Alfain MEDVED 270-CCL-3000 User manual

ALFA IN a.s. © www.alfain.eu M-WATT 850 User manual EN 01
User's manual
M - WATT
Single phase and Three-phases power generator
270-CCL-3000 250-AVR-1500 350-AVR-1500
420-AVR-1500 500-AVR-1500 600-AVR-1500 850-AVR-1500

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CONTENT:
1. INTRODUCTION.............................................................................................................. 2
2. SAFETY WARNING .......................................................................................................... 3
3. OPERATING CONDITIONS ............................................................................................... 4
4. DESCRIPTION AND EQUIPMENT ARRANGEMENT ............................................................... 5
5. SPECIFICATION .............................................................................................................. 5
6. OPERATION .................................................................................................................... 5
7. MAINTENANCE ............................................................................................................... 8
8. STORAGE OF EQUIPMENT ............................................................................................... 9
9. TRANSPORT OF EQUIPMENT ........................................................................................... 9
10. FAULTS AND NONSTANDARD STATE .............................................................................. 10
11. WARRANTY AND POST-WARRANTY REPAIRS .................................................................. 10
12. WARRANTY .................................................................................................................. 10
13. SERVICE BOOK ............................................................................................................. 11
1. INTRODUCTION
Dear consumer,
Company ALFA IN a.s., thanks you for purchasing our product and believe, that you will be satisfied
with our equipment. Congratulations on choosing a professional equipment for independent power
generation based on the P.T.O. drive. This equipment is designed for demanding applications, and it
is made from the highest quality components according to strict quality management system, certified
according to ČSN EN ISO 9001. With the combination of professional P.T.O. connections, top of
alternators LINZ, professional electrical and mechanical design and careful craftsmanship and
assembling process, you get a equipment, which is ready for a long-time, demanding and dynamic
operation in standard or nonstandard working conditions.
We reserve the rights of adjustments and changes in case of printing errors, change of technical
parameters, accessories etc. without previous notice. These changes may not be reflected in the
manuals for use in paper or electronic form.
Advantages of P.T.O. power generators series M-WATT:
 powerful maintenance free alternators
 fixed mounting of generator in one constructional block
 solid, ergonomically designed tubular frame
 the possibility of long-term full load
 the possibility of customization
 single-phase and three-phase operation (1 x 230/ 3 x 400 V)
 protection against long-time overload current
 service background

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2. SAFETY WARNING
To ensure safe operation, please read carefully the following precautions and conditions. The following
safety precautions and conditions must always be observed, when handling the equipment device and
during its operation. Ignoring of WARNINGS may cause injury or property damage. Ignoring of NOTES,
CAUTION may also cause equipment damage, reducing of its performance or worse operating
performance.
Photos in text are for illustration only.
WARNINGS - are used for indication of the risk, which in the case of ignore can cause
minor or serious injury or death of operators, present persons and damage of property.
NOTES - are used to notify important information for the installation, operation and
maintenance of equipment.
WARNING! RISK OF FIRE AND EXPLOSION!
Flammable and explosive gasoline can cause fires or serious burns.
WARNING! RISK OF ROTATING PARTS!
Rotating parts may cause several injuries.
Do not touch or keep a safe distance of the hands, feet, hair and other body parts, clothing, tools and
working materials from rotating parts to prevent injury. Never operate the equipment with any cover,
canopy or guards.
WARNING! RISK OF BURNS!
Do not touch the equipment when it is in operation or when it just stopped.
Parts of the machine may be hot during operation (especially the exhaust, engine block, body
generator, cover of muffler, frame machines for exhaust). Do not touch these hot parts while the
engine is running or immediately after stopping to prevent several burns. Never operate the equipment
with any cover, canopy or guards.
WARNING! RISK OF CHEMICAL BURNS!
Electrolyte of battery for devices equipped with an electric starter contains sulfuric acid. Prevent skin
contact with electrolyte.
WARNING! RISK OF ELECTRIC SHOCK!
Do not touch electrical wires and parts of the equipment, when it is in the operation.
Electrical appliances can be connected and disconnected from the generator in the switched OFF mode
only. Do not modify electrical system of the equipment. Do not operate the equipment, if it is damaged
or in case of any suspections of internal damage (eq. after flooding equipment, mechanical damage).
Risk of electrical shock.
WARNING! RISK OF POISONING BY EXHAUST GASES!
Exhaust gases contain substances, which in the case of inhalation, can cause serious intoxication or
death and also contains substances considered as carcinogenic and teratogenic. Make prevention of
exhaust gases inhalation and never run the engine in closed or poorly ventilated areas.
WARNING! RISK OF INJURY OF CHILDREN AND INCOMPETENT PERSONS!
Keep out of reach of children or incompetent persons. The equipment must be operated by qualified,
knowledgeable person according to the manual. It is prohibited to operate the equipment by children
under 15 years.

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Winding of the alternator is not connected to the ground. It is separate isolated system power supply.
This ensures the safety of the device with respect to the possibility of injury to the operator an electric
shock. It is strongly prohibited to earth some of working conductor in generator electrical circuit,
except of cases, where electrical circuit is equipped with residual current breaker with tripping
sensitivity 30 mA. These installations must be carried out by a specialist with electro qualifications
only.
Residual current circuit breaker will provide safe operation and protects the operator in the event of
damage of the insulation of alternator and power supplied appliances. Residual current circuit breaker
disconnects the electrical circuit in the event of a discrepancy between the electrical force-output of
alternator and parts of the circuit connected to ground at the output from the circuit breaker.
Must not be connected together conductors PE and N to final one conductor PEN!
3. OPERATING CONDITIONS
 COMPLIANCE WITH NATIONAL SAFETY STANDARDS. The device is manufactured in
compliance with European safety standards. May not be fully complied with any national
standards.
 Devices must be operated at maximum tilt 15 degrees from the horizontal position.
 The machine must be protected from humidity and rain, chemically aggressive areas,
mechanical damage, excessive overloading - exceeding the tech. parameters and to uncareful
handling.
 OVERLOADING. Each user must know the maximal nominal power output of power
generator, which must not be exceeded. Generator is equipped by a thermal fuse for
voltage 230V, which serves as a protection against long time overloads. If the power output is
interrupted during the use, it can be caused by breaking off the fuse due to long time
overloading. In this case, wait a short time period, and then solve the reason of overloading
and switch-on the fuse again by pressing the button located near the sockets. Thermal fuses
have values corresponding to each type of power generator. In case of the replacement, use
original spare parts. Thermal fuse cannot secure short time strong overloading
repeatedly, which is exceeding the nominal power output of generator. It can cause
serious damage of the alternator, for which the manufacturer takes no
responsibility.
 During the connection of electrical machines and devices to the generator, is necessary to
respect technical parameters of power generator and connected electric devices. In case of
any doubts, please contact your dealer or the manufacturer of power generator.
 Below mentioned coefficients, determines the approximate multiple exceeding of the label-
nominal power of powered devices, which may occur in short-time during the operation,
especially during start-up of the equipment. Most of devices has a coefficient 1 except of below
shown in the table (the list is not complete; it is indicative only).
The connected powered device Coefficient
Pressure washers 3
Fridge 3,5 -5
Concrete mixers, angle grinders, circular saws 2,5
Machine tools and electric grinders 2
Submersible pumps 3
Washing machines 4
Compressors 3,5-5
Drilling and milling machines 3
Halogen lamps and fluorescent lamps 1,5
Crushers, grass trimmers, brush cutters, fence cutters, mowers
and chain saws 2
 All interventions into el. equipment, as well as repairs must be performed by authorized
personnel. only

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4. DESCRIPTION OF THE EQUIPMENT
5. SPECIFICATION
Electrical
output 3F
[kVA]
Voltage
regulation
P.T.O: min. required
power/torque
[HP/Nm]
Revolution of
P.T.O. @f =
50 Hz [min-1]
Total
weight
[kg]
Max.
current
[A]
Oil in
gear box
[1]
M-Watt – three phases alternator, 3000 ot./min.
MW 270-CCL-
3000 27,0 capacitive/ compound
33/550 429 186 39 0,5
M-Watt - three phases alternator, 1500 ot./min.
MW 250-AVR-
1500 25,0 automatic 31/520 429 255 36 1,0
MW 350-AVR-
1500 35,0 automatic 43/720 429 242 51 0,8
MW 420-AVR-
1500 42,0 automatic 50/840 429 310 61 0,8
MW 500-AVR-
1500 50,0 automatic 60/1000 429 360 72 1,2
MW 600-AVR-
1500 60,0 automatic 72/1200 429 377 87 1,2
MW 850-AVR-
1500 85,0 automatic 102/1700 429 480 123 2,4
6. INSTALATION AND OPERATION
The power generator is electrical equipment, which must be handling, installing, putting into operation
Sockets
Alternator
Tube frame
P.T.O. connection

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and checked by qualified persons only.
The power generator is mechanically connected by P.T.O. to the other machine. The responsible
person (operator) must ensure surrounding area of all rotating and electrical parts during the operation
against to unsafe contact of any natural persons.
Conditions for connection of power generator to the three phases
electrical circuit 3 x 400/230V as backup source of current.
It is necessary to ensure at least following conditions, in case of connection of power generator to the
three phases electrical circuits as backup source of current:
The connection must be carried out by technician with electrical qualification only, who
also has appropriate knowledges concerning of the project (site).
 Circuits connected to power generator must be safely separated from the grid and
other possible source and circuits of current, which are not subjects of the
backup.
 The power generator can be connected by five conductors - three phases circuit by separate
wire PE and wire N..
The connection to old four conductors – three phases installation (with PEN wire) is possible,
but after making of necessary changes in back up electrical circuit, which are necessary to
consult with the producer of the power generator.
 The power generator must be connected to the backup circuit via it’s circuit breakers. Their
over current and short circuit current protection functions must be ensured.
 The connection of power generator to circuit must be always realized by five
conductorquetors cable only (3 phases + Neutral wire + PE wire). If, this condition is not
fulfilled:
o it will cause wrong function of residual current circuit breaker
o increase the risk of electric shock by current
o will rise a risk of damage of appliances connected to the backup system circuit.
 The power consumption of the connected appliances, must not exceeded the power output
of the used power generator. ( Other conditions follow valid local standards)
Notice:
The conductors PE and N, must not be connected together to final PEN conductor!
Please call to the producer of power generator in case of any doubts.
Procedure before the first start
 read this instruction manual carefully
 remove information labels from the device pack
 remove all parts of the transport packing
 check the oil level in the gearbox (transmission), and fill up
 check visually the surface of the device and make sure that the equipment is not damaged
 check, that all safety features and covers are installed properly and are securely tightened
 check, whether the connected devices are switched off and unplugged
Procedure before any further start
 check visually the surface of the device, make sure that the equipment is not damaged
 check, that all safety features and covers are installed properly and are securely tightened
 check, whether the connected devices are switched off and unplugged

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Check before the first start:
 that, safety cover of P.T.O. is correctly connected and without any damages.
 the generator shaft and P.T.O. connection is correctly aligned with the tractor drive unit
 all joints are perfectly fixed and secured.
The wrong fixing of power generator to the ground, can cause it’s overturning and
can make serious injury of the operator.
 The gearbox must be filled with oil (0.5 l) before the first start and oil must be changed after
the first 50 operating hours. After this period, the oil level must be periodically checked. The
oil level should be near the centre line in the version with checking window. In the version
without a checking window, release the lower cover until the oil starts flow out. Release top
and bottom cover of gear box for the faster oil change. Use only SAE 90EP gear oils. For the
disposal and collection of used oil, please contact specialized centres only and follow the
relevant regulations of your country.
 Check, that all connections are ok (fine) and there is nothing to breaks the rotation of
moving parts.
 Follow the appropriate safety standards for electrical connections. Check, whether the label
data of the power generator are in compliance with the characteristics of the connected
device. Make sure, that the maximum permitted nominal load of the individual outlets are not
exceeded.
Ground the machine by using a grounding pin, clamped to the shell of the structure.
 Check, that the switches are in the OFF position and all mechanical guards and
protections are installed correctly, ready for operation as well as on the generator
and on the tractor.
 It is recommended to measure insulation resistance of the power generator in case, that it is
not in long time operation.
User instructions for putting into operation
Rotating electrical genset contains danger parts, partially under voltage, so in case of:
- improper use
- removal of protectors (covers) and elimination of fuses and circuit breakers protection
functions
- lack of checks and maintenance
it can cause a lot of property damages or injuries of persons.
Therefore, any handling with the electrical or mechanical parts requires the qualified specialist.
During all stages of disassembly, maintenance, lubrication and assembly of the P.T.O. connection
(P.T.O. protective rubbers), the personal safety of the operator must be ensured together with rules
of accidents prevention.
Steps of putting into operation:
1. Tightly connect the power generator to the tractor by 3 connection joints with using of pins
and plugs. Possible faults in installation, can cause serious damage of property or injury of
persons, for which is the designer not responsible.
2. . Secure the P.T.O connection ring between the generator and the tractor in the turned
off mode and make sure they are perfectly connected. There cannot be any vibrations,
when the machine is running at idle or at full power.
3. Make sure, that the generator frame lies firmly on the ground. Never switch
ON the generator in an elevated position. Vibrations can cause malfunction of the
alternator and can rise risk of injury.
4. Start the tractor, engage the generator drive and progressively increase the revolution till
reaching of frequency 52 Hz (shown on the display) without loading.
5. Connect plugs to the corresponding sockets.
Notice:

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- Make sure that equipment connected to power generator socket has suitable
voltage.
- Make sure, that loading power is suitable
- Make sure, that there is nobody around rotating parts of the power
generator and tractor.
6. Turn ON switches, circuit breakers and activate current protections.
7. Contact with rotating parts, can caused many of accidents and injuries.
It is strictly prohibited to stand beside of the P.T.O. connection when the
machine is running. Make sure, that nobody is too close of moving or electric live
parts, while the alternator is running.
Switching off and stopping
1. Turn OFF connected appliances (begin with lowest load)
2. Turn main switch to position OFF.
3. Stop tractor engine and disconnect plugs from sockets
Warning:
If, the permissible speed of the power generator is exceeded, the engine or alternator can be
damaged.
7. MAINTENANCE
CHECKS
Please follow below steps to check oil level or for adding of the oil to the gear
box:
1. unscrew and remove caps from holes
2. fill in oil via top hole (A) till the oil starts escape from hole(B).
3. screw caps back to holes
MW 270-AVR-3000
Alternator with brushes – lifetime of brushes app. 2000 hours
MW 250-AVR-1500, MW 350-AVR-1500, MW 420-AVR-1500, MW 500-
AVR-1500, MW 600-AVR-1500, MW 850-AVR-1500
brushless alternators
MAINTENANCE - schedule
Never work on the running power generator, either with your hands or with tools. Before
realization of any maintenance, make sure, that the power generator is stopped and
disconnected from the tractor or the tractor is turned off and the ignition key is removed
and all switches are in the OFF position.
 If there is any malfunction on the machine, make sure, that the reason is not caused due to lack
of routine maintenance.

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 Mechanical checks:
- Check once a month or whenever during each start of the machine, for any unusual
noises or vibrations. Check that the alternator air inlets are not blocked.
- Check the oil level in the gearbox periodically. Change the oil after every 500 hours of
operation or at least once a year.
 Electrical checks:
 Functionality of the circuit breaker – monthly or anytime when machine is turn on by pressing of
test button (circuit breaker must switch off). Also check status of earthing.
 Check wear of rotor brushes and measuring devices functionality – every 500 operating hours or
one time a year.
Note:
 Never wash the power generator with direct or high-pressure water jets or with the help of
aggressive cleaners.
 Never leave containers with liquids or flammable materials on the power generator surface.
 Keep the machine away from sources of heat or moisture and never install it in explosive areas.
 In case of fire, use a powder fire extinguisher
Service interventions, excluding interventions described in this manual, must be realized by an
authorized service partner.
The generator does not require any service or maintenance interventions from the customer side.
Description of protection functionality
The circuit breaker can switch off in two cases:
 If, there is higher current from connected equipment, then adjusted current value of circuit
breaker. Solution: - decrease overcurrent value under current value of circuit breaker
 During short circuit current in electrical circuit – resolve short circuit
The residual current circuit breaker can disconnect the electrical circuit in case of its insulation
damage. This protection (together with earthing) ensures best protection to shock touch.
In case of necessity of additional service actions, please contact your service partner.
8. STORAGE OF THE EQUIPMENT
The equipment can be stored in standard stock according to standard storage conditions. Temperature
+5 - 40°C, humidity <95%, it is suitable to store the machine on a dry surface.
9. TRANSPORT OF THE EQUIPMENT
The device can be transported in a horizontal position only, to prevent leakage of oil. Use appropriate
lift equipment with enough lifting capacity for handling of the equipment. Protect transport package
from mechanical damage, rain and humidity influence. Store the equipment on dry, clean place
protected of humidity. It is recommended to measure insulation resistance of the equipment in case
of long time switch off position of the equipment.

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10. FAULTS AND NON-STANDARD STATUSES
In case, that any failure or non-standard status will appear:
 first check the simplest reasons according to below recommendation shown in the table.
 In case, that a fault or status is not shown in the table, or if it is not possible to solve it, by
these recommendations, please contact your service partner.
 Note: Don’t repair the equipment by your selves, which are not subject of standard inspection
and maintenance routine.
Possible
reason
Trouble
Wrong oil level Overload
equipment
Dirty air
channels
Overload
alternator
Wrong fitting of
covers
Loses power X X X
Powered
irregularly X X
Strange noises X X
Overheating X X X
No current at the
output X X
Repeated failures
alternator
protection
X X
11. WARRANTY AND POST-WARRANTY REPAIRS
Warranty and post-warranty repairs are provided by the manufacturer or a local authorized service.
12. WARRANTY
We guarantee to our customers, that the original equipment of brand MEDVED, is and will be free of
manufacturing defects of materials and workmanship in period of two years from the date of purchase
in case, that it is operated in accordance with this user manual and other documentation provided
together with the product and under appropriate operating conditions and with standard using. In the
frame of this warranty is provided free of charge any service support, except of service of damaged
equipment caused by improper handling or operation in improper operating conditions and except of
spare parts, which are subject of standard change (filters, spark plugs, fuel, oil, etc.). All warranty
repairs must be carried out by the manufacturer or a certified service partner. All unauthorized repairs,
interventions and change of the equipment made out of the periodic maintenance and over warranty
conditions, will cause to loss of warranty. All warranty rules regarding the appropriate operation of the
equipment relating to the final consumer, (and not mentioned above) are governed by the actual law
of the Czech Republic and other relevantly related regulations.
13. SCRAPPING OF THE MACHINE
If the machine has to be scrapped, proceed as follows:
 drain the oil from the over gear and dispose of it as for old oil
 separate the plastic parts from the metal parts and have them collected by authorized disposal
companies.

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14. SERVICE BOOK
Interval
Activities
before every start every 500 hours of
operation or yearly
Presence of excessive vibration x
Transmission oil level check x
Electric connection check x
Rotor brushes wear check x
Transmission oil exchange x
RECORDS OF POWER GENERATOR SERVICE CHECKS
Activity
Presence of excessive vibration Transmission oil level check Electric connection check Rotor brushes wear check Transmission oil exchange
Signature of
technician,
firm,
stamp
Date: