The document describes the components and functions of an electrical outdoor substation. It contains: (1) An incoming 11kV feeder that brings high voltage power to the substation; (2) Isolators that isolate circuits for safety during maintenance; (3) Transformers, including power and instrument transformers, that step down the voltage from 11kV to 440V; (4) Lightning arresters that protect equipment from lightning strikes; (5) Circuit breakers, like oil and SF6 breakers, that protect the electric circuit from short circuits and overloads; and (6) Outgoing 440V feeders that distribute power to consumers.

1. ELECTRICAL
OUTDOOR SUBSTATION
11KV/440V
PRESENTED BY
Ari Ram Raja,
II / A sec,
Department of Electrical and Electronics Engineering,
Samayapuram,
Trichy – 12

2. Electrical
substation
▸ Incoming feeder
▸ Isolator
▸ Transformers
▸ Lightning arrester
▸ Circuit breakers
▸ Outgoing feeders
2

3. What is
substation?
Assembly of apparatus used to
change some characteristic of
electric supply
A substation is a part of an
electrical generation,
transmission, and distribution
system
3

4. Single line diagram

5.  ACSR (Aluminium Conductor Steel
Reinforced)
 11kV,50Hz
 Pin type insulator
1.Incoming feeders

6. 2.Isolator
6
 This used to isolation a circuit or equipment
from a source of power.
 Used in incoming and outgoing feeders
Device
 Porcelin, ceramic, china clay

7. 3.Transformer

8.  Mutual inductance
 Instrument Transformer
 Current transformer
 Potential transformer
 Power transformer (step down 11KV/440V)

9. 4. Lightning arrester
9
 Protect the electrical
equipment from lightning
 Tungsten It highest boiling
point, at 5,555 °C
 Distribution class LA
 placed in top of the pole

10. 5.Circuit breakers
10
 This device is used to protect electric circuit from
short circuit and open circuit.
SF6 Circuit
breaker
Oil Circuit
breaker
Reduce the
arc

11. 6.Output Feeder
11
Distribute the supply for consumers
ACSR (Aluminium Conductor Steel Reinforced)
400V, 50Hz
Pin type insulator

12. 12
THANKS!
Any questions?
You can find me at:
▸ Ari Ram Raja A
▸ Nikola Tesla