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Author Topic: Arcing/sparking/something from my solar inverter AC main breaker with ferrite  (Read 338 times)

W9IQ

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I should add that you may want to investigate a potential faulty or shorted to ground neutral connection on that circuit. It would be unusual for the ground wire to be required to bring the common mode filter into balance.

- Glenn W9IQ
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- Glenn W9IQ

God runs electromagnetics on Monday, Wednesday and Friday by the wave theory and the devil runs it on Tuesday, Thursday and Saturday by the Quantum theory.

AK4YA

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Well now the ferrite with all 4 through it has started buzzing real loud.  I cant find anything wrong inside that inverter - but the electrician who wired the home and solar all up for me is coming by next week.
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W9IQ

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You may want to run a cable tie or two around the core so that the gap is minimized and regulated.

- Glenn W9IQ
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- Glenn W9IQ

God runs electromagnetics on Monday, Wednesday and Friday by the wave theory and the devil runs it on Tuesday, Thursday and Saturday by the Quantum theory.

AK4YA

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making it really tight with a ziptie makes it worse, which is pretty disconcerting.

now, its a pretty big mix75 ferrite though
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W9IQ

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What is the Fair-Rite part number of the core you are using?

- Glenn W9IQ
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- Glenn W9IQ

God runs electromagnetics on Monday, Wednesday and Friday by the wave theory and the devil runs it on Tuesday, Thursday and Saturday by the Quantum theory.

AK4YA

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odd- I could have swore I put the part# and link on the previous message.
Its a Fair-Rite 0475176451 https://www.mouser.com/ProductDetail/Fair-Rite/0475176451?qs=%252B6g0mu59x7I%252BCmoSR0e6cg%3D%3D&countryCode=US&currencyCode=USD
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W9IQ

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I suspect that the AC current through the core still is not balanced. You may want to ask your electrician about that when he or she is there.

Another possibility is that the switching harmonics are so strong that their current is saturating the core. Unfortunately there isn't a larger type 75 core available. You would need to switch to type 31.

- Glenn W9IQ
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- Glenn W9IQ

God runs electromagnetics on Monday, Wednesday and Friday by the wave theory and the devil runs it on Tuesday, Thursday and Saturday by the Quantum theory.

AK4YA

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If it was the latter then would using a bunch of those larger mix75 toroids just outside the enclosure work?
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W9IQ

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Yes, that can help. The question is how many? Those cores are not inexpensive.

- Glenn W9IQ
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- Glenn W9IQ

God runs electromagnetics on Monday, Wednesday and Friday by the wave theory and the devil runs it on Tuesday, Thursday and Saturday by the Quantum theory.

W9IQ

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Perhaps you can conduct a temporary experiment by putting the three cores that are on the three protected circuits onto the one troublesome line.

- Glenn W9IQ
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- Glenn W9IQ

God runs electromagnetics on Monday, Wednesday and Friday by the wave theory and the devil runs it on Tuesday, Thursday and Saturday by the Quantum theory.

AK4YA

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I had 3 extras of those big ones so I was able to leave the 1 there in the inverter and put the others in the AC mains panel where that same inverter line enters it.  Its maybe 8 ft total of cable as they are almost directly next to each other.  I was able to get all 3 new of these big clamp on ferrites around all 4 conductors as well.

The buzzing is not as bad now but theres basically zero power going through (heavy clouds all day) right now. so the buzzing is really at a min.  Cannot feel it but can still hear it if I put my ear close enough.  Also the RFI trash is still there albeit subdued, but thats likely due to the low solar output instead of the new ferrites.
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W9IQ

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Any update after some sunny days?

- Glenn W9IQ
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- Glenn W9IQ

God runs electromagnetics on Monday, Wednesday and Friday by the wave theory and the devil runs it on Tuesday, Thursday and Saturday by the Quantum theory.
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