Installation; Installation Location; Direction Of Rotation; Protection Degree - WEG G Serie Manual De Instalación, Operación Y Mantenimiento

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4

INSTALLATION

4.1 INSTALLATION LOCATION

The alternator must be installed in easily accessible
locations, allowing the performance of periodic
inspections, local maintenance and, if necessary, their
removal for external services.
The following environmental features must be observed:
 The alternators should get fresh and clean air and the
installation location must allow easy air exhaustion of
the operating environment of the equipment, preventing
air recirculation;

It must be avoided that the alternator aspire the exhaust
fumes of diesel engine, because soot is a conductor for
electricity and shortens the life of the insulation and this
may cause burning of the alternator;

The installation of other equipment or walls should not
hinder or obstruct the ventilation of the alternator;

The space around and above the alternator should be
sufficient for its maintenance or handling;

The environment must be in accordance with the
protection degree of the alternator.
NOTE
For alternators with single bearing, the shaft-
locking device (used to protect the rotor
/stator against damage during transport) shall
be removed only just before coupling it to the
driving machine.

4.2 DIRECTION OF ROTATION

The alternators of standard line G can operate in both
directions of rotation.
The phase sequence is set to the clockwise direction of
rotation (viewed facing the shaft end of the alternator -
Powered Side).
The terminals of the alternators are marked in such a way
that the sequence of terminals 1, 2 and 3 coincides with
the sequence of phases R, S and T or L1, L2 and L3,
when the direction of rotation is clockwise.
In the case of alternators that need to operate in a
counterclockwise direction, the phase sequence must be
changed (if required). It is recommended to check the
rotation direction and sequence of phases required before
the entry into operation of the alternator.
ATTENTION
The wrong sequence of phases may cause
damage to equipment supplied by the
alternator. In the case of parallel operation
with other alternators and / or grid, these
must have the same phase sequence

4.3 PROTECTION DEGREE

It is essential for the proper performance of the alternator
and its durability, that the degree of protection for this
equipment be observed in relation to the installation
environment. The standard line G alternator has protection
degree IP21 (protected against penetration of solid
bodies of dimensions above 12 mm and splash of water
in the vertical).
22 l Installation, operation and maintenance manual – Synchronous Alternator – G line - Horizontal

4.4 COOLING

The fan is fitted to the drive end near the rotor. Air enters
through the non-drive end and goes out by radial
openings in the cover / flange on the drive end.
4.4.1

Flange protection removing

Figure 4.2 legend
1. Flange
2. Flange protection
3. Grille
4. Screw
5. Clamp
.
Air outlet
Figure 4.1: Cooling system
1 2
4 5
Figure 4.2: Flange protection
ATTENTION
The protection (2) between the ventilation grille
(3) and the flange (1) is an integral part of the
package and must be removed when
installing the alternator, so as not to impair the
cooling during the operation. See the
procedure as follow:

Cut the clamps (5) that secure the
protection grille;

Remove the grille and flange protection;

Reinstall the ventilation grille, securing it
with the screws (4).
Air inlet
3
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