25kW Low-Speed
Appendix 1
Appendix 2
Appendix 3
Appendix 4
Appendix 5
Appendix 6
Appendix 7
Statement from A&C Green Energy
Mark Illustrations
Applications for Use
Structure and Main Property
Technical Parameter
Output Power and Performance Curves
Wind Turbine Features
Generator Body
Tail Furling Mechanism
Safety Rules
Turbine Assembly
Tail Vain Assembly
Tail Beam Assembly
Tail Rudder Assembly
Nacelle Winch Assembly
Braking Push Rod Assembly
Blade Assembly
Tower Assembly
Power Cable Connection
Machine Assembly and Installation
Safety Not for Installation
Installation of Turbine Machine by Crane
Installation Without a Crane (Brace Strut Method)
Electric Connection
Off-Grid System
Grid-Tie System
Checking Before Operation
Checking Output Circuit Line of Generator
Checking Yawing Mechanism and Hydraulic Braking
Checking Electrical Compatibility of the Equipment
Trial Operation
Normal Operation
Normal Shut Down
15m Freestanding Tower Foundation
15m Lattice Tower Foundation
15m Guyed Tower Foundation
Packing List
Wind-Solar-Diesel Hybrid System
AC380V/AC220V Grid Feeding
Bolt Torque (Nm) Sheet
Prior to installation and operation, it is important that you
thoroughly read this manual to ensure proper performance and
For contents described in this specification, A&C Green Energy can not ensure its completeness and
accuracy. For the any installations which lay beyond normal installation sites, A&C Green Energy
will not make any instruction or guarantee.
A&C Green Energy is not responsible for any damage and/or injury caused under the following
* Damage caused by any inappropriate operation
* Damage caused by lightning, typhoon and other force majeure
* Damage occurred after the warranty has expired
Notice: All installation instructions & drawings are valid only within the warranty period.
Note: Proper installation depends on the safety precautions and attention of the installer. Please
follow common sense guidelines for correct operation, technique and installation. A&C Green
Energy will not be responsible for any inappropriate operation which may cause any property
damage or personal injury. All risks will be assumed by the end-user and his designated installer.
Please note: the annual electricity output from the wind generator is determined by the local wind
resources and other factors, such as the installation elevation of wind generator, environmental
temperature, maintenance, terrain and density of periphery buildings. A&C Green Energy can not
make any guarantee for the actual power output and energy generated by the wind generator.
This product specification is a general installation guide only and cannot be used as a special
maintenance guide.
2. Summary
2.1 Information
We have improved this product specification, but at the same time, A&C is improving its
products unremittingly. There may be some undocumented differences between the product you
received and this specification.
Please use original PowerMax+ parts. Do not refit the original assembled wind generator,
otherwise it may void the repair warranty.
2.2 Mark Illustrations
Within this guide, please pay close attention to the following tips and warnings:
Warning: means there are risks that may cause personal injury, or perhaps death.
Caution: means there are risks that may cause wind turbine, equipment or property damage.
Advice: helpful installation & maintenance hints from the manufacturer.
2.3 Applications for Use
Off-grid application: The electricity generated by the wind turbine can be stored into
batteries. Through an off-grid inverter, the DC can be changed into stable AC for off-grid
power supply.
On-grid application: The electricity generated by the wind turbine can be rectified into DC.
Through an on-grid inverter, the DC can be converted into stable AC and feed the local utility
2.4 Structure and Main Property
This turbine is composed of blades, permanent magnet generator, nacelle, tower rod, tail rudder,
electric winch, dump load, electric controller, battery bank, inverter, cable, etc. (see Fig.1)
2.5 Technical parameter
2.6 Output Power and Performance Curves
Output power
Output power
2.7 Wind Turbine Features
2.7.1 Blades: With high tip-speed and lift-over-drag ratios, and a noise of lower than 65db, the
blades have been aerodynamically optimized for better performance. The blades have passed
extensive wind tunnel tests. Made of special purpose gel-coat resin and reinforced FRP, each
PowerMax+ blade set is highly durable and will guarantee safe operation under a wind speed of up to
2 times the rated wind speed. When static, it can resist a wind speed of up to 60m/s. Its wind power
efficiency is higher than 0.4.
2.7.2 Generator Body: Made of strong magnet material, and a good quality shaft, the generator
housing has adopted the F-grade insulation and IP54 protection, as well as a maintenance free design.
All this has contributed to over a 30,000 hour lifespan. The motor shell has been aluminum coated
with power generating efficiency of over 90%.
2.7.3 Nacelle: Made of a welded steel plate with high durability and strength, the nacelle surface has
been galvanized to protect it under such harsh environments as humidity, sand storm, and salty mist.
2.7.4 Tail Furling Mechanism: At a wind speed of over 25m/s, the winch will automatically tighten
the steel rope to adjust the tail rudder; consequently, the turbine will pivot to gradually avoid the
direct wind, slowing down the inherent rotation speed. The yawing angle is adjustable: under a
yawing angle of 45°~60°, the output power can be reduced to half, when the yaw angle is 80°, the
brake trigger attached on the tail pin will allow the braking rod to push the braking clip atop the
motor shaft to slow down the rotation. This rotational speed regulation mechanism can also be
triggered by the manual winch.
Fig 2
3. Safety Rules
Do not allow the turbine to run without a load, or at continual high speeds.
If applicable, check the guyed tower and guy wires regularly to ensure proper tension.
Do not stand under a wind turbine during high winds.
When the wind speed is over 24m/s, manually shut down the wind turbine.
If there is an unprecedented vibration or strange noise being detected during turbine
operation, stop the wind turbine for inspection.
When wiring the wind turbine system, connect the battery bank first, then the output cable of
the generator; in disassembling the turbine system, please disconnect the output cable of the
generator before cutting off the battery line. (See appendix 5)
The switch on the breaker panel should be in the “on” position. This should only be turned off
when the batteries have been fully charged or to protect the system from devastating gusts.
This switch should be touched only when the turbine is rotating slowly.
The battery bank should be kept away from fire, heat, and direct sunlight. Any harmful gasses
from the battery charging and discharging should be exhausted on a timely basis.
Keep the rotor balanced to eliminate any vibration: In the case that the blades become
unbalanced, the wind generator must be shut down for a check. Once the trouble has been
eliminated, the unbalanced torque should be no larger than 0.02N.m.
Do not touch the “off” switch on the breaker panel when the wind turbine
is rotating fast. The electric breaker can only be turned off when the turbine is stopped or rotating
Keep the battery far away from heat or fire. All harmful gas emitted during
the charging process should be discharged outdoors. To prevent a short circuit, please use a well
insulated tool to wire the batteries.
4. Preparation
4.1 Prepare a suitably long 7 gauge cable with a current intensity of around 4A/mm2. If the cable is
rather long, increase the wire gauge properly.
4.2 The installation site should have comparatively both higher average wind speed and weak
turbulence, since these factors contribute to the generator’s annual power output.
4.3 Prepare the foundation based on the drawings provided by your PowerMax+ distributor.
4.4 Check the components with the packing list. If you encounter any packaging discrepancies,
contact your PowerMax+ reseller immediately.
5. Turbine Assembly
5.1 Tail Vane Assembly
Keeping the bracket upward, insert the tail vane into the end of the tail rod and align the 9×φ13
nozzle, finally fix it by 9 sets of M12×45(also nut, flat washer and flexible washer). (See Fig 3)
5.2 Tail Beam Assembly
Fix the rain cover with the 4-M10 nozzle of the tail beam by 4×M10×25 bolts, with a spring
washer. Align the straight beam and bend beam with the tail rod and affix them by inserting 2 sets of
M27×385 bolts with special washer. Put in the nut, but do not tighten. (See Fig 4)
5.3 Tail Rudder Assembly
Hoist the tail assembly (combination of tail rod and tail board) and move it to the end part of the
turbine, align the 2-φ50 nozzle of the tail assembly with the two nozzles of the sphere bearing of
the nacelle ;insert the tail pin into the two nozzles to let the 2-φ18 nozzle on the base of the tail pin
align with the 2-M16 bolt nozzle on the bend tail beam, tighten the M16×30 bolts with washer;
fix the tail pin by 2 sets of round M45×1.5 nut and thrust washer; tighten the 2 sets of M27×385
bolt with stipulated torque, insert the open pin (See Fig 5).
5.4 Assembly of Nacelle’s Winch:
Open the head cover of the nacelle and pass the steel rope with the adjustable knot through the jacket
and PRR tube of the rope fixing disc. Pass the other side of the rope through the orientation pulley.
Tie onto the tension hookup of the extended arm and fix it by a clamp. Close the top cover and screw
shut. (Refer to the Fig 6).
Note: Tighten the rope clamp as shown in Fig 7.
5.5 Braking Push Rod Assembly:
Connect the push rod with the tail pin by using two clamps and 2 sets of M12×40 bolts. The position
of each clamp and push rod should be as shown in Fig 8. Also, as shown in Fig 8, each clamp should
be locked by a thrust bolt. At Last, tighten the 4 inner hexagonal bolts M8, on the upper and lower
sphere bearing. After completion, close and bolt the tail cover.
5.6 Blade Assembly
Place the blade hub onto a horizontal flat surface with the front side of the hub facing upward, to
facilitate the tightening of bolts. The three heads of the blade hub have been marked by A, B and C
respectively, which correspond to the three blades A, B and C. Your PowerMax+ rotor assembly has
been factory-balanced and the marks on the blade hub must match those of the blades. Assemble the
three blades onto the corresponding head of the blade hub based on the markings, (blade A should be
attached to the head A, etc). Place the blade horizontally to align the blade flange and blade hub
together firmly. With the blade’s concave side facing upward, attach the first blade onto the hub by
bolts (tighten the 4 bolts first, diagonally). Afterward, check the blade tip: if the tip position is
horizontal tighten the remaining bolts. If not, dismantle the bolts and reassemble. Attach the other
two blades onto the hub following the same procedure. (Refer to Fig 10)
5.7 Tower Assembly
There are 3 types of towers recommended for use with this PowerMax+ system: freestanding
tower, tilt up tower and lattice tower. The tower length is adjustable, ranging from 15~30m
combined of several sections; generally, each section will not exceed 9m for convenient delivery, for
those towers longer than 18m, it is composed of upper, medium, and lower section. The upper and
medium tower section will usually be connected by a plug, while the medium and lower section can
be connected by a bolted flange.
5.7.1 Plug the upper and middle tower: Plug the upper tower with the medium tower and lay them
onto the ground horizontally, push the two sections axially and combine them firmly by using 2
manual blocks pulling the chain and steel rope (the pulling force of each block should be 1~1.5t).
5.7.2 Connecting the middle and lower tower sections: Put the middle and lower tower sections
together, and let the screw nozzle φ26 of the middle section flange align with those of lower section
flange, insert the high strength bolt M24×50 with the flat washers, spring washers and nuts. Screw on
the nuts diagonally and tighten them by a torque banner with a stipulated torque.
5.7.3 Assembling the working platform: lift the top end of the tower 1m above the ground and place
a support bracket 1.2m from the tower head top. Assemble 5 brackets onto the tower; with each one
being affixed by four M16×40 bolts. Do not tighten them immediately. Assemble the platform,
which is comprised of 3 parts, by using 18 M12×30 bolts (including the nuts and spring washers).
Connect the platform with the brackets by using 15 M12×30 bolts (including nuts and spring
washers). Tighten the bolts of the bracket and platform with a set torque.
Note: the door of the platform should be in line with the maintenance ladder (Fig 11).
5.7.4 Assembling the maintenance ladder: the ladder is comprised of several sections whose
standard unit length is 3m. The ladder of the 15m tower is comprised of 3×3m and 1×2.12m sections,
the 3m section is attached by 3 M16×40 bolts (including nuts and spring washers); those should be
arranged from the top to the bottom. The last section (1×2.12m) should be affixed by 2~4 M16×40
bolts (including nuts and spring washers).
5.8 Power Cable Connection
Open the tower top window, connect the three power cables with the cable terminal inside the tower.
Feed the three cables (10~16mm² in cross section) from the tower foundation up to the cable
terminal inside the top end of the tower, and attach them onto the inside inner wall of the tower by
clasp to hold the weight of the cable.(as the fig 12 show)
6 Machine Assembly and Installation
Assembling the tower on the ground then lifting it up via crane, will take about 2 days for
each tower.
Manually stacking the tower segments piece-by-piece, will take 5-6 days for each tower.
6.1 Safety note for installation
DO NOT install the turbine or tower under extreme weather conditions, such as a thunderstorm,
dense fog, sand storm, or hurricane. The installer should be familiar with the surrounding
environment and must clear any nearby obstacles beforehand. Keep the installation site far enough
from the electrified body. Only allow qualified technicians and professional installers to scale the
erected tower.
6.2:Installation of turbine machine by crane
6.2.1 Installation site Clean up:
Clean up the thread of the feet bolt and the foundation platform. Meanwhile, prepare all the
necessary nuts, flat washers and spring washers needed.
6.2.2 Lift the tower (fig 13):
Hoist the tower by a steel cable (over 15M) by passing the rope through the opening atop the tower,
and put it onto the foundation platform which is ready.
6.2.3 Adjust the Perpendicularity of Tower:
Measure the perpendicularity of the tower by the plumb line (gravity line) method, then adjust the
tower by adjusting the upper and lower nuts, finally tighten the nuts by torque spanner.
6.2.4 Main Machine Assembly
Before hoisting the turbine, fix the tail rudder with the position-fixing rubber block by a steel wire to
prevent any possible damage caused by the unexpected swinging of the tail. Lift the turbine onto the
tower top by crane, and then affix the turbine body to the tower top flange by bolts.
(See Figs 14 and 15)
6.2.5 Generator Output Cable Connection:
Open the maintenance window atop the tower and then affix the three output cables of the generator
onto the cable fixing board inside the tower. (See fig 12)
6.2.6 Turbine Assembly: (Fig 16)
Short connect the three output cables of the generator at the bottom of the tower by electrical tape.
Hoist the hub and blade assembly and position yourself at the front of the turbine body. Position the
hub onto the generator shaft and put in the washer and the M56 nut. Tighten the nut with a torque
of 1500~1700Nm and lock it by a M8×20 screw.
6.2.7 Nose cone assembly: (Fig 17)
Assemble the nose cone by the 12 sets of M12×40 bolts (with flat washers and spring washers)
6.2.8 The assembly of steel rope and braking system inside the tower: (Fig 18)
Affix the winch bracket onto the bottom of the tower by using 4 sets of M12*40 hex bolts, then affix
the winch onto this bracket by M10*40 hex bolts. Finally assemble the stroll switch. Lengthen the
φ6 steel rope based on the tower height, the length should follow the formula: tower height - 5m;
spread stain-proof grease around the connecting part and steel rope inside the winch; connect one
end of the rope onto the winch, pass the other end of the rope through the swing fork into the tower,
and draw it out from the upper window of the tower, connecting with the detachable link chain
beneath the vertical shaft. (See fig 6)
6.3. Brace Strut Lifting Method (when a crane is not available)
This method is suitable in those areas with poor traffic conditions (Fig 18).
6.3.1 By using this method, the maximum wind speed during the installation of wind turbine needs to
be no more than 4m/s;
6.3.2 The bare tower should be erected beforehand (with no turbine being assembled) to check the
state of the equipment, tools and whether the crew is ready for installation.
1. Assemble the tower rod first, and fix it onto the tower base by a gemel, tie the right, left and
rear guy wire onto their respective ground anchor, then tie a soft wire, 16mm (5 gauge) in
cross section and 10m (35 feet) in length, onto the rear guy wire for manual operation. (The
tower being assembled should be straight, if it is bending over, an adjustment is needed).
2. Lay down the holding rod toward the tower and attach it onto the tower base by a gemel, affix
a saddle type iron plate onto the top of the holding rod, then tie four guy ropes onto the
holding rod, with the left and right guy wire being connected with the left and right ground
anchor. Affix the rear guy rope with the hanging ear of the tower rods, to let the two rods
form an approximate 90°angle. The front guy rope of the tower should be connected with the
steel rope of the hand winch.
3. Conduct a trial test of the winch before starting. Pass the steel rope of the winch through the
ground anchor pulley, the movable block sets and fixed block sets, and then tie one head of
the rope onto the base of the winch or ground anchor. Connect the pulley group with the front
guy rope and tie this rope onto the top of the holding pole. While lifting the pole, adjust the
right and left guy rope of the pole to keep the movement of the pole in the same plane. Keep
an appropriate tightness on the guy rope (when a hoister is not available, other equipment,
such as a truck, can be used). Conduct a trial test of the hoister. Pass the steel rope of the
hoister through the ground anchor pulley. Fix pulley and tie one end of the rope onto the base
of the hoister or foundation anchor. Connect the pulley with the front guy rope of the tower
and fix it onto the end of holding bar. Lift the holding bar gradually by hand winch to the
vertical position. During the lifting process, keep the holding bar within the same lifting plane
by adjusting the right and left guy rope, keeping an appropriate tension on the guy rope (other
equipment, such as truck, can be used in the absence of a winch).
4. Straighten the steel rope and pulley group. Pass the steel rope through the ground anchor
pulley and tie it onto the winch horizontally. Start up the winch until the pull rope is taught,
then pause and check all the fasteners and connecting points, as well as the tightness of the
left/right pull rope of holding rod and tower rod respectively. Start up the hoister again. While
lifting, keep tightening the temporary front guide rope of the holding rod continuously by a
hand winch and keep the holding pole and tower within the same plane. Watch and adjust the
tightness of the left/right pull rope at all times. When the tower is at a 70° angle, stop the
hoist. Check and make sure the pulley group has enough back setting allowance, so as to
prevent the movable and fixed blocks from bumping each other. Check to ensure that the
tightening mechanism of the left/right pulling rope is smooth. Adjust the brake of the
bumper/holding soft rope. If there is no safety risk during lifting, start up the hoister to release
the steel rope while holding the temporary front holding rope at the same time. Support the
tower by a 2m wood bracket 4~5m from the tower top.
5. After a trial test of the pole, check the ground anchors, tie point of the steel rope and other
equipment, then begin the final installation.
6. Assemble the nacelle, tail rudder, wind turbine and output cable, as well as the wire of the
winch, and connect the vertical bearing with the tower top in accordance with sections 5.1,
5.2, 5.3 and 5.5.6 of this manual.
7. Short connect the three output cables of the turbine.
8. After the installation, adjust the weight position of the turbine main body to prevent the
nacelle and tail rudder from turning while lifting. Start up the winch to lift the turbine until the turbine leaves the bracket then pause it to see: if
there are any abnormalities in the ground anchors, connection of guy rope and holding rod, the
flexible tower holding rope, temporary guide wire or any other conditions. After this safety check,
start up the hoister again. During the lifting process, keep tightening the front guide rope of the
holding rod, paying attention to the tightness of the right/left guide rope and holding rope. Lift the
turbine slowly by inching the hoister until the tower is at a 70° angle. Holding the front pulling rope of the tower, disconnect the pulley group from the front pull
rope and then tie the front pull rope onto the front ground anchor. Remove the hoister, pulley group,
holding rod and other lifting equipment. Adjust the perpendicularity of the tower against the ground
by adjusting the four pull ropes. Tighten the pull rope properly and tighten all the fasteners with a
stipulated torque. Lock the buckles on the four pull ropes and check that all the connections are firm.
Spread anti-corrosion grease around all the connecting points.
A. Figure 21 shows the turbine assembled onto a tower that has yet to be lifted. The turbine is
supported 2m above the ground by a bracket 4~5m from the tower top; after assembling the
turbine, fold the tail and balance it. (The angle formed by the right side nacelle, nacelle axis line
and tower should be around 60°).
B. Figure 22 shows the angle formed by the tower and ground has exceeded 70°. The hoister should
be driven slowly. Hold the flexible rear holding rope at the same time.
For the assembly of the steel rope inside the tower and brake mechanism, please refer to 6.2.8
7 Electric Connection
7.1 Off-Grid Type Wind Turbine System
7.1.1 System diagram (Diagram refer to Appendix 4)
7.1.2 System Brief
The wind power generator is comprised of equipment converting the kinetic energy of a moving air
mass into electric power. It is widely used in wind-rich areas, where there is no access to a normal
power supply. It is capable of powering the lighting, TV, telecommunication equipment, etc. through
an off-grid inverter for the off-grid power supply application.
7.1.3 Combine the batteries into a “battery bank”, with the “+” pole and “-” pole on both ends of the
battery bank being marked by red and black colors, respectively. The battery line and guide cable
should be 7 AWG. All the wire connecting parts should be fixed by a wire clip to guarantee smooth
electricity transmission. Spread a layer of grease around the wire terminal and wire clip to protect
them from corrosion. Connect the “+” pole of the batteries with the “+” pole output terminal of the
breaker box (controller & Inverter). Connect the black battery wire (“-” pole) to the “-” pole output
terminal of the electric box (Controller & Inverter). These connections must be firm to ensure good
electric conductivity. Connect the three output cables of the generator with the three terminals of the
electric box respectively. There are both DC and AC terminals on the electric box; Connect them
based on the marks. For installation details, refer to the user manual of the controller and inverter.
7.1.4 Upon the completion of proper wiring, let the wind turbine charge the batteries first, when the
batteries have been charged enough for the inverter, the inverter will be ready to supply power.
7.1.5 To guarantee their lifespan, the batteries must be recharged in a timely manner after their
discharging. Please adjust the load based on your local wind condition and output power of the
turbine to prevent the over-discharging and the subsequent damage of the batteries.
7.1.6 The voltage of the batteries should be equal to the wind turbine voltage; the DC output voltage
of the inverter should also match the voltage of the wind turbine. The capacity of the inverter should
be based on the peak power level of the load.
7.2 Grid-Tie Wind Turbine System
7.2.1 System diagram (the system diagram please refer to the fig 5)
7.2.2 System brief
The on-grid wind turbine system consists of the turbine body, on-grid controller, dump load
resistance box, on-grid inverter and the affiliated electric system. Through a controller, the kinetic
energy of the moving air mass will be converted into AC electric power by the wind turbine
equipment. This unstable AC will be changed into DC, and then converted back into stable AC
through an on-grid inverter. This AC power can either be fed back into the power grid or used by the
7.2.3 Connection of the on-grid wind turbine system
Wire the on-grid system based on the user manual of the controller, inverter and wind turbine. The
cabling wire gauges should all be based on the actual controller and inverter selected.
7.2.4 The capacity of the dump load should be 2-3 times of the capacity of inverter.
The wiring diagram in the appendices 4 and 5 of this user manual are only
applicable for the controller and inverter from our company.
For the wiring of the on-grid wind turbine system (refer to appendix 6)
8 Operation
8.1 Checking before operation
8.1.1 Check all fasteners of the blades, rotor, and follow guiding cover, generator with nacelle, outside part of
nacelle and tail vane, ensuring they are tight and reliable.
8.1.2 Check the blade assembly angle to make sure the folding and recovery of tail vane is correct.
Check the tower rod connections and the connections between tower rod and foundation bolts, ensuring the
stipulated tightening torque has been reached.
Rotate the rotor and check that there is not blocking or friction on the generator or hydraulic braking
8.2 Checking output circuit line of generator
8.2.1 Open the right door of the nacelle, checking whether the connection between three output lines
and electric brush are in good condition, tight and reliable.
8.2.2 Using universal electric meter, check the conducting performances between each end and slip
ring to ensure they are conducting electricity.
8.2.3 Check the contact between the three output cables of the wind turbine and the connecting cable;
see if the cable head has been fixed firmly. Eliminate any friction between the cable and steel rope.
8.3 Checking yawing mechanism and hydraulic braking device
8.3.1 Check the connection between the winch and steel rope.
8.3.2 Shut down the turbine machine and crank the winch by hand to see if there is any stagnation
during the folding of tail vane.
8.3.3 Start the turbine; release the winch until the steel rope is loose. Check if the tail will recover its
position quickly. Make sure the turbine can be moved.
8.4 Checking the compatibility of the electrical equipment and wind turbine system
Check that the electrical equipment is properly matched with that of the wind turbine system. Ensure that they meet
all power supply requirements, that their technical state is good, and all line connections are correct.
8.5 Trial Operation
8.5.1 The wind turbine should be shut down before conducting any tests.
8.5.2 Check the wind-facing flexibility of the operating wind generator. When the wind speed is
4m/s, the wind turbine should rotate in response to the changing of wind direction.
8.5.3 When the wind speed is more than 4m/s, the blades should start spinning. Because of the
friction between braking disk and braking slice, when new turbines are first put into operation, it is
normal to have a higher start-up speed. After a short time running, the friction phenomena will
disappear automatically. During the operation period the wind turbine should spin steadily and
without obvious vibration. Check that the three output lines of the generator and their voltage are
equal. When the wind speed is more than the rated wind speed, the rotor should have an obvious
yawing action and the peak value of power output is not more than 1.8 times the rated power in
strong wind conditions. Only after passing the above examination to ensure that all technical
conditions are satisfied, can the wind turbine system be put into daily operation.
1. Upon the completing the wind turbine assembly, operate the turbine system in accordance
with the user manual of the controller and inverter. Monitor and make sure the controller,
battery bank and inverter will work normally. The inverter will power the load or feed the
grid normally.
2. The turbine system may be put into service after the aforementioned check.
It is normal for any new wind turbine system to require a slightly higher start up wind speed.
8.6 Normal operation
1. During the trial operation, make sure all systematic parts are in the normal status and have no
other fault.
2. This system must be operated by specially trained personnel.
3. All operation must obey strict regulations.
8.7 Normal shut down
8.7.1 Automatic shut down: The turbine controller will keep monitoring the output voltage and
current of the turbine. If any of the parameters exceed the set level, the system will automatically
shut down for protection.
8.7.2 Manual shut down: If the turbine needs to be shut down manually, whether for repair,
maintenance or approaching storm, simply trigger the manual dump load switch on the controller to
increase the load of the wind turbine and slow down its rotation speed. Then press the manual
braking button on the controller or operate the winch by hand directly to let the turbine fold its tail
and shut down.
8.7.3 When shutting down the turbine for a long period, the controller and inverter should be
switched off to prevent the over-consumption of electricity stored inside the batteries.
8.7.4 Recovery: The turbine should be restarted by manual winch after it has been either manually
or automatically shut down.
Please switch off the inverter before the controller. For the switch-on
operation, follow the same procedure.
9. Maintenance
9.1 Routine maintenance
9.1.1 Check whether the wind generator is operating smoothly. If any strange vibrations or noises are
detected, stop the wind generator until the problems have been eliminated.
9.1.2 When the wind speed is more than rated wind speed, ensure that the yawing action of the wind
generator is easy and smooth.
9.1.3 Make sure that the 3-phase output is balanced, the power output is in normal condition, and that
the “flow diversion or discharging” is kept unblocked and reliable.
9.1.4 Check that the batteries are being sufficiently charged.
9.1.5 Check that the technical condition of the electric winch is good.
9.2 Maintenance after first 1,000 hours
Check all nuts and bolts, and tighten them in accordance with the stipulated torque.
Checking emphasis is as follows:
• Tower foundation/base bolts
• Linkup flange bolts of tower rods
• Bolts between the vertical shaft flange and the tower top
• Rotor hub nuts
• Blade bolts
• Air flow diversion cover bolts
• Bolts between the generator and nacelle
• Round nut on the vertical shaft bearing
• Main tail pin bolts
9.2.2 Check welding positions of the tower rod to ensure that there are no cracks of flaws.
Checking emphasis is as follows:
• root part
• linkup flanges
• tower top flange
• rotor hub
• tail beams
9.2.3 Check hand-turning and winch-driving tail folding action (tail fold to 45°~60°) to see whether
there are any blocking phenomena. Check whether the tail vane can retract easily after releasing. If
there are any unusual conditions, please ascertain the reasons and eliminate the breakdowns.
9.2.4 Check whether the blade bolts are loose or missed. Check whether the bolts to the air flow
diversion cover are loose or missing. Tighten if necessary.
9.2.5 Check the output circuit lines of the generator. Check the three output lines of the generator to see whether they are attached firmly in
the nacelle. Check the connection between the three output lines and electric brushes, ensuring
they are firmly fixed and that the conducting contact is in good condition. Check the contact between the 6 brushes and electricity conveying slide ring to see if
there are any bad contacts, over heating or burning phenomena. Check the three phase output voltages to see whether they are balanced.
9.3 Checking after strong wind
After suffering the first big wind (>25m/s), re-check 9.2.1, 9.2.2, 9.2.3, 9.2.4, 9.2.5.
9.4 Routine checking & maintenance after every 3,000h operation
9.4.1 Repeat every check and maintenance process detailed in section 9.2.
9.4.2 Check the technical conditions of the rotor. Checking the contour of the blades, with emphasis on the tips and front edges, to see whether
there are any cracks or damage. Check the blades to detect any changes which can result in unbalanced deformation,
translocation or change of setting angle.
9.4.3 Clean the electricity conveying slip ring and electric brushes, polishing the conducting contact
face. Any worn electric brush should be replaced by a new one. The contact area between the brush
and slip ring should reach 95% or more.
9.5 Maintenance
9.5.1 Check the fasteners and graphite brushes regularly.
9.5.2 Check the steel ropes regularly and replace if necessary.
10. Troubleshooting
Possible Reasons
Possible Solutions
Wind speed
is bigger than
4m/s, but the
rotor does
not rotate
1. Setting angle of blades is too small
2. Rotor has not passed a balance
test, or one blade is overweight and
3. Starting resistance torque of
generator is bigger
4. Short cut occurred in the output
circuit of generator, or load has
been accepted in advance
5. Braking mechanism is blocked
and the tower rod is not in vertical
state or the bearing of vertical shaft
is too tight and making the rotor not
face the wind direction
1. Bearing rotating resistance of
vertical shaft is bigger
2. Tail vane does not retract
1. Adjusting according to the design
2. Balance blades in accordance with technical
3. Check the resistance torque of generator,
ascertaining the reason and eliminating the
4. Ascertain the short cutting positions;
Postponing the acceptance of load
5. Ascertain the friction positions and eliminate
the friction phenomena
6. Adjust the tower rod to its vertical state; if the
bearing of vertical shaft is too tight, it should be
adjusted to a rather loose state
1. Setting angle of blades is too big
2. Resistance of generator bearing is
bigger, or the bearing is damaged
3.There is a shortcut in the output
circuit of generator
4. Load is not matched
5.The friction of the braking
mechanism has not been released
1.The blade bolts are loose
2.Water entering the blade, freezing,
rotor lost balance
3. There is damage to blade, causing
power and gravity lost balance
4. Generator, power output circuit
(including electricity conveying slide
ring) is losing electricity current and
5. The vertical shaft bearing of
nacelle is loose or damaged.
6. The bearing of the tail vane is
loose or damaged.
7. Braking mechanism is blocked
8. Wind turbine is rotating in high
speed at yawing state.
9. Wind turbine is rotating in overspeed state
1. Adjust in accordance with the design
2. Check and replace it with a new one
3. Eliminate the shortcut
4. Adjust working voltage, load adding work
5. Ascertain the reasons of the friction &
blocking, and then eliminate the problem.
1. Replace with new bolts and tighten them in
accordance with stipulated torque.
2. Eliminate accumulated water or ice, adjusting
the rotor to balanced condition
3. Repair the blades and rebalance
4. Check whether the three phase output is
balanced; check wire connecters of breaker box
to output wires of generator.
5. Tighten in accordance with the requirement or
replacing it with a new one.
6. Ascertain the friction or blocking positions;
repair and eliminate.
7. Check branch braking pump, braking disk
and braking slices
8. Check braking device and the size of
yawing angle
9. Check the load of controlling box (including
shunt), adjust and track, increase the load
(facing the
wind) is not
The rotating
speed of
rotor is
rather lower
Vibration of
wind turbine
1. Adjust the clearance of bearing or replace the
2. Ascertain the reason and restore the tail vane
to its normal position.
1. The rotor bolts are loose
2. The three-phase power output is
not balance
3. Generator bearing is loose or
4. The bearing of vertical shaft is
5. There is friction in braking
6. Parts inside the nacelle are loose
7. The tail vane bearing is loose
1.The fixing parts of framework and
tail vane are lose
2.Causing resonance owing to over
speed rotating of the rotor
speed of the
rotor is too
high, even
exceeding the
1. Operating without any load
2. Load is too small
3. Yawing action of the rotor is
difficult, adjusting & controlling
action is slow
4. The tower rod is not vertical to
horizontal plane, so as to effect the
normal action of yawing mechanism
5.Yawing angle is not enough
6.The tail vane bearing is blocked
and causing the tail vane to not fold
1. There are breakdowns in
controller, it can not shunt and
unload when wind turbine is over
powering or over speeding
2. Energy consumption capacity of
the shunt—unload device is not
3.Yawing mechanism, braking
system are out of order
There are
in electricity
circuit, the
wind turbine
cannot be
1. Find the loose part, then tighten or replace
with a new one
2. Check generator, control circuit and load;
Ascertain the reason of stoppage and eliminate it.
3. Ascertaining the damaged bearing and
replaced it by a new one
4. Adjusting the clearance
5. Checking and repairing the mechanism, so as
to eliminate the frictions
6. Tightening them to eliminating the loosen
7. Replace new parts
1. Tighten them and eliminating the problem
2. Stop the wind turbine, ascertain the reason;
After eliminating the problem, start the wind
turbine again
1. Stop the wind turbine, eliminate the problem
2. Adjust the matching relationship between
output power of wind turbine and load
3. Adjust the inclination angle to suit the local
wind conditions
4. Adjust the vertical degree in accordance with
the requirement of specification
5. Adjust tail folding angle to 75°~80°
6. Check & repair to eliminate the problem; or
replace it with a new bearing
1.Eliminate the breakdowns of the controller
2.Increase the energy consumption capacity
3.Ascertain the reasons, repair and eliminate the
problem, braking torque must bigger than
Appendix 1
15m freestanding tower foundation
Appendix 2
15m lattice tower foundation drawing (the minimum tolerance pressure of the soil should be over
Appendix 3
15m guyed tower foundation drawing (the minimum tolerance pressure of the soil should be over
Appendix 4
Packing list
Wooden box
Tail vane and tail rod
Soft package
Nacelle and motor
Wooden box
Blade hub
Wooden box
Nose cone, rear cover, tail plate
Wooden box
Wooden box
42 (variable)
Wooden box
Battery bank(optional)
Electric brush
For free
For free
Wire clamp M6
For free
Flexible ringφ10
For free
For free
For free
Steel wire sheath
For free
Vertical shaft M16×70
for free
Blade bolts M16×55
For free
Tool box
1 for each patch
User manual
Stainless steel wireφ6
Accessory Oil seal φ110×φ80×12
User manual for inverter
Appendix 5 Battery gathering Energy, Wind, PV, Diesel hybrid power supply way.
Appendix 6
Power Application AC380V/AC220V
Appendix 7 Bolts Tightness Table (Nm)
35、45 HB101~207
16MnVB、45 HB285~321
40Cr、40MnB HRC35~40
5.6(σs =300MPa)
8.8(σs =640MPa)
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