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Why can't the breaker just be reset like a house breaker? Shouldn't there be a physical switch in the fuse panel? Or if it's a consumable part that sacrifices i
by Veliladon 4y ago
Why can't the breaker just be reset like a house breaker? Shouldn't there be a physical switch in the fuse panel? Or if it's a consumable part that sacrifices itself like a regular fuse shouldn't it be user-replaceable? Being able to fix something roadside with a <$100 part seems to be easily achievable here.
- londons_explore 4y agoTypically these breakers (usually explosive fuses) are single use. They aren't expected to ever break in the lifetime of the car, and sometimes aren't replaceable (ie. They're sealed in under glue inside the non-disassemblable battery). The purpose of them is two fold:. They can save human life if you are an idiot and cut through high voltage wiring with a saw while the vehicle is powered up... In this case, they act like a GFCI. They can also act like overcurrent protection devices, which can prevent massive electrical fires in the case of a short. Normally there is also a contactor in the same current path. That is a software controllable switch. But the switch is relatively slow to turn off, and cannot turn off if the current flow is too massive - and in either case, the single use breaker will be used instead to prevent electrocution or a big fire.