SUNWAY M XS 7500TL
INSTALLATION AND
PROGRAMMING INSTRUCTIONS
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5.4.
Grid Interface Protection Autotest
The Grid Interface Protection Autotest enables checking the operation of the grid disconnecting device
(Interface Protection) as required by the Grid Administrator (for Italy: Guida Per Le Connessioni alla rete
elettrica di Enel Distribuzione, Ed. 1.1 - 1/244 December 2009).
The following tests may be carried out:
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test for the minimum voltage protection trip;
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test for the maximum voltage protection trip;
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test for the minimum frequency protection trip;
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test for the maximum frequency protection trip.
During the test, the inverter automatically varies the trip threshold of the variable to be tested until the
protection trips, thus allowing checking if the integrated relay connecting the inverter to the grid opens. When
this happens, the inverter stops, the interface contactor opens and the threshold value is fixed to the trip
value. At the same time, the trip time of the protection is displayed.
After few seconds, the normal operation of the inverter is automatically resumed and the default values are
reset.
The inverter decoupling events are stored to the Event History.
The inverter is to be producing energy (parameters FIELD OK = 1, GRID OK = 1 and RUN = 1 on the
inverter Status page). The Status page may be accessed by pressing the Icon status from the status bar.
Figure 89: RUN status page