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Idiomas disponibles
Idiomas disponibles
It is equipped with a damping cage which allows satisfactory operation even with single-phase, distorted loads. Bearings are
sealed for life.
Operation in particular conditions.
Should the alternator operate at more than 1000 m above sea-level, a 4% derating every 500 m increase will need to be
applied. Should the ambient temperature exceed40°C a 4% derating every 5°C increase will need to be applied.
START UP
The following start up and control operations should be carried out only by qualified personnel.
⇒ The alternator must be installed in a well-ventilated room. Ambient temperature should not exceed standard recommended
values.
⇒ Particular attention must be paid to ensure that air inlets and outlets are never obstructed.
While installing the alternator it is important to avoid direct suction of warm air coming from the alternator's outlet and/
or from drive engine.
⇒ Before starting up the alternator it is advisable to check (visually and manually) that all terminals in every terminal board
are properly clamped and that the rotation of the rotor is not blocked in any way.
⇒ If the alternator has not been used for a long time, before starting it up it is recommended to test the windings insulation
resistance to earth, keeping into account that every single part has to be isolated from the others. This special test must
be carried out using a "Megger" tool at 500 Vdc. Normally, windings having resistance to earth ≥1 MΩ are considered
sufficiently insulated.
If windings resistance is lower than 1 MΩ , insulation will have to be restored by drying the winding (using, for example, an
oven at 60°-80°C temperature, or having a correct amount of current obtained from an auxiliary source circulate through
the wiring). It is also necessary to verify that the alternator's metallic parts, and the whole genset mass are bonded to
site earth and that the earth circuit satisfies any applicable legal requirements.
Mistakes or oversights concerning earthen may have fatal effects.
3. ASSEMBLING INSTRUCTIONS
Assembling should be carried out by qualified personnel after reading this manual.
B3/B14 Mounting arrangement
The B3/B14 mounting arrangement requires the use of a flexible coupling between the drive engine and the alternator.
The flexible coupling should not cause any axial or radial forces during operation, and shall be mounted rigidly on the alternator
shaft end. Please follow the instructions below while assembling:
1) Fix one of the two flexible coupling halves and the flange to the alternator as shown in Fig. 1A. When positioning the flexible
coupling half, remember that once coupling is carried out, the rotor must be able to move axially towards the non-drive
end bearing. To make it possible it is necessary that, once the assembling is carried out, the shaft end, with respect to the
flange, is positioned according to Fig. 1B , and related table.
2) Place the relevant flexible coupling half on the revolving part of the diesel engine, as shown in Fig. 1C.
3) Insert the coupling's rubber blocks.
4) Couple the alternator to the drive engine firstly by screwing, with suitable screws, the flange to the engine (see Fig. 1D).
5) Fix, using appropriate rubber anti-vibration dampers, the engine-alternator unit to the common bed-plate. Special attention
must be paid not to cause any stretching that may affect the natural alignment of the two machines.
6) Make sure that the alternator's non-drive end bearing has the recommended expansion allowance (min. 2 mm.) and that
it is preloaded by a preload spring.
B3/B9 Mounting arrangement
This type of mounting arrangement allows direct coupling of alternator and drive engine. Please follow the instructions below
when assembling:
1) Fix cover "C" to the prime mover as shown in Figure 2A with the specific M8 screws (tightening torque 25Nm) or M10
screws (tightening torque 40Nm)
2) Fix the alternator to its cover as shown in Figure 2B with the 4 provided M8 (tightening torque 25Nm) or M10 (tightening
torque 40Nm) bolts.
3) Apply the tie rod "13" for the axial securing of the rotor, inserting the washer "50", screwing the self-locking nut "51" and
pulling out the tie rod about 2mm, as shown in Figure 2C.
4) Axially lock the rotor by tightening the tie rod with a torque wrench (tightening torque of 21 Nm for M8 tie rods, 48 Nm
for M10 and 120 Nm for M14 tie rods) as shown in Figure 2D.
Check that the self-locking nut "51" has a threaded portion of the tie rod that enters the rotor thus allowing
a secure locking. Before assembly, check that the coupling conical seats (on the alternator and engine) are
regular and clean.
In the case where there is a threaded reduction sleeve, it must be screwed onto the engine shaft first and then proceed as
shown in sections 1-2-3-4.
B2 Mounting arrangement.
This type of mounting arrangement too allows direct coupling of the alternator to the drive engine. Please follow the
instructions below when assembling:
1) Check that the rotor is positioned correctly, as illustrated in Fig. 3A.
2) Remove eventual rotor's locking components on the non-drive end.
3) Place the alternator next to the drive engine, as illustrated in Fig. 3B.
4) Centre and secure the stator to the drive engine's flange, with the specific M10 screws (tightening torque 40Nm), as shown
in Fig. 3C.
5) Centre and secure the rotor's coupling discs to the drive engine's flywheel with the specific M8 (tightening torque 25Nm)
or M10 (tightening torque 40Nm) screws working through the air outlet, as indicated in Fig. 3D.
Turn the rotor as shown in Figures 4A and 4B.
FINAL CONTROLS
Once all the above-mentioned operations have been carried out, it is necessary to check the correct axial
positioning; it must be verified that:
1) Between the end of the non-drive end bearing and the surface of axial clamping there is a space of:
2 mm for the alternators E1S10
3 mm for the alternators E1S11 and E1S13
2) The brushes are correctly centered on the rotor slip ring.
4. OPERATION
Connecting load cables s should be carried out by qualified personnel when the machine is completely
stopped (locked out) and load cables are disconnected (tagged out).
Voltage and output frequency: These alternators are designed to supply only the voltage and frequency specified in the rating
plate.
5. WIRING DIAGRAMS (Figure 5)
Load cables connections:
The E1S series alternators can work both with star/neutral connection and delta connection. The terminal
board will have therefore to be connected as shown in Figure 9: A=Star with neutral connections; B=Delta
connections.
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