Tru-Test 15 J R, Руководство пользователя

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7
All-live system
Earth-return system
Horizontal stay
Suitable for field gate, high-tension strainer.
Very simple to erect and most suitable as a high tension
strainer, excellent in areas where the soil gets very wet or
where heavy frost occurs.
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 energizer).
•
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 energizer installation.
Drive Tru-Test earth rods into the ground. Use high-voltage,
insulated cable and earth clamps to continuously connect the
earth rods and the energizer's Fence earth terminal. Make
sure the insulation is stripped back to ensure good contact
between the wire and the earth rod.
The number of earth rods used will vary with the soil
conditions. For larger energizers, at least six 2 m (6'6") earth
rods are required. To ensure that an adequate number of
earth rods have been used, test the earth system using the
following procedure:
1
Turn off the energizer.
2 At least 100 m (330') away from the energizer, short
circuit the fence by laying several steel rods or lengths of
pipe against the fence. For best results, the fence
voltage should be lowered to 2000 V or less. In dry or
sandy conditions, it may be necessary to drive the rods
up to 300 mm (12") into the earth.
Note: It is not acceptable to short circuit a fence return
system to the earth wire of the fence.
3 Turn the energizer back on.
4 Using a Tru-Test 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
clip the other lead to the last earth rod. The voltmeter
should not read more than 0.3 kV. Anything higher than
this indicates that better earthing is required. Either add
more earth rods or find a better ground area to drive in
the earth rods.
Notes:
- The Remote Control Handset may also be used to check
voltage. See Using the fault finder on page 3 for more
information.
- When earthing energizers located in dairies, earth at least
20 m (65') away from the dairy using double-insulated
wire, to avoid touching the dairy building or equipment.
Safety considerations
Definition of special terms
Energizer – An appliance that is intended to periodically
deliver voltage impulses to a fence connected to it.
Fence – A barrier for animals or for the purpose of security,
comprising one or more conductors such as metal wires,
rods or rails.
Electric fence – A barrier which includes one or more electric
conductors, insulated from earth, to which electric pulses are
applied by an energizer.
Fence circuit – All conductive parts or components within an
energizer that are connected or are intended to be
connected, galvanically, to the output terminals.
Earth electrode – Metal structure that is driven into the
ground near an energizer and connected electrically to the
Fence earth terminal of the energizer, and that is
independent of other earthing arrangements.
Connecting lead – An electric conductor, used to connect the
energizer to the electric fence or the earth electrode.
Electric animal fence – An electric fence used to contain
animals within or exclude animals from a particular area.
Electric security fence – A fence used for security purposes
which comprises an electric fence and a physical barrier
electrically isolated from the electric fence.
Physical barrier – A barrier not less than 1.5 m (5') high
intended to prevent inadvertent contact with the pulsed
conductors of the electric fence. Physical barriers are typically
constructed from vertical sheeting, rigid vertical bars, rigid
mesh, rods or chainwire mesh.
Public access area – Any area where persons are protected
from inadvertent contact with pulsed conductors by a
physical barrier.