A substation usually contains the following major apparatus:
1. Transformers
2. Circuit breakers
3. Horn-gap switches
4. Disconnect switches
5. Grounding switches
6. Surge arresters
7. Current-limiting reactors
8. Instrument transformers
1. Transformers
2. Circuit breakers
3. Horn-gap switches
4. Disconnect switches
5. Grounding switches
6. Surge arresters
7. Current-limiting reactors
8. Instrument transformers
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