What happens with the shunt with a rated capacity of 500 A if the current exceeds that with, say, 300 A for 10 seconds?
Does it just miss the 300 A in its calculation or does it burn and goes to the electronic heaven?
It probably won’t burn out, even though it generates almost four times as much heat in the process. 10 seconds would be too short for that. But it will probably cut off the range above 500 A. That could make it inaccurate as a battery monitor if it happens frequently.
Plenty of people reporting that the shunts survive OK if they see peak short term loads like engine starting in the old community.
Thanks. Yes, I saw that but most of the posts I read were about engine-starting, which would be during a much shorter time than my question.
My question is about installing a sternthruster (400 A) on a boat which also has a bowthruster (350 A) and in some situations I might need to run them both at the same time. Usual run-time in windy conditions would be around 5-15 seconds.