those instructions are simply stating that the device lives only up to it's name.
![[Linked Image]](https://www.electrical-contractor.net/ubb/smile.gif)
i would wager that a perfect short across L1 & L2 , or perfect 'symetrical ground fault' from both to Grn that would leave a device set to trip @ 50ma untripped , while climbing into many 00000's of Amps would be hard even in a laboratory setting to create.
