9 Disconnecting the Inverter from Voltage Sources
SMA Solar Technology AG
Operating manual STP50-4x-BE-en-23 93
14. Ensure there is no voltage on the AC terminal block between L1 and N, L2 and N, and L3 and
N using a suitable measuring device. To do so, insert the test probe (maximum diameter:
2.5mm) into the measuring points of the respective terminal blocks.
15. Ensure that there is no voltage on the AC terminal block between L1 and grounding
conductor, L2 and grounding conductor, and L3 and grounding conductor using a suitable
measuring device. To do so, insert the test probe (maximum diameter: 2.5mm) into the
measuring points of the respective terminal blocks.
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