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The device displays the following parameters:
R
, U
and its frequency, I
SEL
S-ES
U
and its frequency), I-Act (I
H-E
To measure the resistances of electrodes H (Z) and S (Y), or if the resistance of
the electrodes is too high, start the measurement by a long press (approx 2 sec) of
the START/STOP button (you will hear a 2nd beep).
R
, R
, U
H
S
H-E
2.3.3
Other Measurements
As explained in Step 4 on the previous page, terminals ES (Xv) and E (X) must be
connected to a metallic part of the tower above the GroundFlex
measure the current flowing ISEL downward through the sensor towards the earth
to measure ground resistance of the leg.
If connections ES (Xv) and E (X) are placed below the GroundFlex
latter measures the current flowing towards the top of the tower via the overhead
ground conductor at its top, and you can in this way evaluate the quality of this
overhead ground conductor.
You can even make this measurement without moving the contacts of ES (Xv) and
E (X) on the tower by simply passing the 2 connecting cables through the Ground-
sensor. The current in connecting cable E (X) and the current through the leg
Flex
®
of the tower then cancel each other out.
You can also measure any leakage currents (I-Act) flowing through each leg of
the tower in normal operation of the high-voltage line. If you find different leakage
currents in each leg, but they cancel out when added together, you can conclude
that these currents, induced by the rotating field of the high-voltage lines, indicate
an earthing fault of the tower via the overhead ground wire at the tip of the
mast.
2.4 MANUAL Mode and SWEEP Mode
Use the Hz/OPTIONS button and ► button to change to MANUAL mode. The
following parameters can be modified:
•
128Hz blinks
•
Test voltage blinks Switch between 16 and 32V
You can also perform a frequency sweep and a smoothing.
14
Shop for AEMC products online at:
SEL
, I
will be displayed.
H-E
Change the test frequency
ShopAEMC
www.
, R-Act (R
), U-Act (U
PASS
and its frequency).
SEL
and its frequency,
S-ES
sensor in order to
®
sensor, the
®
GroundFlex
Adapter Model 6474
®
.com
1.877.766.5412
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