Westerbeke 8.0KW-60Hz Service Manual page 60

COLISEUM GENERATOR
DESCRIPTION
The Coliseum (4-pole) generators are self-exciting,
synchronous, brushless models. Brushless excitation is
obtained by electromagnetic transmission of the excitation
power through the air gap of the synchronous exciter. The
generators are single-phase 4 leads at 60Hz and are
manufactured and tesred according to NEMA standards,
ISO standards and IEC recommendations.
'Generator: The generator design is based on a
multilaminared magnetic circuit with salient poles on the
rotor. The rotor is of a special compact construction with an
integral ctamper cage and a field winding section conductor
wound directly on the rotor. A special interpole fixation
combined to the mechanical compactness of the winding
ensures a highly efficient generator ..
Generator Maintenance
• Maintaining reasonable cleanliness is important.
Connections of terminal boards and rectifiers may become
corroded, and insulation surfaces may start conducting if
salts,
dus~
engine
exhaus~
carbon, etc. are allowed to build
up. Clogged ventilation openings may cause excessive
heating and reduced life of windings.
• For unusually severe conditions, thin rust-inhibiting
petroleum-base coatings, should be sprayed or brushed
over all surfaces to reduce rusting and corrosion.
• In addition to perindic cleaning, the generator should be
inspected for tightness of all connections, evidence of
overheated terminals and loose or damaged wires.
• The drive discs on single beiuing generators should be
checked periodically if possible for tightness of screws
and for any evidence of incipient cracking failure. Discs
should not be allowed to become rusty because rust may
accelerate cracking. The bolts which fasten the drive disc
to the generator shaft must be hardened steel SAE grade 8,
identified by 6 radial marks, one at each of the 6 comers of
the head,.
Exciter: The exciter is a six-pole synchronous generator
willi salient poles on the stator and a cylindrical armature on
the rotor. The exciter rotor and the rotating rectifier are
mounted on the shaft with the main generator rotor.
Excitation System: The system is excited automatically by
means of residual magnetism of the magnetic circuits of the
generator and exciter and stabilized by the permanent magnet
in one of the exciter poles.
Winding Connections: The single-phase synchronous
generator has 4 stator leads and can be configured to 120 or
240 volt output.
Bearings: The bearings are sealed type and permanently
greased requiring no maintenance during their working life
(approx. 30,000 hours).
• The rear armature bearing is lubricated and sealed; no
maintenance is required. However, if the bearing becomes
noisy or rough-sounding, have it replaced.
• Examine bearing at perindic intervals. No side movement
of shaft should be detected when force is applied. if side
motion is detectable, bearings are wearing or wear on
shaft of bearing socket outside bearing has occurred.
Repair must be made quickly or major components will
rub and cause major damage to generator.
Carbon Monoxide Detector
WESTERBEKE recommends mounting a carbon
monoxide detector in the vessels living quarters. Carbon
monoxide, even in smaJJ amounts
is
deadly.
The presence of carbon
monoxid~
indicates an exhaust
leak from the engine or generator, from the exhaust
elbow/exhaust hose, or that fumes from the vessels
exhaust or a nearby vessel are entering your boat
If carbon monoxide is
presen~
ventilate the area with
. clean air and correct the problem immediately!
~ WESTERBEKE
Engines
&
Generators
52