SMA NR-PC-KP20L.BG1, Replacement Manual

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4 Disconnecting the Inverter from Voltage Sources SMA Solar Technology AG
Replacement Manual STP50-40-COM-RM-xx-11 14
9. For STP 50-40 / STP 50-JP-40 (use of Sunclix DC
connectors): Release and remove the DC
connectors. To do so, insert a flat-blade screwdriver
or an angled screwdriver (blade width: 3.5 mm) into
one of the side slots and pull the DC connectors out.
When doing so, do not lever the DC connectors out,
but insert the tool into one of the side slots only to
release the locking mechanism, and do not pull on
the cable.
1
2
10. For STP 50-US-40 / STP 33-US-41 / STP 50-
US-41 / STP 62-US-41 (use of Amphenol DC
connectors): Unlock the DC connectors using the
corresponding unlocking tool and remove (refer to
the manufacturer manual for further information).
2
1
11. Ensure that the DC connectors on the product and those that are equipped with DC
conductors are in perfect condition and that none of the DC conductors or DC plug contacts
are exposed.
12. Ensure that no voltage is present at the DC inputs on
the inverter using a suitable measuring device.
A
B
C
<30V
13. Unscrew (TX25) all ten screws of the enclosure lid of
the AC-Connection Unit and remove the enclosure
lid carefully towards the front.
10x
14. Set the screws and the enclosure lid aside and store safely.
15. 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:
2.5 mm (0.078 in)) into the measuring points of the respective terminal blocks.
16. 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: 2.5 mm (0.078 in)) into
the measuring points of the respective terminal blocks.
ENGLISH