What is the function of breather in power transformer?

The breather is used in the transformer to filter out the moisture from the air. Breather consists of silica gel which absorbs moisture from the air. Conservator tank present at the top of the transformer which allows adequate space for expansion of oil.

What is a free breathing transformer?

The free breathing transformers are equipped with a cushion under the cover or a conservator to allow the oil to expand, at the temperature variations. As it is not hermetic, the oil is always in contact with the air. Moisture is kept at bay through the use of dehydrating salts contained in special filters (breather).

Which chemical is used in breather?

Explanation: The chemical used in the breather of the transformer is Silica Gel. The function of a breather in transformer is to absorb moisture from air. The silica gel is a desiccant. It has good properties of adsorbing and holding water vapors.

Why oil is used in breather?

Silica gel crystal has tremendous capacity of absorbing moisture. When air passes through these crystals in the breather; the moisture of the air is absorbed by them. 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.

What is explosion vent in transformer?

The purpose of the explosion vent in a transformer is to prevent damage of the transformer tank be releasing any excessive pressure generated inside the transformer.

How does a transformer transform?

A transformer is an electrical device that uses electromagnetic induction to pass an alternating current (AC) signal from one electric circuit to another, often changing (or “transforming”) the voltage and electric current.

Why silica gel is used in transformer breather?

Silica gel crystal has tremendous capacity of absorbing moisture. When air passes through these crystals in the breather; the moisture of the air is absorbed by them. Therefore, the air reaches to the conservator is quite dry, the dust particles in the air get trapped by the oil in the oil seal cup.

What material is filled in breather of transformer?

A breather is an accessory of liquid-immersed power transformers attached to the conservator tank. They serve as the breathing point of the transformer. The breather contains silica gel crystals which have a tremendous capacity of absorbing moisture.

Why do we need isolation transformer?

Isolation transformers provide separation from the power line ground connection to eliminate ground loops and inadvertent test equipment grounding. They also suppress high frequency noise riding on the power source.