how is this done? Is expensive kit required? If so, how does this kit work? Just curious as so how one finds the resistance of something (earth rod) without passing a current through it and measuring the other side
crafty1289 said:how is this done? Is expensive kit required? If so, how does this kit work? Just curious as so how one finds the resistance of something (earth rod) without passing a current through it and measuring the other side
wait a few secs and there you have it - the earth fault impedance
plugwash said:its the loop impedance between live and earth.
i'm not sure exactly how they measure it, my guess is they use a varying load and measure how it affects the voltage but i don't know for sure.
Not too hot though:Lectrician said:The transformers internal resistance will be very low, and extreamly low on larger transformers (think of the cable sizes exiting the tranny, the internal coils will need to be sized according to current carrying capacity aswell! (although, they are allowed to run hotter).
comms said:Just took a look at the link to tlc for measuring efli it shows diagram of direct measurment, then states dissconnect equipotential bonding before conducting test, GN3 states the opposite(2.7.14) for direct measurement of Zs
how is this done? Is expensive kit required? If so, how does this kit work? Just curious as so how one finds the resistance of something (earth rod) without passing a current through it and measuring the other side
I don't know whether to laugh or cry....felling about not knowing,, do what i did ,, goto ebay and type in this ,,Digital Multi Function Loop Tester (Socket and See) all the instructions are there it will tell you whats wrong and the fault,, then goto electriciandiy.co.uk and there you will proberbly find the right way to resolve your problem,, now you might just feel like good luck
I don't know whether to laugh or cry....felling about not knowing,, do what i did ,, goto ebay and type in this ,,Digital Multi Function Loop Tester (Socket and See) all the instructions are there it will tell you whats wrong and the fault,, then goto electriciandiy.co.uk and there you will proberbly find the right way to resolve your problem,, now you might just feel like good luck
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