Step-by-Step Guide:
The following steps should be followed to perform an IV curve trace with NEP RSDs and Seaward IV Curve Testers:
Step 1: Turn On the RSD (if system already commissioned, skip to step 2)
· Connect all PV-strings to the inverter.
· Turn on testing mode on the inverter (turn on inverter without powering string)
· Wait for the inverter to fully turn on
Step 2: Turn off the Inverter
· Turn off the inverter at its control panel after it is fully on
Step 3: Turn off all Disconnects
· Turn off all DC disconnects at the inverter first
· Turn off the AC disconnect at the inverter after all DC disconnects are off
Step 4: Disconnect the PV String for Testing
· Disconnect the PV string that you want to run the IV curve test on
· Connect your Seaward testing equipment to run the test
Step 5: Test the PV String
· Test the PV string with the Seaward equipment to obtain IV curve data
· Record the data for future reference and analysis
Step 6: Reconnect the Tested String
· Reconnect the tested string to the inverter
· Move on to the next PV string to repeat steps 4 to 6
Step 7: Repeat step 1
· After all PV strings are tested, repeat step 1 to turn on the inverter
· The system is now ready for normal operation
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