Linz electric E2W10 DC Gebrauchs- Und Wartungsanleitung Seite 9

Casing and covers are made of aluminium alloy which holds out against vibrations. The shaft is made of high-tensile steel.
The rotor is particularly sturdy to hold out against the runaway speed of the drive motors.
It is equipped with a damping cage which allows satisfactory operation even with single-phase, distorted loads. Bearings
have lifelong lubrication.
Operation in particular settings:
If the alternator is going to be used at more than 1000 m above sea-level, a 4% derating per each 500 m increase will
need to be operated. If ambient temperature exceeds 40°C a 4% derating per each 5°C increase will need to be operated.
INSTALLATION AND START UP
The following start up and control operations should be carried ou only by qualified personnel.
⇒ The alternator/welder 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 the prime motor.
⇒ 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 in 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 particular checkup must be carried out using a "Megger" instrument at 500 V. c.c..
⇒
⇒ Normally, windings having resistance to earth ≥1 MΩ are considered sufficiently insulated. If windings resistance is
lower, insulation will have to be restored by drying the winding (using, for example, an oven at 60°-80°C temperature, or
by making circulate through the wiring, a proper value of current obtained from an auxiliary source). It is also necessary
to verify that the alternator/welder's metallic parts, and the mass of the entire set are connected to the earth circuit
and that the latter satisfies any applicable legal requirements.
Mistakes or oversights concerning earthing may have fatal effects.
3. ASSEMBLIG INSTRUCTIONS
Assembling should be carried out by qualified personnel after reading the manual.
B3/B14 Construction Form
B3/B14 construction form requires the use of a flexible coupling joint between the drive motor and the alternator/welder.
The flexible coupling should not originate any axial or radial forces during operation, and need to be mounted rigidly on
the alternator shaft end. Please follow the instructions below while assembling:
We recommend assembly by following the following steps:
1) Apply the flexible coupling and the adaptor on the alternator/welder as shown in Figure 1. When positioning the flexible
coupling, remember that once coupling is over the rotor has to expand itself axially towards the bearing located on the
non-drive end side. To make this possible it is necessary that, after assembling, the shaft end is positioned according
to the cover, as illustrated in Figure 2.
2) Place the flexible coupling on the revolving part of the diesel engine, as shown in Figure 3.
3) Mount the coupling's rubber blocks.
4) Couple the alternator/welder to the drive motor by screwing, with suitable screws, the adaptor to the motor (see Fig. 4).
5) Fix, using appropriate rubber anti-vibration dampers, the motor-alternator/welder 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/welder's non-driving end bearing has the recommended expansion allowance (min. 2 mm.)
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.
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 E2W10 DC (FIG. 14)
TYPE
E2W10 180DC 2,82 0,041
E2W10 220DC 1,46 0,044
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.
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WINDING RESISTANCE Ω (20°C)
NO LOAD
0,65 21,0 97 4,6 95
0,45 25,3 94 3,7 93
LOAD
4,5
3,6