"Earth to neutral fault" with TN-C-S supply ?

I can't quote you as the website is being a pain.

It appears to have little or nothing to do with the AFDD unless that is introducing extra impedance into the conductors to create the fault.
 
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Indeed - but they do not seem to understand that such is not true if the neutral current is travelling in the same direction (i.e. backwards' in comparison with the normal situation) as the direction of the line current.

As I've said, just take two loads and run both of their feeding L conductors (or N conductors) 'the same way around' through the jaw of a clamp meter, and the meter will show the sum of the two currents, not the difference between them
So you obviously have a higher knowledge and intellect to them. Enlighten them.
 
I can't quote you as the website is being a pain.
Indeed, the site is doing all sorts of irritating things today!
It appears to have little or nothing to do with the AFDD unless that is introducing extra impedance into the conductors to create the fault.
So it seems - which, as I've said, does not explain why they (and seemingly all other manufacturers) do not mnake the same comment about all residual current devices.

I don't even really see the point of their comment (in relation to any device). If pressing the test button (on anything) fails to make the device trip, then an electrician is going to investigate, probably starting with the circuit and then the device.
 
I don't even really see the point of their comment (in relation to any device). If pressing the test button (on anything) fails to make the device trip, then an electrician is going to investigate, probably starting with the circuit and then the device.
To me the point is quite plain.

If the device doesn't work initially, suspect a circuit fault before blaming the device.

Are you actually a spark?
 
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So you obviously have a higher knowledge and intellect to them. Enlighten them.
[ This site is certainly being a complete pain today! ]


I strongly suspect that they would not take seriously an attempt at enlightenment from a 'lay' person such as myself!

If there are any electricians here who understand, and agree with the argument I've presented (which would seem to relate to pretty simple/basic electrical principles), then they might be more inclined to be enlightened by such a person.

Having said that, if there are no other takers I would be prepared to have a try. Would you be agreeable to my quoting to them their reply to you which you posted?
 
To me the point is quite plain. .... If the device doesn't work initially, suspect a circuit fault before blaming the device.
Quite. Seemingly a statement of the obvious - even if I don't understand their explanation.
Are you actually a spark?
Not at all. That's why, as I've just written, I don't think I'm really the person to try to 'enlighten' them.
 
Oh, by the way, just looked and the same statement appears on the data sheet for their RCBO's without AFDD protection too.
OK, thanks. I must have missed that. It makes the situation a bit more consistent, but they presumably still believe in the 'explanation' I find difficult to understand for all the devices in question?
 
[ This site is certainly being a complete pain today! ]


I strongly suspect that they would not take seriously an attempt at enlightenment from a 'lay' person such as myself!

If there are any electricians here who understand, and agree with the argument I've presented (which would seem to relate to pretty simple/basic electrical principles), then they might be more inclined to be enlightened by such a person.

Having said that, if there are no other takers I would be prepared to have a try. Would you be agreeable to my quoting to them their reply to you which you posted?
Quote away. I have no issue with that.
 
OK, thanks. I must have missed that. It makes the situation a bit more consistent, but they presumably still believe in the 'explanation' I find difficult to understand for all the devices in question?

You answered your own question in #37
 
I asked if you were a spark, your reply was:
Not at all. That's why, as I've just written, I don't think I'm really the person to try to 'enlighten' them.
Indeed - but I don't really understand in what sense my reply was "answering my own question".

Which question of mine?
 
Indeed - but I don't really understand in what sense my reply was "answering my own question".

Which question of mine?
The questions you have asked including why you don't understand.

I can't be bothered with this nonsense, if you won't ask the manufacturers, who fully understand the issue, then I don't have the time and energy to continue this.

It seems to be unqueried by everybody but you.
 

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