this post was submitted on 21 Dec 2023
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Would not reset at all.
Basically, the breaker has an internal switch and an external operating handle. When it trips, the internal mechanism of the breaker disengages the internal switch from the external handle, and flips the internal switch to its open position. The handle can't toggle the internal switch while it is disengaged.
To re-engage, you have to move the handle to the full "off" position. The internal switch re-engages the handle, and the handle can now toggle the switch again.
This breaker cannot be shut off manually, nor can it be reset manually. But, it can still trip in case of a fault.
It's kinda like if you have a pushbutton start car, but you drop off the passenger who has the key fob. The car will continue running until it is shut down or stalls out. But once that happens, you can't restart it without the key fob.
Neat, that's a really clever mechanism