[RE-wrenches] Anybody else getting 240 arc fault codes on Fronius installs as frequently as me???

[Howard Arey]

No – I have not.

 

My strongest suspect in all of this is AC / DC conflict and insulation issues.

 

For those familiar, the DC and AC conductors run in the same space. Not too different than other inverters, I’d say. Fronius provides a conductor insulator sleeve for the AC conductors when the wires cannot be physically separated t othe left and right side (perhaps because of location of the array and where conductors enter the wire space.) WE have decided to now install those no matter what – can’t hurt.

 

Back to the megger testing…All of these are 600V applications and the conductor is rated for that. But the problems mostly (but not exclusively) occur at peak irradiance / middle of the day which leads me to believe the combo of high DC and high AC finally conflicts.

 

Perhaps time to invest in a megger tester. Next step for a professional installer I’d say. 

 

Thank you.

 

 

Howard “Scot” Arey

254-300-1228

 <mailto:scot.arey at solarcentex.com> scot.arey at solarcentex.com

 



 

 

 

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Glenn Burt
Sent: Monday, May 8, 2017 3:45 AM
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Subject: Re: [RE-wrenches] Anybody else getting 240 arc fault codes on Fronius installs as frequently as me???

 

Have you performed insulation resistance testing on all of your wiring?

  _____  

From: Howard Arey <mailto:scot.arey at solarcentex.com> 
Sent: ‎5/‎5/‎2017 14:17
To: 'RE-wrenches' <mailto:re-wrenches at lists.re-wrenches.org> 
Subject: [RE-wrenches] Anybody else getting 240 arc fault codes on Fronius installs as frequently as me???

I can’t imagine I’m the only one having this problem. Starting to suspect from Fronius that the problem is deeper than they let on.

 

240 faults are arc-fault detection for Fronius. 

 

We have checked every variable on our end – connectors, firmware, clean wire pulls. My teams are not perfect but I l know they are very good and know how important the clean installs are for us.

 

Most but not all of my issues are with bifacial modules. 

 

Anybody else have this issue?

 

Howard “Scot” Arey

Owner, Solar CenTex

254-300-1228

scot.arey at solarcentex.com <mailto:scot.arey at solarcentex.com> 



 

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