Overloads
A 10% overload for one hour every six hours
is normally acceptable.
Operation in particular settings
If the alternator is used at an altitude over 1000m above-
sea-level, a 4% de-rating for every 500m overplus must
be applied. If the ambient temperature exceeds 40°C a
4% de-rating for every 5°C overplus must be applied.
Mechanical features
The casing is made of steel, the drive end and the non
drive end side covers are made of cast iron vibration
resistant.
The shaft is made of high-tensile steel.
The rotor is particularly sturdy in order to resist the runa-
way speed of the drive motors.
It is also equipped with a damping cage which permits a
satisfactory operation even with single-phase, distorted
loads.
The bearings have lifelong lubrication.
3. INSTALLATION AND START UP
Only qualified personnel should carry
out the following start up and control
operations.
⇒ The alternator must be installed in a well ventilated
room. The ambient temperature should not exceed
standard recommended values.
⇒ It is important to ensure that the air inlets and outlets
are never obstructed.
When installing the alternator it is important to avoid
the possibility of the direct suction of hot air expelled
from the alternator outlet and/or from the prime mo-
tor.
⇒ Before starting up the alternator it is advisable to
check (both visually and manually) that all the termi-
nals on every terminal board are properly clamped
and that the rotation of the rotor in not blocked in
any way.
If the alternator has not been used for a long time, it
is recommended that the winding's insulation resist-
ance to earth be tested before starting up, taking into
account that each individual part has to be isolated
from the others.
Disconnect the alternator's electronic voltage
regulator before testing the winding's insula-
tion resistance to earth with a megger or other
high voltage instruments.
The high tensions produced by the test instru-
ments could cause damage to the electronic
regulator's internal components.
Windings with a resistance to earth ≥ 1MΩ are usually
considered to be sufficiently insulated.
If the resistance measured is lower than 1MΩ, then
the insulation will have to be restored by drying
the winding (using, for example, either an oven at a
temperature of between 60°-80°C, or by circulating
a suitable value of current obtained from an auxiliary
source through the wiring).
It is also necessary to verify that the alternator's metal-
lic parts, and the earth of the entire set are connected
to the earth circuit and that the latter satisfies any
applicable legal requirements.
Mistakes or oversights concerning the
earthing may have fatal effects.
4. ASSEMBLY INSTRUCTIONS
Assembly should be carried out by quali-
fied personnel after having first read the
manual.
B2 Construction Form
This construction form provides a direct coupling be-
tween the drive motor and the alternator.
1) Check that the rotor is positioned correctly, as illus-
trated in figure 2a.
Fig. 2a
2) Remove the rotor's locking components on the non-
driving end side.
3) Place the alternator next to the drive motor, as illus-
trated in figure 2b.
4) Centre and secure the stator to the drive motor's
flange using suitable screws, as shown in figure 2c.
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