ABB PRO-33.0-TL Series, Product Manual

Page: 60 / 136

60 Electrical installation
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DC cabling connection for the -SX model
WARNING! Do not do electrical work on the unit unless you are a qualified
electrician. Obey the instructions in Chapter Safety on page 11 . Failure to obey
the safety instructions can cause injury or death, electromagnetic interference and
equipment malfunction.
To connect the DC cables on the -SX model:
1. Make sure that the DC switch is set to OFF on the inverter.
2. Isolate the inverter from all power sources. Refer to
Inverter isolation on page 16 .
3. Install the PV quick connectors to the DC input cables. Refer to DC PV quick connector
assembly (-SX) on page 61 .
4. Make sure that the DC cables have permanent string number and polarity markings.
5. Measure that the polarity of the strings at the DC connectors is correct.
6. Remove the sealing caps from the applicable connectors at the inverter. Keep the unused
sealing caps at the installation site.
7. Connect the strings to the inverter one string at a time. Start with connectors DC1+ and
DC1-. Do not make sharp bends in the cables close to the connectors.
8. Attach the cables to suitable supports outside the inverter.