This document provides an overview of a presentation on a 33/11 kV substation. It discusses key components of the substation including transformers, busbars, distribution transformers, current and potential transformers, protective relays, circuit breakers, capacitor banks, insulators, metering instruments, lightning arrestors, and isolators. The presentation also includes a single line diagram of the substation layout.

1. A PRESENTATION
ON
SUMMER TRAINING FROM SHIRBHAVI,
SANGOLA 33/11 KV
SUB-STATION
PRESENTED BY:
PHADTARE RAVI DATTATRYA
ROLL NO.- 21
SUBMITTED TO :
MR.PATIL J. B
( PROF. EE DEPT)

2. CONTENTS:
 SUBSTATIONS
 BUSBAR
 TRANSFORMER
CURRENTTRANSFORMER
POTENTIALTRANSFORMER
DISTRUBUTIONTRANSFORMER
 INSULATORS
 PROTECTIVERELAY
 CIRCUITBREAKER
 CAPACITORBANK
 METERING AND
INDICATING
INSTRUMENT
 LIGHTENING
ARRESTORS
 LINE ISOLATOR
 SINGLELINEDIAGRAM

3.  SUBSTATION
A Station is a subsidiary station of an electricity generation,
transmission,& distribution system where voltage is transformed
to high to low or the reverse using transformers.
A substation generally have switching, protection, &
control equipment & one or more transformers.
 CONSTRUCTIONAL FEATURESOF 33/11KV
SHIRBHAVISANGOLA,
In this substation the power is coming from two lines
namely
440V SHIRBHAVI

4.  33/11 KV Yard

5.  BUS BAR
 A Bus bar is a conducting bar that
carries heavy currents to supply
several electric circuits.
 Bus bar is made from ‘Cu’ and ‘Al’.
TYPES OF BUS BAR-
 Main Bus Bar
 Auxiliary Bus Bar
 One Bus Bar is Main Bus Bar
and another is Auxiliary Bus
Bar.

6.  TRANSFORMER
 A Transformer is a static device that transfers Electrical energy
from one Electrical circuit to another Electrical circuit by means of
a common Magnetic Circuit.
TRANSFORMER USED IN GSS
 DISTRIBUTION X-MER
 C.T.
 P.T.

7. ding
)
 DISTRUBUTIONTRANSFORMER
 To step-down the voltage and
transfer power from one A.C
voltage to another A.C Voltage at
same frequency.
MAIN PARTS
OFPOWER
TRANSFORMER-
Winding(H.V winding , I.V winding)
Core
 Tap changer
Conservator Tank
 Buchholz Relay
 Dehydrating Breather
Oil Temperature Indicator

8.  CURRENT TRANSFORMER
 Current Transformer:- A C.Tis
used to step down current
for measurement, control
and protection.
 Current Transformer is an
instrument transformer used
to protection & Metering of
high values of current.

9.  POTENTIAL TRANSFORMER
 Potential Transformer:- Potential Transformer are Instrument
Transformer. A P.T is used to step down voltage for
measurement, control and protection.

10.  INSULATORS
 transmission lines, In order to
avoid current leakage to the Earth,
 through the supporting structure
provide to the
conductor of overhead
insulators are used.

11.  PROTECTIVE RELAYS
 A protective relay is a device
that detects the fault and
initiates the operation of the
C.B. to isolate the defective
element from the rest of the
system
 The relay detects the abnormal
condition in the electrical circuit
by constantly measuring the
electrical quantities, which are
different under normal and fault
conditions.

12.  There are several metering and indicating Instrument (e.g.
Ammeters, Voltmeters, energy meter, etc.) installed in a
Substation to maintain which over the circuit quantities.
 The instrument transformers are invariably used with them
for satisfactory operation.
 Metering and Indicating Instruments

13.  CIRCUIT BREAKER
 A Circuit Breaker is an automatically or
manually operated electrical switch
designed to protect an electrical circuit
from damage caused by overload
or short circuit.
TYPES OF CIRCUIT BREAKER-
which is used in 33/11kv substation
 oil circuit breaker

14.  Capacitor banks are used to
improve the quality of the
electrical supply and the
efficient operation of the
power system.
 Studies show that a flat
voltage profile on the
system can significantly
reduce line losses.
 CAPACITOR BANK

15.  ISOLATING SWITCH
 In Sub-Station, it is often
desired to disconnect a part of
the system for general
maintenance and repairs. This
is accomplished by an
isolating switch or isolator
 isolator Switches are operate
only when the line is which
they are connected carry no
load.

16.  LIGHTENING ARRESTORS
 Lightening arrestors with earth
switch lightening arrestors after
the current transformer are used
so as to protect it from
lightening i.e. from high
voltage entering into it.
 This lightening arrestor has an
earth switch, which can directly
earth the lightening.
 lightening. The arrestor works
at 30° to 45° angel of the
lightening making a cone

17.  LINE ISOLATOR
 The line isolators are used to isolate
the high voltage flow through the
line into the bus. This isolator
prevents the instruments to get
damaged
 It also allows the only need of
voltage and rest is earthed by itself
 Insulators are used in electrical
equipment to support and separate
electrical conductors without
allowing current through
themselves.

18.  Single line diagram

19. Thankyou