2016 Premier Fence

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Wide vs low impedance output curves (chart above)
6
5
4
3
2
1
0
Output in joules
5,000 2,000 1,000 500 50
drier soils, brown grass
& lighter (in weight) species
moist soils, green grass
& heavier species
Fence resistance in ohms (Ω)
low
wide
3
2
1
0
200
ohms
500
ohms
2000
ohms
3500
ohms
5000
ohms
Energy output
in joules
6
5
4
USA 10.9
Joule Unit
NZD 7.5
Joule Unit
IntelliShock 506,
6.5 Joule Unit
2 miles of
weed-laden multi-
wire permanent
sheep fence.
Typical single-
strand cattle
fence when grass
is green.
Cattle fence
when the grass
is brown.
Graph comparing 2 low-impedance
units with a wide-impedance
energizer—IntelliShock 506
ENERGIZERS & SOLAR PANELS 79
Why animals respect wide-impedance energizers!
Wide-impedance energizers are able to deliver high-pulse energy levels and high voltages
through a wider range of fence situations—including those with high total fence circuit resistance
due to inferior polywire/netting; dry, sandy, rocky soils; dry, brown grass; and fewer ground rods.
Animals have greater respect for and fear of such fences when energized by wide-impedance units.
Energizer Impedance—wide vs low?
1. An energizer’s output is not a constant! The stated number on the outside of the
box is a optimum peak. It’s never more than stated—and almost always much less.
2. The curve shape is important. The chart above shows 2 energizer output curves in
joules. One is a wide-impedance unit with 2.7 joule peak output. The other is a low-
impedance unit with 5.2 joules peak output.
3. Low-impedance units excel when the soil is moist, the grass is green, the animal
is a good conductor and there are plenty of ground rods.
4.Wide-impedance units excel when the total resistance is higher— due to brown
grass, dry soil, the animal is not a good conductor or the total ground rod is less.
5. The higher an energizer’s peak joule output is at 500Ω, the more likely it will be
effective when there is high green-weed contact on the wires close to the ground.
6. The higher an energizer’s output in joules at 5000Ω , the more likely it is to be
effective when the soil becomes dry.
High vs Low vs Wide
impedance energizers
Impedance is similar to resistance.
For energizers it means the level of ohms (resistance)
that matches an energizer’s peak output. If low ohms
then it’s a low-impedance energizer, etc.
The first fence chargers (50 years
ago) were high-impedance units.
Their maximum output (never very
much) occurred when the fence was weed-
free. They could cope with drier soils but
their effectiveness disappeared when a few
green weeds touched the fence.
Most were too small in energy output/
pulse to be effective against difficult-to-
contain animals (sheep, goats, chickens).
The next generation was low-
impedance energizers.
They coped well with high weed contact
but not with dry soils or poor conductors.
They are very effective against low-
resistance animals (cattle, horses, pigs)
standing on moist soils.
Wide-impedance is Premier’s term for
energizers that perform well in both
dry and wet situations.
In dry soils or with animals of high
resistance (goats, wildlife and poultry),
wide-impedance units outperform low-
impedance units of similar output.
• Note when each excelled.
• Note also that the larger low-impedance
unit did better than its low-impedance
little brother in all conditions.
Most low-impedance energizers
IntelliShock and Kube wide-impedance energizers
Low-impedance energizers deliver high pain potentials when the resistance is low (hence their
well-deserved reputation for working well when the soil is moist and the grass is green), but much
less as the combined resistance of the soil, animal and wire rises. Illustrates how the joules of pulse
energy at the end of the fence (and thus the potential pain available to animals) drop as the total
resistance of the fence circuit increases—due to wet soils becoming dry, reliance upon stainless
steel polywire and tape fences, or fencing across sandy/rocky soils.