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May 21
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, 2024, 2:52pm
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Earth fault. (Read 10075 times)
JohnDavies
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Re: Earth fault.
Reply #17 -
Feb 1
st
, 2005, 10:56am
Will get Ze checked when I have the job inspected on cmpletion. I think it's one of the standard tests anyway.
Thanks again
JohnD
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Last Edit: Feb 1
st
, 2005, 10:57am by tjohndavies
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JohnDavies
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Re: Earth fault.
Reply #18 -
Feb 1
st
, 2005, 11:15am
Righto.
Thanks
JohnD
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supersparky
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Re: Earth fault.
Reply #19 -
Feb 1
st
, 2005, 1:40pm
well if u found you had a Ze value of 600 ohms i think you would be happy you checked
ze is the imendence from the supply terminals of the recs transformer to the supply incomre in your house.
R1 is resistance of phase (live)
R2 is resistance of earth...which were supposed to call the CPC conductor now
Zs is the actual earth loop impendence (total)
Zs = Ze + R1 + R2
ss
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Last Edit: Feb 3
rd
, 2006, 12:20am by LSpark
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supersparky
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Re: Earth fault.
Reply #20 -
Feb 1
st
, 2005, 1:52pm
i modified that last 1 mate.
the "expected" value (the MAX supposdly for Ze) on a TNS is 0.8 ohms
On a TNCS its 0.35 ohms
like bugger id take their values
ss
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supersparky
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Re: Earth fault.
Reply #21 -
Feb 1
st
, 2005, 3:41pm
yeh they are the max ze figures....the one you will be given by the rec to cover emselfes
ss
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