Linz E2W DC-K, Operation And Maintenance

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English
and that it is preloaded by a preload spring.
B3/B9 CONSTRUCTION FORM
This construction form allows direct coupling of alternator/welder and drive motor. Please follow the instructions below when
assembling:
1) Clamp the “C” cover on the drive motor, as illustrated in Fig. 5.
2) Apply the tie rod (13) for the axial clamping of the rotor, and screw it tight on the engine shaft end as shown in Fig. 6.
3) Secure the alternator/welder to its cover using the 4 bolts as indicated in Fig. 7.
4) Lock axially the rotor by placing the washer (50), and tighten the self-locking nut (51) using a torque spanner (driving
torque 35 Nm for M8 tie rod and 55 Nm for M10 tie rod and 100 Nm for M14 tie rod) (Fig. 8).
Before placing the nut make sure that the threaded part of the tie rod slides into the rotor in order to obtain
a tight lock. Before assembling verify that the cone-shaped coupling housing (on both alternator/welder
and engine) are clean and in good working order.
B2 CONSTRUCTION FORM (only for E2W13 series)
This type of mounting arrangement too allows direct coupling of alternator to the drive engine. Please follow the instruc-
tions below when assembling:
1) Check that the rotor is positioned correctly, as illustrated in Figure 9A.
2) Remove rotor’s locking components on the non-drive end.
3) Place the alternator next to the drive engine, as illustrated in Figure 9B.
4) Centre and secure the stator to the drive engine’s flange, using suitable screws, as shown in Figure 10A.
5) Centre and secure, using appropriate screws, the coupling to the drive engine’s flywheel working through the air
outlet, as indicated in Figure 10B.
Turn the rotor as shown in Figures 11A and 11B.
After completing the above-mentioned coupling procedures check that the rotor’s axial positioning is correct,
and verify that the expansion allowance between the non-drive end bearing and the axial locking wall is 2 mm.
FINAL CHECKS
After the above mentioned coupling procedures check that the rotor’s axial positioning is correct; and verify
that:
1) expansion allowance between the non-drive end bearing and the axial locking wall is 2 mm
2) brushes are well centred on the slip rings.
4. WIRING DIAGRAMS ALTERNATOR/WELDER E2W DC-K (FIG. 17/A - 17/B - 17/C)
TYPE
WINDING RESISTANCE Ω (20°C)
GENERA
TOR
ST
AT
OR
WELDER ST
AT
OR
AUXILIARY
RO
TOR
NO LOAD LOAD
Ve
xc
.(V)
Le
xc
.(A
)
Ve
xc
.(V)
Le
xc
.(A
)
E2W10 220DCK 1,25 0,037 1,26 25,3 36 1,5 112 4,5
E2W13 300DCK 1,05 0,023 0,76 10,3 32 3,1 82 8,2
E2W13 400DCK
0,372 0,012 0,57 14,0 35 2,5 110 7,9
5. VOLTAGE AND OUTPUT FREQUENCY OF THREE PHASE ALTERNATORS
These welders/alternators are designed to supply tension and frequency as indicated on the label. Standard voltages at 50
Hz are: 400 Volt on three phase socket and 230 Volt on single phase socket. All standard voltages at 60 Hz and other special
voltages are available on request.
6. ROTATING SPEED CALIBRATION AND GENERAL MAINTENANCE
Calibration operations must be carried out by qualified personnel only.
Light deviations during the arc striking when used as welder can depend on the fact that the revolving speed is different from
the rated one. Consider that the outlet voltage can vary almost proportionally to the speed variation.
Operation in particular settings
If the alternator/welder is going to be used within a soundproof generating set, make sure that only fresh air enters in it. This
can be ensured by placing the alternator’s air inlet near the external air intake. Moreover, consider that the quantity of air
required is: 4 m3/min.
Bearings
The bearings of the alternators/welders E2W10 DC are self lubricated and therefore they do not require maintenances for a
period over 5000 hours. When it is necessary to proceed to the general overhaul of the generating set it is advisable to wash the
bearings with a proper solvent, to remove and replace the grease reserve. It is possible to use: AGIP GR MW3 - SHELL ALVANIA
3 - MOBIL OIL MOBILUX 3 or other equivalent grease.
Slip-rings, brush holder and brushes
The set composed by slip-ring, brush holder and brushes is designed to guarantee a long and safe service. Therefore no
maintenance is required for at least 2000 hours of operation.
In case of bad working of the machine with accidental de-energising or irregular current supply, it is necessary to carry out the
following simple operations:
1) Clean slip-ring and brushes and check if their mechanical position is correct.
2) Check the position of the brushes; they must be lean for all their width within the surface of the rings.
3) Check the brushes and eventually replace them if worn.
Diode bridge
A 25A-800V diode bridge is used as standard.
Checkout of three-phase diode bridge
Check out of single diode valves of the rectifier bridge can be executed either with an ohmmeter or with a battery and relative
lamp as described her below. A diode valve works regularly when:
- the resistance, calculate with an ohmmeter, is very low in one sense and very high in the other.
Three phase fixed diode bridge (figure 12)
- with battery and lamp, it is verified that the ignition of the lamp is possible only with one of the two possible connections,
as shown in figure 13: A) Lamp Off; B) Lamp On .
Note for disassembly
Before extracting the rotor from the case it is necessary to remove the brush-holder.