Page 317 - Birkdale Gate & Fencing 2017/18

EARTH STAKES – THE KEY ACCESSORY
Make sure you earth everything properly!
Over 80% of installed earthing systems are inadequate. The minimum number of earth stakes for each particular energiser is given in the tables for the particular energisers.
Most installations only require 1 or 2 earth stakes. Keep area moist for effective earthing.
Monitoring the earth
If the earth system of an energiser is inadequate, current can be measured between the earth stake and the surrounding soil or an electric shock can be felt when touching the earth system. The earthing system of an energiser should be checked at the time of installation and at least once a year with permanently installed energisers (preferably during dry soil conditions).
Earth stakes
3m
3m
Fence lead out
Energiser
Electric fence
Earth con- nection
3m
3m
TEST PROCEDURE
• Shortcircuitthefencebyputting steel posts into the ground approximately 100 m away from the energiser, and lay them against the fence wires. This should lower the fence voltage to 2000 volts.
• Use a digital voltmeter and insert its earth probe into the ground approx. 1m away from the energiser's last earth stake. Touch the energiser’s last earth stake with the measurement contact of the digital voltmeter.
• Thedigitalvoltmeterindicates the earth voltage when the energiser is switched on:
• 0to200volts(0.2kVto0.6kV display): The earthing is perfect
• 200to600V(0.2kVto0.6kV display): The earthing is still acceptable
• Over600volts:Theearthing needs to be improved by adding more and, if necessary, longer earth stakes, thereby increasing the fence voltage and the safety of the fence.
SPARE EARTH STAKE
Additional earth stake especially for small battery energisers; galvanised, 0.65cm long, with handle for easy extraction and
3m cable with 3mm probe connector.
CODE
Galvanised T-angle iron, with stainless steel screw for attaching the earth connection.
LENGTH CODE
SPARE EARTH STAKE
P161700
EARTH STAKE WITH STAINLESS STEEL SCREW
Hot-dip galvanised with stainless steel bolt
EARTH STAKE
1.0m
P161800
1.5m
P161801
2.0m
P161802
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PATURA TOOLS & ACCESSORIES
1– 2 m