ฝัง
- เผยแพร่เมื่อ 24 พ.ค. 2023
- Yo!
In this video i run trhough the full process of earth fault loop impeadance testing and about of the theory behind the ZS test.
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The works carried out in the video and the opinions shared are my own, and not representative of the associates and companies in the video.
This content is purely for entertainment purposes and is in no way a "how to", tutorial or educational video.
Please consult an electrician when dealing with any electrical installations.
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Thanks for run through - nice video, well explained!
Excellent run through of what it is. Thanks
Thank you. That was very well presented. Well done you. Infact first class.
Thanks, glad you enjoyed it!
Great video as always Mike 👍🏼
Yes 👍
Brilliant 👏 thanks 👌🏻
Very good videos
I really appreciate
Can I test Zs on a lighting circuit with led fitting which lit up? Cheers
The most important test 🙌❤
Yes
Is this for TT system?
I think with your tester doesn't have to be a 3 lead test for low. Easier to use 2 lead low. Just change setting with F1 button.
Great content as usual.
Keeping things simple, thinking about a teaching career when you're too old to be on the tools?
Honestly if you lost any one then they need to go back to class. Best info for me was the quick summary on the fact different testers call it different things but the basics of hi and low (trip and no trip) and that most require 3 wire test on low.
Pro ❤❤🎉🎉
👍👍👍👍👍
Yes 👍👍
What’s the motor whirring in the background?
Sorry for going off the point, little Schneider VFD’s in that panel or softstarts?
@@residualcurrent noo, don’t apologise.
Loop testing description whilst in a panel is my jam mate. 😆😆😆👏🏻👏🏻👏🏻👏🏻👏🏻👏🏻
No volume
@@residualcurrent appoligies it was connected to my car . Dah
1st view!
Sorry, but stating that impedance and resistance are the same isn't the best approach in my opinion.
Impedance is resistance to AC current and the resistance value is purely the DC component. From your distribution board out along the final circuit which is just a cable, then yes, the impedance and resistance will be the same as the cable has no reactive component to it. That is why it is just measured with a resistance meter.
However, as you go back into the DNO supply from the distribution board and come to the transformer secondary winding, that does have both a resistive and a reactive element and the two added together will give the impedance. It therefore, must be measured with an AC Test Current.
If you measured the the DC resistance of the earth loop, you would get a lower value than if you measured the impedance value. The impedance value is more reflective of the actual fault current, where as the DC loop measurement would give a higher fault current, that the system would not be able to supply in reality.
If it wasn't "basically" the same how could you add R1 and r2 to Ze.
Yes Z is a measurement of resistance at a given frequency, but a straight run of copper should have negligible difference between Z and R, now a motor winding or an indicator coil or anything that produces a reasonable magnetic field then Z is greatly affected in relation to R.
Why would be listen to you when you’ve only ever installed 1 earth rod?
You been on the beer