LOCATION

Nimoda, Undal, Motipura,

Singharia and Devri villages of

Tehsil Jhalarapatan,

Distt. Jhalawar

LAND

The GOR has alloted 842 bigha Government land and aquired 1388

bigha private khatedari land for

the thermal project.

WATER

The state irrigation department has

alloted 1200 mcft water for the project

from proposed Kalisindh dam

COAL

Ministry of coal, Govt. of India

has alloted ‘Paras east and Kanta basin ‘ coal blocks to

RVUN in Chhatisgarh state. under

joined venture with M/s. Adani

Enterprises

.

BUS BAR

LIGHTING ARRESTER

CIRCUIT BREAKER

ISOLATOR

CURRENT TRANSFORMER

CAPCITIVE VOLTAGE TRANSFORMER

WAVE TRAPER

The whole switchyard is grounded with MAT Grounding.

In MAT grounding,5 Conductors are placed Horizontally & 8 Conductors are Placed Vertically.

All Switchyard equipment are grounded by two Earthing Connection.

In switchyard grounding,32mm earthing conductor is used & 75/2 GI earth Sheet is used.

All switchyard are gravelled to make the tower footing resistance high.

BUSBAR SCHEME

GT feeder

Line feeder

2000A

2000A

IPS tube of minimum 4.5 inch size

IPS tube of minimum 4.5 inch size

LIGHTNING ARRESTORS

• These are equipments designed to protect

insulators of power lines and electrical installations from lightening surges by diverting the surge to earth and instantly restoring the circuit insulation to its normal strength with respect to earth.

CIRCUIT BREAKER A circuit breaker is an automatically

operated electric switch designed to

protect an electrical circuit from

damage caused by overload or short

circuit.

Its basic function is to detect a fault

condition and, by interrupting

continuity, to immediately discontinue

electrical flow.

Unlike a fuse, which operates once

and then has to be replaced, a circuit

breaker can be reset (either manually

or automatically) to resume normal

operation.

SYSTEM ISOLATORS

• 400KV, 2000A, 40KA for 3.0 sec isolators for GT, lines, ICT

bays shall be provided.

The Isolator used in this plant is of two types.

Single pole double break isolator.

Double pole single break isolator.

CURRENT TRANSFORMERS

When current in a circuit is too high to directly apply to measuring

instruments, a current transformer produces a reduced current

accurately proportional to the current in the circuit, which can be

conveniently connected to measuring and recording instruments

400KV oil filled live tank type hermetically sealed single phase

current transformers will be used.

Multi-ratio CT tapping shall be provided on the secondary side to

obtain different ratios in order to different ratios In order to permit

different ratios on each core, as desired.

C

V

T

capacitor voltage transformer (CVT) is a transformer used to step down extra high voltage signals and provide a low voltage signal, for measurement or to operate a protective relay.

Nominal/highest system voltage 400/420 KV Rated primary voltage 400 KV/1.732 Rated secondary voltage 110 V/1.732

• An electronic filtering device designed to exclude unwanted

signals or interference.

• It blocks the high frequency carrier waves (24 kHz to 500 kHz)

and let power waves (50 Hz - 60 Hz) to pass through. It is basically an inductor of rating in milli henry.

• Purpose of ICT is simply interconnection between 400KV and 220KV Switchyard.

• 315MVA,400/220/33 KV

ONAN ONAF ODAF

HV 189 252 315

LV 189 252 315

TV 63 84 109

KaTPP

SWITCHYARD

400KV

BTAWDA

400KV

BTAWADA

220KV JHALAWAR

220KV

JHALAWAR

GENERATOR BAY

24

Grid Incomer Bay

25

Bus PT Bay

26

Bus Coupler Bay

Bus Sectionaliser Bay.

ST back charging Bay

27

CLEARANCES

Interlocks When Circuit breaker is ON, Isolator should not

operate. When Isolator is CLOSE, Earth switch should be OPEN. When Both the Bus are charged, Bus coupler should

not become CLOSE. When DC supply if not available, alarm should be

raised. When gas pressure inside the Breaker is reduced to

5Kg/cm2,the alarm should be raised.

28

When the oil pressure inside the current transformer is low , then alarm should be raised.

When the Nitrogen gas pressure is low at the Current Transformer , then alarm should be raised.

RADHEY SHYAM MEENA Student Member Of

Institute Of Electrical & Electronics Engineers (IEEE) The Institute Of Engineering & Technology (IET)

The South African Institute Of Electrical Engineers(SAIEE) International Electrotechnical Commission (IEC)

Universal Association Of Computer & Electronica Engineers(UACEE) Coordinator:-Disha Gyan Sanstha(Rural Education Devlopment Technology)