Owner`s manual

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taken into consideration. When using a Tilt Tower you should consider the extra space needed for the
tower when it is tilted down.
5. Safety
The BWC EXCEL 1 should never be installed close to a power line. We recommend that the tower be at
least 1 ½ times the height of the tower from any power line including any overhead service line bringing
power to your home.
We also recommend that any guy wire anchors be kept away from roads or paths used by vehicles.
D. Wiring
The basic electrical schematic for the BWC EXCEL 1 battery charging system is shown in Figure 12.
The wind turbine alternator produces 3-phase AC, which is rectified into DC in the turbine control box. A
three (3)-conductor wire is needed between the wind turbine and the charge controller. A fused-
disconnect switch is recommended at the base of the tower (as is recommended for the other BWC wind
turbines).
We recommend that the tower wiring be with SO cord. The SO cord’s neoprene jacket will provide good
abrasion resistance. For ground runs we recommend THHN wire buried inside plastic conduit rated for
electrical service. A suitable watertight junction box should be installed at the base of the tower to en-
close the wire connections between the tower and underground wiring.
The recommended wire sizes for the 48 VDC EXCEL 1 wind turbine are shown in Table 3. The listed
distances include the height of the tower.
Table 2: Recommended Wire Sizes for the 48V EXCEL 1
WIRE SIZE
DISTANCE FROM TURBINE
TO CHARGE CONTROLLER
mm
2
AWG METERS FEET
4 12 50 165
6 10 80 265
10 8 130 425
16 6 200 660
25 4 255 840
35 2 320 1050
Note that wire run lengths correspond to performance values estimated by WindCAD. Annual Energy
Output losses of 5% were factored into the WindCAD model to account for energy losses due to wire siz-
ing.
Danger
Wind turbine towers are made of metal,
which readily conducts electricity. If any
part of the wind turbine or tower makes
contact with power lines there is a risk
of electrocution and death.