[mundoelectrico] I NEED TO GET THE RESISTANCE OF A GROUND SYSTEM WITHOUT DISCONECT ELECTRICALLY

[Luis LLumigusín]

DAR FRIENDS

I HAVE A LITLLE PROBLEM.I NEED TO HAVE THE RESISTANCE MEASURE OF A GROUND SYSTEM 

IT IS NOT POSSIBLE TO DICONECT THE EARTHING SYSTEM, BECAUSE IT IS A BUILDING, WHICH WORK, 24 HOURS, 365 DAYS A YEAR.

I HAVE SEEN THOSE CLAMPS (FLUKE), THE MAKER SAYS THAT IT IS POSSIBLE TO MEASRURE THE RESISTANCE WITHOUT DISCINECT ELECTRICALLY.

MAYBE, SOMEBODY COULD GIVE ME ANY IDEA IN ORDER TO MAKE THAT MEASURE.

MY REGARDS

MR. LUIS LLUMIGUSIN

QUITO - ECUADOR

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[Juvencio Molina]

Dear Luis.

According to IEEE-81 you do not need disconnect the ground cable to make measurement of the system.. In fact, the disconnection is forbidden for safety reasons.

The problem in your task ..The clamp ground tester is not appropriate for the complex system.. This one is useful only in one simple electrode (Example, copperweld bar)..or in the ground grid perimeter..

You need apply other measure method.. Fall potential test / slope method test o similar.. But not apply the Clamp ground tester..!!

Regards,

J.Molina A

2015-07-31 18:17 GMT-04:30 Luis LLumigusín <toq...@yahoo.com>:

DAR FRIENDS

I HAVE A LITLLE PROBLEM.I NEED TO HAVE THE RESISTANCE MEASURE OF A GROUND SYSTEM 

IT IS NOT POSSIBLE TO DICONECT THE EARTHING SYSTEM, BECAUSE IT IS A BUILDING, WHICH WORK, 24 HOURS, 365 DAYS A YEAR.

I HAVE SEEN THOSE CLAMPS (FLUKE), THE MAKER SAYS THAT IT IS POSSIBLE TO MEASRURE THE RESISTANCE WITHOUT DISCINECT ELECTRICALLY.

MAYBE, SOMEBODY COULD GIVE ME ANY IDEA IN ORDER TO MAKE THAT MEASURE.

MY REGARDS

MR. LUIS LLUMIGUSIN

QUITO - ECUADOR

--

Juvencio Molina A.

[Miguel Martinez Lozano]

Apreciado Luis,

La solucion es la medicion sin desconexión por el método de la caida de potencial con discriminacion de corrientes, como lo describe la ultima version (creo 2012 o 2013) de la IEEE Std 81-1.

Saludos,

Miguel Martinez Lozano