Can someone let me know the science behind this please. I’ve been told that if there is a fault on a circuit the ZS values in the regs are there to give ADS in a time that is not going to cause considerable harm. My question is if disconnecting times don’t comply what is the dangers that arise I know it’s physics but have seen marshalling bars carrying current through earthing conductors all day and we don’t get a shock of them. Thank you for you help in advance guys just want to clear up some unanswered questions.
But fault from live to metal case is one fault, and in the hopefully short period where the correctly sized ADS operates, the case is bit live, but how live rather depends on the Zs and the fault current.
If Zs is way too high, that is moving in the direction of broken earth...
But fault from live to metal case is one fault, and in the hopefully short period where the correctly sized ADS operates, the case is bit live, but how live rather depends on the Zs and the fault current.
If Zs is way too high, that is moving in the direction of broken earth...
