Keeping the main breaker from tripping

[Cory]

Originally Posted by Monochron

The question would be, what is the case where the breaker trips meant to prevent?

• Is it to protect the breaker itself from damage?
• Is it to protect the motors from excessive currents over time?
• Is it to protect the motors from excessive heat.

I can't find any documentation stating which is true, but I would guess that it is a combination of all of the above.

It is to protect from uncontrolled discharge of the battery. The breaker protects whatever the branch circuit is, so essentially the main breaker is protecting the wiring from battery-main breaker-PDB.