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ELECTRICAL DESIGN
All standard products have 2/3 pitch main
windings to eliminate the third harmonic.
This serves to lower operating temperatures,
give lower harmonic content and better
waveform, and extend the overall life of the
generator.
Temperature Rise
All ratings and frame sizes are based on
NEMA and CSA Class F and Class H
temperature rises on both the rotor and stator
windings. Ratings for British, German,
French, IEC and all popular marine agencies
are available.
Standby Generator Ratings
Synchronous generators used on emergency
backup power can have temperature rises up
to 25°C above those for continuous
operation. (NEMA MG1 -22.40 and MG 1-
22.84).
Premium Insulation System
All MagnaMAX generators are built with
Class H or better insulation materials. All
standard generators are suitable for
continuous duty at Class F temperature rise
and will give equivalent or better winding
life expectancy to generators supplied with
Class A or B insulation systems operated
within their temperature limits. The
varnishes and epoxies used are synthetic,
non-hygroscopic. Multiple dip and bake
cycles of the main winding, plus a final coat
of epoxy, make the standard winding
moisture and fungus resistant. The
MagnaMAX rotor is wet wound with
thermo-setting epoxy applied between each
layer, plus a final coating of epoxy for
moisture and abrasion resistance.
MagnaMAX generators can be ordered with
an epoxy vacuum pressure impregnated
insulation system as an option. (MagnaMAX
generators with form wound coils include
VPI as standard.)
Power Factor
All standard generators are designed for
operation at rated kVA at 0.8 lagging power
factor but can be operated at rated kVA over
the 0.8 to 1 .0 power factor range.
MagnaMAX Voltage Regulator
The standard voltage regulator is a fully
encapsulated, static types with a solid state
build up circuit. Standard features include 3-
phase RMS sensing, paralleling, adjustable
under frequency protection, and over
excitation protection. The regulator meets
EMI suppression to Mil Std-461B, part 9.
An optional feature is adjustable armature
current limiting. See the regulator manual
for more information.
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