Saturday, 28 September 2019

What is Sag (Electrical Transmission Line)

What is Sag

"is sag a necessity or evil" Discuss.
  • The straight distance between the two poles gives the shortest distance. Therefore to minimize the length of conductor, one may stretch the conductor to make it straight.
  • However if the conductor is stretched too much, beyond its safe value, then conductor may break due to excessive tension.
  • It is very important that conductors are under safe tension. In order to permit safe tension in the conductors, they are not fully stretched but are allowed to have some dip.
  • Thus the difference in level points of supports and lowest point on the conductor is called sag.
  • In Figure A and B are two supports and conductor is placed in between two supports the distance S shows the 'sag'.

What is Span Lengths of Transmission Line

Span Lengths of Electrical Transmission Line

  • The distance between the two adjacent poles is known as span length. It is generally denoted by 'l' (L) and specified in meters.
  • The location of the supports (towers) depends upon the profile of the land along which transmission line is to be run. This means the span length may not be equal.
  • When successive spans are unequal, changes in load or temperature will bring unequal changes in tension in the different span.
  • It is very difficult to calculate the sag and tension for each and every span and then to make adjustment while erecting the transmission line.
  • Therefore it is necessary to have calculations assuming uniform tension in the conductor between the two tension towers.
  • It can be shown mathematically that the variations in the tension with variation in load or temperature are within permissible limits.
  • Hence for preparing a sag calculations , the equivalent span is used . The equivalent span length can be calculated as follows.
  • Where L1, L2, L3 are the lengths of the individual spans between the two tension towers.
  • It is to be noted that the method of sag template for locating towers should not be used for long spans as well as where the slope of the profile is very steep . In such cases it is desirable to make actual calculations for sag and tension.

Sunday, 1 September 2019

Construction of Electrical Cable

Construction of Electrical Underground Cable




Components of Cable 
  1. Conductors
  2. Insulation 
  3. Metallic sheath 
  4. Bedding 
  5. Armouring (Mechanical protection)
  6. Serving
(1) Conductors
  • Conductors used for cables are generally made up of tinned copper or aluminium. To provide the sufficient flexibility conductors are used in stranded form.
  • Cable may consists of one, two, three or four conductors depending upon the service required.

(2) Insulation 
  • As the cable is laid underground conductor has to be provided with sufficient thickness of insulation.
  • The type and thickness of insulation depends upon the voltage level.
  • Insulating materials should provide the following properties :-
  1. High insulation resistance to avoid leakage current.
  2. High mechanical strength.
  3. Non porous.
  4. Chemically inert.
  5. High dielectric strength.
  6. Non inflammable.
  • Following are the different materials used for cable insulation :-
  1. Rubber.
  2. V.I.R. i.e. Vulcanized India Rubber.
  3. Impregnated paper.
  4. P.V.C. i.e. Polyvinyl Chloride.
  5. Varnished cambric.

(3) Metallic sheath
  • As the cable is placed under ground , soil may present , moisture , gases and some other liquids.
  • Therefore to protect the cable metallic sheath made up of lead or aluminium is provided over the insulation.

(4) Bedding
  • To protect the metallic sheath from corrosion and some mechanical injury, bedding is provided.
  • It is made up of some fibrous material such as jute or hessian tape.

(5) Armouring (Mechanical protection)
  • Armouring is used to protect the cable from mechanical injury while handling.
  • It consists of one or two layers of galvanised steel wire or steel tape.

(6) Serving
  • Serving is provided to protect the armouring from atmospheric conditions.
  • It is made up of some fibrous material like jute.

Monday, 1 July 2019

What is Contactor and its Function, How a Contactor Works

In this video I will show you What is Contactor, How a Contactor Works, Know About Contactor, Working Principle and Construction, Magnetic Contactor Working Principle, what is inside the contactor.

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↓ ๐Ÿ‘€ My other Videos ๐Ÿ‘€ ↓

Parts of Electrical Transformer and Its Functions (In Hindi):-
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What Is Buchholz Relay and How Does It Work?(In Hindi) :- https://youtu.be/lIiB5jKESV4

What is Electrical Earthing and its Necessity (In Hindi):- https://youtu.be/tFnqk8BEPP0

Top 10 Thermal Power Plant of INDIA (in Hindi):- https://youtu.be/cAWsXgJ7TLo

Why Electric Supply Frequency in INDIA is 50Hz, Why not 60Hz? (in Hindi):- https://youtu.be/lEvteWQK84o

How Circuit Breaker Detects Fault and Trips the Circuit?(In Hindi):- https://youtu.be/W1XedG4YwIA

How Does Electricity Come into Our Home? (In Hindi):- https://youtu.be/_WO2KjtXaHQ

Why Bird don't get Shocked on Electric Power Lines (In Hindi):- https://youtu.be/l1yaI2Vo9lw

Why Electrical Transmission line Voltage is Very High (In Hindi):- https://youtu.be/8c9PqsKokiw

[Only 30 Rs] How to Make Series Testing Lamp Easily (in Hindi):-https://youtu.be/mXv548MQqDY

How to Make Series parallel Electrical Testing Board (In Hindi):- https://youtu.be/4PqkpHU-qDs

How Series Parallel Electrical Testing Board Work and Its Wiring Connections (In Hindi):- https://youtu.be/fD2Ly5v1Mq8

How To Check Starter, Tube light, Choke, CFL, Bulb, Soldering machine by using Series lamp Test :- https://youtu.be/Jyr7LkhNibs

Two Way Switch Connection with Fan Regulator (In Hindi):-https://youtu.be/qX3UJtIIqN8

Two Way Switch , Wiring Connection + Application + Precaution (In Hindi):- https://youtu.be/MT_H321gg3I

In this video also cover topic
What is Contactor
Contactor
Electrical Contactor
How a Contactor Works
Working Principle of Contactor
what is inside Contactor
Contactor coil
Contactor coil connection
Contactor Connection

Top Electrical Interview Question.

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๐Ÿ‘‡ My Facebook page ๐Ÿ‘‡
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Created by:- Deepakkumar Yadav

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#Contactor #Electrical #Contactor_working #coil #Electric

Thursday, 20 June 2019

Electricity meter, Meter Wiring Connection, เคฌिเคœเคฒी เคฎीเคŸเคฐ เค•ा เค•เคจेเค•्เคธเคจ, kWh sub meter Connection

In this video I will show you Electrical Energy Meter wiring connection step by step.

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↓ PHOTOS






↓ ๐Ÿ‘€ My other Videos ๐Ÿ‘€ ↓

Parts of Electrical Transformer and Its Functions (In Hindi):- 
https://youtu.be/94WvB9Gx5_Q

Difference between Power Transformer and Distribution Transformer (In Hindi):-https://youtu.be/MyBRhnsb1xY

What Is Buchholz Relay and How Does It Work?(In Hindi) :- https://youtu.be/lIiB5jKESV4

What is Electrical Earthing and its Necessity (In Hindi):- https://youtu.be/tFnqk8BEPP0

Top 10 Thermal Power Plant of INDIA (in Hindi):- https://youtu.be/cAWsXgJ7TLo

Why Electric Supply Frequency in INDIA is 50Hz, Why not 60Hz? (in Hindi):- https://youtu.be/lEvteWQK84o

How Circuit Breaker Detects Fault and Trips the Circuit?(In Hindi):- https://youtu.be/W1XedG4YwIA

How Does Electricity Come into Our Home? (In Hindi):- https://youtu.be/_WO2KjtXaHQ

Why Bird don't get Shocked on Electric Power Lines (In Hindi):- https://youtu.be/l1yaI2Vo9lw

Why Electrical Transmission line Voltage is Very High (In Hindi):- https://youtu.be/8c9PqsKokiw

[Only 30 Rs] How to Make Series Testing Lamp Easily (in Hindi):-https://youtu.be/mXv548MQqDY

How to Make Series parallel Electrical Testing Board (In Hindi):- https://youtu.be/4PqkpHU-qDs

How Series Parallel Electrical Testing Board Work and Its Wiring Connections (In Hindi):- https://youtu.be/fD2Ly5v1Mq8

How To Check Starter, Tube light, Choke, CFL, Bulb, Soldering machine by using Series lamp Test :- https://youtu.be/Jyr7LkhNibs

Two Way Switch Connection with Fan Regulator (In Hindi):-https://youtu.be/qX3UJtIIqN8

Two Way Switch , Wiring Connection + Application + Precaution (In Hindi):- https://youtu.be/MT_H321gg3I

In this video also cover topic
wiring of energy meter
wiring connection of meter
sub meter wiring connection
energy meter
kWh meter connection
Electricity meter wiring connection
Electricity submeter wiring connection
sub meter connection

Top Electrical Interview Question.

๐Ÿ‘‡ My Website ๐Ÿ‘‡
https://www.deepakkumaryadav.in

๐Ÿ‘‡ My Facebook page ๐Ÿ‘‡
https://goo.gl/Ygb5hX

Created by:- Deepakkumar Yadav

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#Meter #Electrical #wiring #connection #deepakkumar

Tuesday, 11 June 2019

Top 7 Atomic Nuclear Power Plants in India

India Total Electricity Production(Generation) 344.7 G Watt
India Total Nuclear Power Plant Production(Generation) 6780 M Watt


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TOP  7 Nuclear power plant

07
Kakrapar Atomic Nuclear Power Station
its capacity 440 M Watt
Sector - Central {NPCIL}
Location:- Gujarat , Start at (6 May 1993)
They have UNITS
 2 x 220 M watt



06
Narora Atomic Nuclear Power Station
its capacity 440 M Watt
Sector - Central {NPCIL}
Location:- Uttar Pradesh , Start at (1 Jan 1991)
They have UNITS
 2 x 220 M watt

05
Madras Atomic Nuclear Power Station
its capacity 440 M Watt
Sector - Central {NPCIL}
Location:- Tamil Nadu  , Start at (24 Jan 1984)
They have UNITS
 2 x 220 M watt




04

Kaiga Atomic Nuclear Power Station
its capacity 880 M Watt
Sector - Central {NPCIL}
Location:- Karnataka  , Start at (16 Nor 2000)
They have UNITS
 4 x 220 M watt

03
Rajasthan Atomic Nuclear Power Station
its capacity 1080 M Watt
Sector - Central {NPCIL}
Location:- Rajasthan  , Start at (16 Dec 1973)
They have UNITS
 4 x 220 M watt
 1 x 200 M watt

02
Tarapur Atomic Nuclear Power Station
its capacity 1400 M Watt
Sector - Central {NPCIL}
Location:- Maharashtra  , Start at (28 Oct 1969)
They have UNITS
 2 x 160 M watt
 2 x 540 M watt

01
Kudankulam Nuclear Power Plant
its capacity 2000 M Watt
Sector - Central {NPCIL}
Location:- Tamil Nadu , Start at (28 Oct 1969 )



Not Completed Nuclear Power Plant 

Jaitapur Nuclear Power Project Jaitapur Nuclear Power Project is the well-known power plant and a proposed project of Nuclear Power Corporation of India. Once built, it will be the largest nuclear power generating station. The project comprises of six European pressurized reactors each with a capacity of 1650 MW. These reactors are considered to be the third-generation pressurized water reactors.

Kovvada Nuclear Power Plant Kovvadu Nuclear Power Plant is the proposed light and water nuclear power reactors. The plant is proposed to be set at Kovvada in Srikakulam district. According to the proposed plan, six 1000 MW light water nuclear power reactors need to be built. However, there are many political parties and leaders who are opposing the power plant construction owing to safety issues.