10 Questions
True or false: Noload tap changers can be operated while the transformer is energized?
False
True or false: Onload tap changers may have up to 33 tap positions?
True
True or false: Dehydrating breathers permit raw outside air to come into contact with the oil?
True
True or false: Silica-gel crystals used in dehydrating breathers are blue in color when dry and turn pale pink as they become moisturized?
True
True or false: Tap changers may only be of the onload type?
False
What is the typical adjustment percentage for each step in a noload tap changer?
21/2%
What is the purpose of dehydrating breathers in power transformers?
To absorb moisture from the air entering the transformer
What color are silica-gel crystals when dry, and what color do they turn as they become moisturized?
Blue when dry, turn pale pink when moisturized
How many tap positions may an onload tap changer have?
33
When can a noload tap changer be operated?
While the transformer is deenergized
Test your knowledge about transformer tap changers with this quiz. Learn about noload and onload tap changers, their typical positions, and safety precautions for operating noload tap changers.
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