1 starting the self-test by tapping, 2 completion of the self-test, Self-test in accordance with dk 5940, ed. 2.2 – SMA SB 1200 Installation User Manual
Page 40: Applies to italy only), Starting the self-test by tapping, Completion of the self-test
Commissioning
SMA Solar Technology AG
40
SB12-17-IA-en-52
Installation Guide
6.3 Self-Test in accordance with DK 5940, Ed. 2.2
(applies to Italy only)
6.3.1 Starting the Self-Test by Tapping
You can start testing the disconnection times by tapping on the enclosure lid. 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 once on the display
of the inverter.
4. The question on whether you would like to start the
test sequence appears in the display. Tap on the
display again within 30 seconds in order 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 6.3.2 ”Completion of the Self-
Test” (page 40).
6.3.2 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. During the test sequence, the inverter will not
react to tapping.
The self-test changes the upper and lower shut-down 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 shut-down threshold),
the inverter disconnects itself from the grid. In this way, the inverter determines the reaction time and
checks itself.