie switch is
closed and one inverter is switched off. If the DC voltages cannot
be regulated to the same value in a certain time, the two MPP
trackers switch back on. Once a delay has elapsed, the MPP
trackers are switched back off again and the next attempt to match
the DC voltage is started.
Change of status to linked operation in the event of a fault:
In the event of a deactivating or self-acknowledging fault in one in-
verter, the two inverters are switched to linked operation. First, the
inverter which is not affected by the fault is also switched off.