● Major Equipment Used in an Electrical Substation :

 ●●● Major Equipment Used in an Electrical Substation : 

1. Power Transformer - Steps voltage up or down.

2. Circuit Breaker (CB) - Interrupts fault currentand isolation .

3. Isolator / Disconnect Switch - Isolation for

maintenance

4. Current Transformer (CT) - Current measurement & protection

5. Potential / Voltage Transformer (PT / VT) - Voltage measurement

6. Busbar - Collects and distributes power

7. Lightning / Surge Arrester - Protects against

over-voltage surges

8. Protection Relays - Detect faults and trip CBs

9. Control & Relay Panel - Monitoring and cotrol

10. Capacitor Bank/ Reactor - Power factor & voltage control

11. Earthing Systenm - Safety and fault current

dissipation

12. Insulators - Electrical insulation & mechanical support

13. SCADA / RTU - Remote monitoring & control