patura P700 Mode D'emploi page 43

Energiser
Earth
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 PATURA earth stakes into the ground. Use high­voltage, insulated cable and earth
clamps to continuously connect the earth stakes and the energiser's earth terminal. Make sure
the insulation is stripped back to ensure good contact between the wire and the earth stake.
The table below specifies the minimum number of 1m (3'3") earth stakes recommended for an
earthing system. Often, especially with bad conducting or dry soil more respectively longer
earth stakes are necessary.
Energiser
P700 / 6.7 J:
P800 / 12.3 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 earth.
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
below 0.2 kV would be best.
Earth return
Earth stake 1 m or longer
at least 3 earth stakes
at least 4 earth stakes
live
live
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