132 KV GRID SUBSTATION
RAJASTHAN RAJYA VIDYUT PRASARAN
NIGAM LIMITED (R.R.V.P.N.L)
R.R.V.P.N.L is a company of Rajasthan State
Electricity Board (RSEB) established by
Government of Rajasthan.
Aim of R.R.V.P.N.L is to provide reliable mission
service to customers.
132 KV G.S.S, Sitapura (JAIPUR) is a part of R.R.V.P.N.L.
2. LIGHTNING ARRESTER
3. BUS BAR
6. TRANSFORMER COOLING
8. CIRCUIT BREAKER
9. PROTECTIVE RELAY
11. POWER LINE CARRIER
12. CAPACITOR BANK
13. CONTROL ROOM
14. BATTERY ROOM
15. SINGLE LINE DIAGRAM
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 FEATURES OF 132KV GSS SITAPURA,
• In this substation the power is coming from two lines namely
• 132 KV INDIRA GANDHI NAGAR
• 132 KV SANGANER
2. LIGHTNING ARRESTER
Lightning arrester is a protective
device which provides protection
against high voltage from lightning.
A Lightning arrester has two
terminal viz a high voltage terminal
and a ground terminal.
It is used only for overhead line.
3. BUS BAR
• A Bus bar is a conducting bar that carries
heavy currents to supply several electric
• Bus bar is made from ‘Cu’ and ‘Al’.
TYPES OF BUS BAR-
1. Main Bus Bar
2. Auxiliary Bus Bar
• One Bus Bar is Main Bus Bar and
another is Auxiliary Bus Bar.
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
o POWER TRANSFORMER
•To step-down the voltage and transfer power
from one A.C voltage to another A.C Voltage
at same frequency.
MAIN PARTS OF POWER
Winding(H.V winding , I.V winding)
Oil Temperature Indicator
Winding Temperature Indicator
Current Transformer is an
instrument transformer used to
protection & Metering of high
values of current.
Current Transformer:- A C.T is
used to step down current for
measurement, control and
Potential Transformer:- Potential Transformer are Instrument
Transformer. A P.T is used to step down voltage for
measurement, control and protection.
CVTs are special king of PTs using capacitors to step
down the voltage. A capacitor voltage transformer (CVT), or capacitance
coupled voltage transformer (CCVT) is a transformer used in power
systems to step down extra high voltage signals and provide a low
voltage signal, for measurement or to operate a protective relay
Oil natural air natural
Oil natural air forced
It isolates the devices from
live line. When there is a
maintenance. It operates
when there is no load.
It is also used to change
bus bar line from main to
reserve or vice-versa.
7. 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
TYPES OF CIRCUIT BREAKER-which
is used in 132kv GSS sitapura
SF6 Circuit Breakers
Vacuum Circuit Breakers
8. PROTECTIVE RELAYS
• Protective Relay is a sensing
device and it is designed to
detect operating conditions
on an electric circuit.
• It trips the circuit breaker, when
fault is detected.
In order to avoid current leakage to the Earth,
through the supporting structure provide to the
conductor of overhead transmission lines,
insulators are used.
10. POWER LINE CARRIER COMMUNICATION
•For exchange of data and transfer message between grind
substation , Voice communication is necessary. For this purpose
high frequency Carrier current is transmitted on same
transmission line on which power is transmitted.
Hence such communication is called-
“POWER LINE CARRIER COMMUNICATION”.
11. CAPACITOR BANK
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.
12. CONTROL ROOM
C & R PANEL
To remote control of power switch gear requires the provision of
suitable control plates located at a suitable point remote from
immediate vicinity of CB’s and other equipment.
13. BATTERY ROOM & CHARGER
In a GSS, Separate dc supply is maintained for signaling remote
position control, alarm circuit etc. There is a battery room which
has 55 batteries of 2 volt.