Quote:
Originally Posted by Alan Anderson
That might not actually end up being the case. Several main breaker trips I saw this past season were quite definitely attributable to hot wires warming up the breaker rather than the breaker itself reacting to true overcurrent.
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That's interesting Alan - thanks for pointing that out. I hadn't considered that. Towards the end of the season our robot was blowing the main too, but I can't say how hot the wires were. It's only a 4 cim drive and Andy mentioned he's never had a problem blowing the main before, but I think this year we had a shorter path from battery to breaker to PDB than we ever had (inches, with one cable just 2 connectors butted together with no wire showing) so we could potentially supply more current through the main breaker than ever before.
Hmm, I wonder if this would warrant throwing some thermocouples on and seeing just what the temp profiles are on the breaker and on the cables leading to it while we stall it against a wall.
What did you see that would make the wires heat the breaker? How did they solve this?