SMA SB 3300 Installation - Manual (Page 38)

Commissioning SMA Solar Technology AG
38 SB33_38-IEN111851 Installation Guide
6.2 Self-Test in accordance with DK 5940, Ed. 2.2
(applies to Italy only)
6.2.1 Starting the Self-Test by Tapping
You can start testing the disconnection times by tapping on the enclosure lid. A prerequisite here is
that the country configuration of the inverter has been set to Italy (IT/DK5940) or "trimmed". Proceed
as follows for checking the disconnection times:
1. Connect the PV generator with the inverter. The inverter can only initialize if the PV generator
produces enough power. It is therefore not possible to test the disconnection times at night.
2. Connect the inverter on the AC side. For this, you have to create the AC connection (AC plug
or direct connection) and/or switch on the line circuit breaker of the grid cable (fuse or
automatic circuit breaker).
3. The inverter is now in the initialization phase, i.e. all 3 LEDs are glowing at the same time.
Start the self-test immediately after all 3 LEDS have gone out by tapping on the display of the
inverter.
4. The question of whether you would like to start the
test sequence appears in the display. Tap on the
display again within 30 seconds to confirm the
question.
Once you have started the test sequence, the inverter checks the disconnection times for overvoltage,
undervoltage, maximum frequency and minimum frequency one after the other. During the tests, the
inverter shows the values in the display which are described in section 6.2.2 ”Completion of the Self-
Test” (page 38).
6.2.2 Completion of the Self-Test
Note the values which are displayed during the self-test. These values must be entered into a test
protocol. The test results of the individual tests are displayed 3 times, one after the other. The
respective display message is displayed for 10 seconds.
The self-test changes the upper and lower disconnection thresholds for each protective function on a
linear basis with a modification of 0.05 Hz/s and 0.05 Vn/s for the frequency and voltage
monitoring. As soon as the actual measurement value is outside the permitted range (altered
disconnection threshold), the inverter disconnects itself from the grid. In this way, the inverter
determines the reaction time and checks itself.