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I have a ccu with a Ze of 0.09 and it's supplying another ccu which that board supplies multiple other CCUs I was wondering how I would work out my zs and ze on the other boards?
Discuss Zs from board supplying another board in the Electrical Forum area at ElectriciansForums.net
I have a ccu with a Ze of 0.09 and it's supplying another ccu which that board supplies multiple other CCUs I was wondering how I would work out my zs and ze on the other boards?
Does it not become Zs at DB? from board to board, I hear what you're saying, but does my statement not hold water in this case?Ze is only at the origin, the rest are Zs.
Measure/calculate the R1+R2 for each distribution circuit and add the Ze. (Zs=Ze+(R1+R2))
Does it not become Zs at DB? from board to board, I hear what you're saying, but does my statement not hold water in this case?
Each board would have its own Zs, sometimes referred to a Zdb. I think we're saying the same thing.Does it not become Zs at DB? from board to board, I hear what you're saying, but does my statement not hold water in this case?
Yes exactly nice one MateEach board would have its own Zs, sometimes referred to a Zdb. I think we're saying the same thing.
But, 'Zs at DB1, 2, 3', whatever, is a statement...nothing wrong with the terminology, whatsoever.Yes it does become the Zs at the DB, but obviously that is also the Zs of the distribution circuit because they are one and the same thing.
Strictly speaking 'Zs at DB' or 'Zdb' are not correct terminology, much like 'ring main' instead of 'ring final circuit', everyone knows what is meant by it, it's commonly used, but it's not correct terminology.
If it's the origin CUU does anything need to go into
"Zs at DB" on the "Schedule of test results" form ?
Nope, unless it's not connected to origin.If it's the origin CUU does anything need to go into
"Zs at DB" on the "Schedule of test results" form ?
I agree with ipf, but there will always be a Jobsworth that disagrees with this though.But, 'Zs at DB1, 2, 3', whatever, is a statement...nothing wrong with the terminology, whatsoever.
Yes, the Zs at the DB goes in the "Zs at DB" box, the clue is in the name, it's not a trick question.
Bit of Confusion there, Someone did tell me I have to do the Ze test with all Parallel paths even at origin seems a bit pointless.Nope, unless it's not connected to origin.
You do your PEFC with all parallel paths connected at the origin not a ZE test .The Ze test determines the resistance of the earthing conductor external to the installation and confirms an earth connection to the installation hence it’s done with no parallel paths connected.Bit of Confusion there, Someone did tell me I have to do the Ze test with all Parallel paths even at origin seems a bit pointless.
If it's the origin CUU does anything need to go into
"Zs at DB" on the "Schedule of test results" form ?
I'm talking about Schedule of test result - Zs at DBYou do your PEFC with all parallel paths connected at the origin not a ZE test .The Ze test determines the resistance of the earthing conductor external to the installation and confirms an earth connection to the installation hence it’s done with no parallel paths connected.
Bit of Confusion there, Someone did tell me I have to do the Ze test with all Parallel paths even at origin seems a bit pointlessI'm talking about Schedule of test result - Zs at DB
The test carried out at the origin DB is the Ze not Zs. This is done with parallel paths removed to confirm the continuity and loop impedance of the DNO supply.ill just take it you don't have to do Zs at DB at origin DB, unless anyone says differently.
Reply to Zs from board supplying another board in the Electrical Forum area at ElectriciansForums.net
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