What is the purpose of oil in transformer breather?

Working Principle of Silica Gel Breather The oil in the oil sealing cup acts as barrier between silica gel crystal and air when there is no flow of air through silica gel breather.

Why is silica gel placed at the entry to the breather of an oil filled transformer?

The main purpose of this addition is to remove moisture or water vapor content from the air used by the transformer to breathe. The design is simple. The structure consists of a pot filled with silica gel beads that’s built to let air pass through it before the transformer uses it to breathe.

What is purpose of silica gel in transformer?

Most of the power generation companies use silica gel breathers fitted to the conservator of oil filled transformers. The purpose of these silica gel breathers is to absorb the moisture in the air sucked in by the transformer during the breathing process.

How do you maintain breather and silica gel in good condition?

Maintenance of Silica gel Breather Before filling the container with silica gel, clean and dry all parts of the breather. Verify that the oil level in the oil cup is correct or not –correct. Finally ensure that the breather is not choked and is free for passage of air.

When should I replace silica gel in transformer?

When the silica gel is fully saturated, it will no longer absorb atmospheric moisture as it enters the transformer therefore the silica gel must be replaced.

What Colour is silica gel?

The three most commonly available colors for silica gel are white, blue indicating and orange indicating. Indicating silica gels are processed with moisture indicators that change color to show when the product is saturated and needs to be regenerated.

Why does a transformer only work with AC?

transformer work only on ac supply because A transformer needs an alternating current that will create a changing magnetic field. A changing magnetic field also induces a changing voltage in a coil. This is the basis of how a transformer works: The primary coil is connected to an AC supply.

What is the Colour of silica gel in transformer?

Silica gel in the breather will be blue when installed and they turn to pink color when they absorb moisture which indicates the crystals should be replaced.

What is the color of silica gel when recharge is required?

Silica gel blue is an option for controlling moisture which contains cobalt chloride in it. When silica gel absorbs moisture, its beads color change from blue to purple to pink, this indicates that the gel needs to be replaced or regenerated. The reason behind is cobalt chloride.

Does silica gel expire?

There’s no expiration date. The gel packets can be “dried out” when they are full of moisture and reused. Silica gel will absorb moisture from any environment, so a sachet left out in the open will immediately start taking up water vapour.

What happens if silica gel gets wet?

If you totally immerse silica beads in water, they make a popping sound and some of them break apart.

What is the function of silica gel in a transformer?

When moisture in air comes in contact with the silica gel it will change colour. It is used outside the transformer in a breather container which is connected to an opening above the oil of the transformer via pipes. At the bottom of the breather there is an oil reservoir which acts as a one way valve.

What is a silica gel breather?

Silica gel Breather is cylindrical type container which is fitted to the conservator tank through a pipe line which is totally filled with silica gel crystals used for absorbing any moisture present in the air during breathing action of transformer due to expansion and contraction of transformer oil in the transformer.

What type of gel is used in transformer breathers?

Similar to Blue Silica Gel, Orange Silica gel is used in Transformer breathers. Orange Indicating Silica Gel, sometimes known as Yellow Indicating Silica Gel, is comprised of mineral Silicon Dioxide that is purified and processed into a beaded form.

How silica gel breather for transformer connected with conservator tank?

Silica gel breather for transformer is connected with conservator tank by means of breathing pipe. The silica gel breather of transformer is very simple in the aspect of design. It is nothing but a pot of silica gel through which, air passes during breathing of transformer. The silica gel is a very good absorber of moisture.

https://www.youtube.com/watch?v=_fjIgVh13D8