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What is in a substation?
What makes substation work?
Parts of a substation
1. Primary power lines
2. Ground wire
3. Overhead lines
4. Transformer for measurement of electric voltage
5. Disconnect switch
6. Circuit breaker
7. Current transformer
8. Lightning arrester
9. Main transformer
10. Control building
11. Security fence
12. Secondary power lines
Primary and Secondary Power Lines
1. Primary power lines
2. Ground wire
3. Overhead lines
4. Transformer for measurement of electric voltage
5. Disconnect switch
6. Circuit breaker
7. Current transformer
8. Lightning arrester
9. Main transformer
10. Control building
11. Security fence
12. Secondary power lines
Transports electricity into the substation at high voltages and out of the
substation at safe voltages. (Safe for the needs of the community.)
Ground Wire
What do you think a “ground wire” does?
Ground wires prevent user contact with dangerous voltage if electrical insulation fails.
Overhead Wires
1. Primary power lines
2. Ground wire
3. Overhead lines
4. Transformer for measurement of electric voltage
5. Disconnect switch
6. Circuit breaker
7. Current transformer
8. Lightning arrester
9. Main transformer
10. Control building
11. Security fence
12. Secondary power lines
In your own words, write what you think these do.
Transformers
1. Primary power lines
2. Ground wire
3. Overhead lines
4. Transformer for measurement of electric voltage
5. Disconnect switch
6. Circuit breaker
7. Current transformer
8. Lightning arrester
9. Main transformer
10. Control building
11. Security fence
12. Secondary power lines
Transformers
Transformers can be used to vary the relative voltage of circuits or isolate them, or both.
What do you think Transformers do?
Transformers
Transformer for measurement of electric voltage
Current transformer
Main transformer
Disconnect Switch
What do you think a disconnect switch does?
In electrical engineering, a disconnector, disconnect switch or is used to ensure that an electrical circuit is completely de-energised.
Circuit Breaker
What do you think a circuit breaker does?
A circuit breaker is a manually or automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit.
Lightning Arrester
What do you think a lightning arrester does?
A lightning arrester is a device used on electrical power systems and telecommunications systems to protect the insulation and conductors of the system from the damaging effects of lightning. The typical lightning arrester has a high-voltage terminal and a ground terminal. When a lightning surge (or switching surge, which is very similar) travels along the power line to the arrester, the current from the surge is diverted through the arrestor, in most cases to earth.
Control Building and Security Fence
1. Primary power lines
2. Ground wire
3. Overhead lines
4. Transformer for measurement of electric voltage
5. Disconnect switch
6. Circuit breaker
7. Current transformer
8. Lightning arrester
9. Main transformer
10. Control building
11. Security fence
12. Secondary power lines
In your own words, write what you think these do.
Can you list the parts of a
substation and say what they do?
