3W vs 4W Inverters and Ground vs Neutral
3W vs 4W Inverters and Ground vs Neutral
(OP)
We are seeing 3W inverters desiring interconnections to the solidly grounded power system from PV systems. There is an issue as to how does this type of a 3W system perform a phase-neutral voltage protection measurement as required in the 1547 standards etc. There is a desire of the interconnector to use a bonded 4th wire as the ground/neutral which is not safe.






RE: 3W vs 4W Inverters and Ground vs Neutral
Bill
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"Why not the best?"
Jimmy Carter
RE: 3W vs 4W Inverters and Ground vs Neutral
RE: 3W vs 4W Inverters and Ground vs Neutral
In theory you can parallel a 3 wire system with a 4 wire system and it becomes a non-separately derived system. You will not able to feed single phase load from the PV system alone, but you can certainly feed power back to the grid.
What is 'desiring" ? They are either made and approved for grid connection or or not. Isn't there a manual with those inverter?
Rafiq Bulsara
http://www.srengineersct.com
RE: 3W vs 4W Inverters and Ground vs Neutral