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INTRODUCTION
Subject of these istructions is to give to the
final Users correct operating-conditions about
PTO generator sets, TG series. Therefore, it is
important to read them carefully before
starting up the generator set.
We suggest to keep this manual in a well
protected and easy accessible place in order
to permit a quick consultation when
necessary.
WARNING!
Instructions provided in this manual must be
followed by qualified personel only; moreover
they always must be supplemented by
relevant legal provisions and standards about
safety and accident prevention.
INTENDED USE
PTO generators-TG series are intended
exclusively for electrical equipment to be
connected to the available sockets on your
electrical panel.
The nominal values are reported on a specific
label affixed on the alternator.
Specifications and limitations to such use are
reported in the "Startup"
manual!
INCORRECT USE
– it is not allowed the operation of generators
wherever there is a risk of explosion.
– it is not allowed the operation of generators
in parallel with other generating sets.
– It is prohibited to transit on the electrical
cables that connect the generator to the
equipment in use (pag6 f3.0)
GENERAL CHARACTERISTICS
TG PTO (Power Take-Off) generator set
series provides electrical energy when the
alternator is led in rotation by means of a
mechanical coupling (made using a universal
PTO drive shaft) to a PTO tractor. A gear box
fits the tractor rpm to the alternator nominal
one.
Frequency and voltage depend directly on the
alternator rpm: so, we recommend to keep it
as uniform as possible during all the different
load conditions.
Note that tractor rpm decreases passing from
no-load to load condition: we suggest to set
the tractor rpm (in no-load condition) to a
value slightly higher than the standard one (in
order to get a frequency of approx. 52-53Hz)
to compensate what above mentioned.
It is important that alternator rpm is always
correct: if not, serious damages to the
generator set and the connected equipments
may occur after a long-lasting working time.
Take care to often check the frequency value
during the working period and, if necessary,
adjust it modifying tractor rpm.
All PTO generators–TG series are made with
IP23 degree of protection, or IP44 when
equipped with the appropriate enclosure; the
degree of protection is marked on the label
affixed on the generator.
The operation at full power (intended as
continuous duty S1 in case of IP23, short- time
duty S2 60 minutes in case of IP44) is possible
in a temperature range from -15 ° C to +40 ° C;
for higher temperatures the power should be
reduced by 8% for every 10 ° C increase of the
maximum threshold
PRECAUTIONS FOR USE AND RELATED
INDICATIONS
Rotating electrical machines are potentially
dangerous as they have live and rotating
components,
application of appropriate labels (pag6).
Improper use, inadequate maintenance and
removal/disconnection of protection devices
can cause serious personal injuries or
property damages.
Moreover, after working in load condition the
generator can reach very high temperatures.
With reference to what mentioned above:
– The user must equip himself/herself with
personal protective equipment, in
accordance with the national legislation in
section of this
adopting the Directive 89/656/EEC
– The user should not stand near the cardan
shaft when the set is on; always avoid
wearing work clothes with parts (such as
belts, laces, etc..) at risk of hooking
– The user must use adequate torque limiter
in order to protect the PTO shaft and the
generator from overload as a result of
malfunctions / accidental locking.
PRELIMINARY CHECKS
On receipt of PTO generator set it is
recommended to carefully inspect it to find out
if damages have occurred during transport.
Handle the generator set only using an
adequate hoisting equipment and be careful
during this operation.
HANDLING
The generator is equipped with appropriate
slots on the support frame to allow the
handling by a forklift with adequate capacity
(see f3)
When coupled to the tractor, the user can
handle it on ordinary roads (prior to
appropriate lifting of the generator) only in
accordance with the statements of the
Highway Code in force in the Country.
STORAGE, INSULATION CHECKING
If generator is not immediately installed, it
should be kept indoor, in a clean and dry
place.
Before starting up after long periods of
storage or inactivity or in presence of obvious
signs of damp or condensation, check
insulation resistance among windings and
between each winding and the mass.
This check has to be made by a qualified
techician.
Values should be higher than 2MOhm if
which are marked by the
2
machine is kept at room temperature.
MECHANICAL COUPLING
Please read further on this manual, in the
proper section concerning Installation
instructions.
Generators with brushes: always check that
brushes are properly centred on slip rings.
ELECTRIC CONNECTION
Make sure that the various equipments to be
connected to the generator are in conformity
to the rating data.
Earth the generator set, using an earthbar
and connect it to the suitable terminal on
the tubular frame of the generator set: this
operation must be performed and checked
only by qualified technicians (ground
resistance must not exceed 600 Ohm).
It is necessary to check that all the above
mentioned procedures have been properly
carried out and that no obstacles avoid rotor
rotation before using the generator. Also
check that in no-load condition the voltage
measured on each socket on the electric
board corresponds to the recommended rated
voltage.
The correct execution of the connections
to the user load must be carefully checked,
dedicating particular attention to the fact
that the connection cables must never be
allowed to come into contact with the PTO
generator set during operation.
Warning!: as above mentioned, it is
dangerous to operate the alternator in load
condition at a different rpm than the nominal
value (max deviation: -2%, +5%); this
situation represents an overload condition
and a prolonged working time in such
conditions may create serious damages to the
alternator and the connected equipments.
GENERAL WARNINGS
Make sure that the cooling air inlet and the air
outlet grids are free and unblocked. Alternator
must breath in clean air only: inlet of hot air
expelled from the alternator itself and/or the
coupled tractor must be avoided as well as the
inlet of tractor exhaust fumes, dust and dirt.
The external surface of the alternator reaches
high temperature during work period in load
conditions: take care not to touch it. Even
avoid to put on it jars contening flammable
material. In case of fire, only use a powder fire
extinguisher.
ORDINARY MAINTENANCE
Please read further on this manual in the
proper section concerning Maintenance.
Remember that the alternator has not to be
cleaned using direct or high pressure
water jets (or other cleaning liquids) in
order to avoid that water wets the windings
damaging them.
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