Fluke 1623-2 Manual - Page 29

Advanced Operation, Measurements on High Voltage Pylons

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Earth/Ground Tester Advanced Operation Advanced Operation The Tester uses advanced features to measure earth resistance of a single high voltage pylon and soil resistivity for calculation and design of earthing systems. Measurements on High Voltage Pylons The measurement of the earth resistance of a single high voltage pylon usually requires the overhead earth wire to be disengaged (lifted off) or the separation of the earthing system from the pylon construction. Otherwise, false reading of the resistance of the pylon earth electrode are liable to occur because of the parallel circuit of the other pylons connected to each other by an overhead earth wire. The new measuring method employed in this instrument - with its external current transformer to measure the true current flowing through the earth electrode - allows measurements of earth electrode resistances without disconnection of the earthing system or disengaging the overhead earth wire. See Figure 9. 1 2 1623-2 EARTH/GROUND TESTER 4 Probe S/P2 H/C2 3 4 START >20 m >20 m Figure 9. Earthing Resistance without Disengaging the Overhead Earth Wire edv016.eps 21 MyFlukeStore Shop for Fluke products online at: www. .com 1.877.766.5412

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Earth/Ground Tester
Advanced Operation
21
Advanced Operation
The Tester uses advanced features to measure earth resistance of a single high voltage
pylon and soil resistivity for calculation and design of earthing systems.
Measurements on High Voltage Pylons
The measurement of the earth resistance of a single high voltage pylon usually requires
the overhead earth wire to be disengaged (lifted off) or the separation of the earthing
system from the pylon construction. Otherwise, false reading of the resistance of the
pylon earth electrode are liable to occur because of the parallel circuit of the other pylons
connected to each other by an overhead earth wire.
The new measuring method employed in this instrument - with its external current
transformer to measure the true current flowing through the earth electrode - allows
measurements of earth electrode resistances without disconnection of the earthing
system or disengaging the overhead earth wire. See Figure 9.
1623-2 EARTH/GROUND TESTER
START
S/P2
H/C2
4 Probe
>20 m
>20 m
1
2
3
4
edv016.eps
Figure 9. Earthing Resistance without Disengaging the Overhead Earth Wire
Shop for Fluke products online at:
1.877.766.5412
www.
MyFlukeStore
.com