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A.C. GENERATORS & GENSETS
Prime Mover :
Single/Double cylinder, Air/Water cooled, vertical, four stroke, constant
speed, stationary, compression ignition, handle/push button start diesel
engines form the driving power for the A. C. Generators.
A.C. Generators :
A. C. Generators are self-excited and self regulated in screen protected
drip-proof enclosure. These A. C. Generators are available in single phase
and three phse at 1500 R.P.M. These A.C. Generators are manufactured as per
Indian Standard Specificatons 13364 (part 1) under strict quality control
capable of sustaining 10% over load for one hour in any twelve hours normal
running.
Armature :
The armature cores are of high quality Silicon steel stampings to ensure
minimum energy losses. The armature core is rigidly keyed to a sturdy shaft
and clamped with heavy end-ring.
Body & Ventilation :
The stator frame consists of thick sheet steel which is rounded and
machined for its alignment with endshields. The endshield are of cast iron
with easy ventilation windows on both sides. A balanced and efficient
aluminium fan is fitted with the armature spindle which gives uniform
cooling and long life to the windings. The whole body is based on steel
plates to ensure stability.
Winding & Insulation :
Both D.C. and A.C. windings are of super synthetic enamelled copper wire of
high conductivity. High grade insulating materials are used in winding the
field coils and armature which are then varnished and thoroughly dried.
Winding is of class ``A'' insulation. Voltage regulation is within ± 5
%.
Slip-ring assembly :
The slip-rings are made of specially designed gun metal alloy of
homogeneous texture set in phenolic resinous power to facilitate spark-free
and no energy loss conduction. Brush holders are fitted with insulated
bolts. Positive collection of current is ensured by copper bush flexible and
adequate connecting leads.
Field :
The field consists of four pole shoes built of high quality steel stampings
which are accurately spaced and mounted in the steel body.
Current Wave :
Generator out-put current wave form remains substantially Sino-Soidal under
all conditions and frequency variation is within ± 5%.
Bearings :
Heavy duty ball-bearings of high quality are fitted to support the armature
spindle. The bearings are lubricated with high melting point grease which
helps the A.C. Generators in smooth and noiseless running. Outer bearings
are covered type to prevent dust.
Additional fixtures :
A separate control panel fitted with voltmeter, ammeter/s, switch/es,
blinker/s and fuse-cut-out/s can be supplied on demand at extra cost.
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