A. To provide oxygen inside the tank
B. To cool the coils during a reduced load
C. To arrest flow of moisture when outside air enters the transformer
D. To filter the transformer oil
Answer: C. To arrest the flow of moisture when outside air enters the transformer
Explanation:
Transformer Breather Helps to Prevent Atmospheric Moisture and Reduce Maintenance Costs.
During the breathing cycle of a transformer, it is crucial to prevent atmospheric moisture from entering the transformer, which can contaminate the oil.
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.
Silica gel is used in breather transformers for controlling the level of moisture and prevents it from entering the equipment.
They are mainly useful in protecting the transformer oil from the damaging effects of moisture.
Silica gel blue crystals and orange beads work effectively in this application.