CAST COIL Transformers
Code: USCC
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INTRODUCTION
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| Olsun
Electrics Cast Coil Transformers
employ Glass Fiber Reinforced Vacuum Technology for both High
Voltage and Low Voltage Coils, ensuring the highest quality and
reliability without the possibility of cracks or voids within
the resin system. The main features of the OLSUN Cast Coil
Transformers are: |
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CORE
& FRAME
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| The core is made
of the highest quality, cold rolled, grain oriented silicone steel,
and will be of Cruciform Shape with Step Lap Mitered Joints.
Three legs of core are arranged in a single plane an interconnected
with a yoke. The legs are of circular structure, multiple
step lap, and are carefully interlaced with the step lap yokes.
The core is mitered at 45° and carefully stacked to obtain
low losses, low exciting current and low noise. The core
is insulated on both sides of each lamination, protected against
corrosion and grounded in accordance with required standards.
The frame consists of upper and lower steel channels that holds
the core and coil together. To protect against corrosion
all steel parts are coated. |
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WINDINGS
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Winding
conductors are copper and are insulated with a glass fiber epoxy
resin laminate. Turns are arranged in multiple sections
or layers as dictated by design requirements. Cooling
ducts are strategically placed within the windings to provide
low thermal drop thru sections of insulation and expose smooth
and even surfaces for effective convection cooling. Completed
windings are placed in close tolerance molds and cast under
high vacuum using eposy resin that penetrates and saturates
all portions of the windings. After the molds are filled
with epoxy resin, they are moved into carefully programmed ovens
and the epoxy resin is fully cured. The finished coils
have smooth surfaces to enhance heat transfer to cooling air
and to prevent dirt or dust build up. The complete saturation
and penetration of the resin results in a winding free of partial
discharge well above operating voltages. The epoxy resin
and glass fiber laminate render outstanding mechanical strength
to the winding.
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