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