patura P20 Bedienungsanleitung Seite 33

Installing and testing an earth system
Select a suitable site for the earth system. Sites need to be:
• At least 10 m (33') from other earth systems (e.g. telephone, mains power or the earth
system from another energiser).
• Away from stock or other traffic that could interfere with the installation.
• At a site that can be easily observed for maintenance.
• Ideally at a site that has damp soil (e.g. a shaded or swampy location). Note that the earth
does not need to be directly adjacent to the energiser installation.
Drive the included earth stake into the ground. Connect the green earth lead of the energiser
to the earth stake.
Often, especially with bad conducting or dry soil more respectively longer earth stakes are
necessary. Continously connect them with the existing earth stakes respectively with the earth
terminal of the energiser. Ensure good contact between the wire and the earth stake.
Energiser
P20 / 0.17 J:
P40 / 0.23 J:
P60 / 0.33 J:
Test the earth system, using the following procedure:
1. Turn off the energiser.
2. At least 100 m (330') away from the energiser, short circuit the fence by laying several
steel stakes or lengths of pipe against the fence. For best results, the fence voltage should
be lowered to 2.000 V or less. In dry or sandy conditions, it may be necessary to drive the
stakes up to 300 mm (12") into the ground.
3. Turn the energiser back on.
4. Using a PATURA digital voltmeter, ensure that the fence voltage is below 2 kV.
5. Check your earth system. Insert the voltmeter's earth probe into the ground at the full extent
of the lead, and hold the hook against the last earth stake. The tester should not read more
than 0.5 kV. Anything higher than this indicates that better earthing is required. Either add
more earth stakes or find a better ground area to drive in the earth stakes. A voltage of
below 0.2 kV would be best.
short circuit
live
live
Earth stake
at least 1 x 0.25 m
at least 1 x 0.65 m
at least 1 x 0.65 m
Energiser
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Energiser
Earth
DVM
Earth