Cast Resin Transformers LS

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.

Moisture proof

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.

No partial discharge

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.

Low noise

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.

High impulse strength

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 free

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