Introduction
Great progress has been made in the development and improvement of
distribution transformers over the last decades.
The application of high quality insulation material and suitable selection of the coil
structure for high stress have contribute to the development of LS CAST RESIN
Transformers.
The LS CAST RESIN Transformer has succeeded in combining the advantage
of oil-filled and conventional dry type transformers, which are fabricated with an
epoxy resin. The windings are completely embeded under vacuum conditions.
This casting method makes it possible to assure void-free epoxy penetration of
both the inner layer and turn to turn insulation.
Environmentally safe
LS CAST RESIN Transformers will not emit oil or toxic
gases into the atmosphere. Therefore, they do not pollute
the environment and are strongly recommended as a
replacement for askarel(PCB)-filled transformers.
The complete casting of coils under vacuum prevents the
penetration of moisture into the winding.
Therefore, it is suitable for both storage and operation in
harsh environment and is capable of being switched on
immediately after such storage without pre-drying.
There is no possibility of partial discharge in LS CAST
RESIN Transformers.
Whole core & coil is tested to guarantee the life expectancy
of the insulation system.
LS CAST RESIN Transformers are free of partial discharge
at least up to 1.2 times of the rated voltage.
The coating of the core with an epoxy resin have lead to an
appreciable noise reduction. Noise is also reduced due to
the sound suppresing effect of the step lap cutting.
High overload capability
Based on the high thermal time constant factor of the
windings, LS CAST RESIN Transformers can be overloaded
for a short duration considerably higher than oil-immersed
transformers. It has a greater capability to withstand sudden
high overloads such as might be encountered in heavy
traction applications.
LS CAST RESIN Transformers are very resistant to impulse
voltage.
Impulse withstand levels to 200kV are available because of
careful design and special structure.
Maintenance is almost completely eleminated. No checking
of liquid level and no dielectric test for moisture absorption is
required.
Due to the smooth coil surface, heavy dirt and dust build up
is eleminated even under the worst circumstances.
The recommended routine maintenance is an occasional
visual inspection.
Fire resistant
LS CAST RESIN Transformers have a very excellent
characteristic of self fire-extinguishing and fire resistance.
So there would be no fear of spread of fire even if fire took
place around the electricity room
