Rcd tripping when doing zs test

[paul1012]

I have a Kewtech KT62 MFT which doesn't have the 'no trip' setting. Does this mean I will have no choice but to always calculate zs? Am I right in thinking that bypassing or short cicuiting RCDs is not allowed?

So does this mean I will be able to measure zs with a no trip tester?: Isolate your circuit and at the circuits furthest point cross connect the LINE-CPC, as you would if doing a R1=R2 test at your CU.

Set the MFT to the EFLI test and place the black probe on the load side of your isolated protective device ie MCB and your red probe on the supply side of your RCD and test as
normal.


Thanks [/QUOTE
Do you not need a three pobe tester to test EFLI as it is live test.?