[RE-wrenches] SMA Arc-Fault

[jerrysgarage01]

DaveDid you make your MC Cables, are there any jumpers used, l have seen crimped terminals cause faults and over time will overheat and fail open. Just a thought.Jerry


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-------- Original message --------
From: Matthew Sirum <matthewsirum at gmail.com> 
Date: 11/14/16  1:07 AM  (GMT-10:00) 
To: re-wrenches at lists.re-wrenches.org 
Subject: [RE-wrenches]  SMA Arc-Fault 

Greetings Dave,

Have you considered possibly installing a hybrid type transient
voltage surge suppressor (TVSS), to include filters to remove high
frequency EMI/RFI?  Or possible a straight line filter device?  If
this nuisance arc fault issue is still occurring and it may be related
to an AC issue you may be able to get some technical help and advice
from an engineer at one of the TVSS manufacturers such as Total
Protection Solutions, Richmond, VA 800.647.1911 or Surge Suppression
Incorporated, Destin, FL 888.987.8877.  I would also recommend
reaching out for an application engineer in the SPD division at Eaton.
Eaton Technical Resource Center 800.809.2772.  SSI also has a very
experienced field troubleshooting technician they send all around the
country to help contractors with difficult electrical issues... Of
course that would probably cost $1000-$2000 per day.

I avoid using piercing taps and connectors.  I prefer to use service
entrance tap boxes, insulated multi port connectors, or line side
rated power distribution blocks.  I cannot help but wonder if there
may be an actual arc event occurring at one or more of the piercing
taps which is somehow picked up by the DC AFCI.  In commissioning this
system it would be a good idea to use a non-contact IR thermometer
and/or thermal imaging camera/scope to check the piercing taps for
excessive heating while the conductors are energized and carrying peak
currents.

I hope you are successful in resolving this issue soon.  I will
continue to follow the thread.  Hopefully we can all learn something
from this.

Best regards,

----MATT

Matthew Sirum
P.O. Box 1227
Greenfield, MA 01302-1227  USA
phone: +1.413.773.0611
email: MatthewSirum at gmail.com
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