I have just installed a 20kW SolarEdge inverter onto a 480V Wye grid. I am getting the error: Error 59: AC Voltage is too high on line 2 (it is 3 phase, and in Canada).
Here is a bit about the site:
-The grid is 208V stepped up to 480V via a pad mount transformer
-It is a large agricultural operation
-It is mounted on a pump house used for geothermal about 1600 meters FEET from most of the buildings (buried conductor)
Here are some notes about what I have tried:
-I checked the AC Voltage (it was within spec, and we also brought it down well below 480, but the same error persisted)
-Checked the waveform of the grid AC (it was not noticeably dirty)
-I contacted SolarEdge Support (they tried, but to no avail)
-I checked all of the conductor sizes (they were all appropriate)
-I checked all of the connections back to the grid service for tightness (they were tight)
-I replaced the inverter (the same error was given)
-I did a resistance test on the lines (results detailed below)
-I switched around the lines (detailed below)
When I did a resistance test (using 500VDC):
Testing the conductors into the inverter:
-Line 1-G, 2-G: 4.7 MOhm
-Line 3-G: 2.4 MOhm
-Line 1-2: 9.5 MOhm
-Line 1-3: 7.2 MOhm
-Line 2-3: 6.9 MOhm
Testing all conductors inside the building:
-550 MOhm (max of the testing equipment)
Testing the underground conductors:
-Line 1-2: 31 MOhm
-Line 1-3: 20 MOhm
-Line 2-3: 28 MOhm
-Line 1-G: 8.6 MOhm
-Line 2-G: 16.2 MOhm
-Line 3-G: 9.5 MOhm
When I switched the lines into the Inverter around (this is where it gets weird):
(Below, the first set of numbers correspond to the grid leg, and the second set correspond to the inverter leg)
-(1,2,3)->(1,2,3)=Error on Leg 2
-(1,2,3)->(1,3,2)=Error on Leg 1
-(1,2,3)->(2,1,3)=Error on Leg 1
-(1,2,3)->(2,3,1)=Error on Leg 2
-(1,2,3)->(3,1,2)=Error on Leg 2
-(1,2,3)->(3,2,1)=Error on Leg 1
Does anybody have any ideas? It is really throwing me for a loop!
Here is a bit about the site:
-The grid is 208V stepped up to 480V via a pad mount transformer
-It is a large agricultural operation
-It is mounted on a pump house used for geothermal about 1600 meters FEET from most of the buildings (buried conductor)
Here are some notes about what I have tried:
-I checked the AC Voltage (it was within spec, and we also brought it down well below 480, but the same error persisted)
-Checked the waveform of the grid AC (it was not noticeably dirty)
-I contacted SolarEdge Support (they tried, but to no avail)
-I checked all of the conductor sizes (they were all appropriate)
-I checked all of the connections back to the grid service for tightness (they were tight)
-I replaced the inverter (the same error was given)
-I did a resistance test on the lines (results detailed below)
-I switched around the lines (detailed below)
When I did a resistance test (using 500VDC):
Testing the conductors into the inverter:
-Line 1-G, 2-G: 4.7 MOhm
-Line 3-G: 2.4 MOhm
-Line 1-2: 9.5 MOhm
-Line 1-3: 7.2 MOhm
-Line 2-3: 6.9 MOhm
Testing all conductors inside the building:
-550 MOhm (max of the testing equipment)
Testing the underground conductors:
-Line 1-2: 31 MOhm
-Line 1-3: 20 MOhm
-Line 2-3: 28 MOhm
-Line 1-G: 8.6 MOhm
-Line 2-G: 16.2 MOhm
-Line 3-G: 9.5 MOhm
When I switched the lines into the Inverter around (this is where it gets weird):
(Below, the first set of numbers correspond to the grid leg, and the second set correspond to the inverter leg)
-(1,2,3)->(1,2,3)=Error on Leg 2
-(1,2,3)->(1,3,2)=Error on Leg 1
-(1,2,3)->(2,1,3)=Error on Leg 1
-(1,2,3)->(2,3,1)=Error on Leg 2
-(1,2,3)->(3,1,2)=Error on Leg 2
-(1,2,3)->(3,2,1)=Error on Leg 1
Does anybody have any ideas? It is really throwing me for a loop!
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