GENERATOR SERVICE AND TROUBLESHOOTING MANUAL — REV. #0 (08/29/23) — PAGE 17
HEAT RISE
Material used in class F and H alternators are non-nutrient
for most known fungi. Another consideration is corrosive
atmospheres such as salt which will attach the outer coating
of winding insulation and may cause premature failure.
Abrasive dust can also impact the insulation.
In dusty and sandy areas the particles can be drawn
through the alternator by the cooling fan. The high velocity
particles can basically cause a sand-blast effect to the
windings and wear away the outer layers of the insulation.
Epoxy type of coating on the insulation is more susceptible.
Care must be given when operating in these areas by
putting lters on the air intake vents.
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