Chapter 2 Flashcards
Anatomy
Internally, what are the 3 main components that make up a Transformer?
The core, the windings and the insulating fluid
What else are Transformers equipped with?
Pressure relief valves
What are CSP Transformer equipped with internally?
Fuses
What does the core of a transformer provide?
A path for magnetic coupling of the two windings
What does the core concentrate?
The magnet flux lines, which substantially improves effeciency
What is the core made of?
Thin laminations of gran-oriented silicon steel rolled into layers, with each side coated with an insulating material.
What does the core have a significant impact on?
The wat losses of the transformer
What are the two configurations of a Transformer’s Core?
- Wound Type Core
- Shell Type Core
What does the core type for distribution transformers depend upon?
Manufacturer and the type of transformer
What is the type of steel that’s been recently utilized?
Amorphous Steel
Why is Amorphous Steel utilized?
To further reduce the losses within the core
What is the most popular material for the windings?
Copper
Why is Copper the most popular used material?
Low resistance and superb conductivity
Which typically has smaller sized wire used for the windings the primary or secondary windings?
Primary Windings
What shape might the winding wire take?
Either round or in rectangular ribbon form
What are the winding conductors coated with?
Insulation to to prevent the turns from shorting out
Where are the ends of the windings attached?
To the primary and secondary terminals
What are the secondary winding ends tagged with?
A-B-C-D
Where are the ends of the windings brought out from when attaching them to the primary and secondary terminals?
Brought out of the core and coil assembly
What is the role of the Insulating fluid?
Cooling and insulating the core and coil assembly
How does it facilitate the cooling process?
By transferring the heat generated in the coil and core assembly to the tank or radiators, where it will be dissipated to the outside atmosphere
What happens as the core heats?
The oil rises.
What happens when the oil rises?
It’s forced against the case of the transformer where it radiates heat into the atmosphere and cools.
What happens when the oil cools?
It circulates down to the bottom of the core.