Megger Limited PWS / Nov 06
DET4TC/R Launch
22
Some resistance to ART
Finally, new ART forms can sometimes meet with additional resistance. However
with the DET4TC we easy ignore such resistance.
Sometimes it can be difficult to get the instrument close to where we need to make
our ‘X’ connection. The obvious solution is to use a long test lead, but this is going to
add additional resistance to our reading. However the solution is simple.
Simply select the 4P plus clamp range to use the ART method with four poles. Then
connect both the P1 and C1 terminals to the electrode system under test. Now the
potential measurement is taken at the electrode connection rather than the
instrument X terminal. The result is the lead resistance is totally ignored.
The Best Application of “ART”
There are many applications where ART work extremely well.
These include:
Field of earth / Earth Farms
Pole mounted transformers
Domestic TT (earth electrode) systems
Single guy lines on towers
Lightning protection electrodes
Potential Probe (P) Current
Probe (C)
Gr ou nd
Electrodes
Under
Test (X)
Building earth
connection/s
I Total
ISystem
Ie 1
Ie 2Ie 3
Ie Test
C1 and P1 connections
Potential Probe (P) Current
Probe (C)
Gr ou nd
Electrodes
Under
Test (X)
Building earth
connection/s
I Total
ISystem
Ie 1
Ie 2Ie 3
Ie Test
C1 and P1 connections
To Next Page
Loading...
Need help?
General
