SMA SMC 4600A Installation - Manual (Page 45)

SMA Solar Technology AG Commissioning
Installation Manual SMC46-60A11-IA-en-81 45
6.2 Only for Italy: Self-Test in Accordance with CEI 0-21
6.2.1 Starting the Self-Test
The self-test only applies to inverters of type SMC 6000A-11 which are commissioned in Italy.
The Italian standard requires that all inverters in plants ≤ 6 kW feeding into the electricity grid
perform a self-test in accordance with CEI 0-21. During the self-test, the inverter will check the reaction
times for overvoltage consecutetively, undervoltage, maximum frequency and minimum frequency.
The self-test changes the upper and lower trip-limit values for each protective function on a linear basis
for frequency monitoring and voltage monitoring. As soon as the measured value exceeds the
permitted trip-limit value, the inverter disconnects from the electricity grid. In this way, the inverter
determines the reaction time and checks itself.
After the self-test has been completed, the inverter automatically switches back to the feed-in
operation, resets the original shutdown conditions and connects to the electricity grid.
Requirements:
• Country data set must be configured to CEI0-21 Int / CEI 0-21 intern.
or
• Country data set must be configured to trimmed / Special setting based on
CEI0-21 Int / CEI 0-21 intern.
• A report for entering the test results in compliance with CEI 0-21 must be available.
• The inverter must be in operation and in the start-up phase.
1. As soon as the configured country data set appears in the display, tap once on the display
within ten seconds.
☑ A message informing you that the self-test has started is shown in the display:
Avvio Autotest.
If the information Avvio Autotest is not shown in the display, the period of ten seconds has
expired and the self-test does not start.
– Restart the self-test (see Section 6.2.3).
2. Tap on the display within 20 seconds and enter the test results into the test report as they
appear.
☑ The self-test starts.
☑ The inverter displays the results of the individual tests for overvoltage, undervoltage,
maximum frequency and minimum frequency. The results are displayed three times in
succession for ten seconds each.
Example: Display messages for overvoltage test
• Name of the test: Autotest (59.S1) 240.00V
• Disconnection value: Valore di soglia con 230,00 V
• Normative value: Va. taratura 253.00V
• Disconnection time: Tempo intervento 0.02s
• Current mains voltage: Tensione di rete Val.eff.: 229.80V