diagram of various chapters1.pdf

7/28/2019 Diagram of various chapters1.pdf

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QQuuaalliittyy,, SSaaffeettyy && NNeettwwoorrkk SSeeccuurriittiizzaattiioonn,, BBRRPPLL 1

RMU Installation

Plinth Top View

Factorsaffectingon Earth

resistivity

SoilResistivity

SoilCondition

Moisture

Dissolvedsalts

ClimateCondition

PhysicalComposition Location of

Earth Pit

Effect of grainsize and itsdistribution

Effect ofcurrent

magnitude

AreaAvailable

Obstructions

300 mm 300 mm

300 mm

100

800 mm

1800 mm

700 mm

200 mm

200 mm

300 mm

300 mm 300 mm200


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LEVELS OF RESPONSIBILITY AT DIVISIONS(BRPL)

MINIMUM APPROACH DISTANCES

Dy General Manager

Division

AM/Mgr/Sr Mgrsubdivision

GET/DET

Lineman/Fitter

GET/DET

Lineman/Fitter


GET/DET

Lineman/Fitter

GET/DET

Lineman/Fitter


GET/DET

Lineman/Fitter

GET/DET

Lineman/Fitter


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Pillars ofBRPL

Quality

Safety

NetworkSecuritization

C11

C31

C51

C71

Ia+Ib+Ic=0

If

IaIbIc

I +I +I =0

R Y B

N/C-MPCB

N/C-MPCB

N/C-MPCB


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Fuses

For LV Systems,

DistributionFeeders andTransformers,VTs, Auxiliary

Supplies

Over currentand earth fault

1.Non-Directional

2.Direction

Differential

For feeders, Bus-bars, Transformers,Generators etc

1.High Impedance

2.Low Impedance

3.Restricted E/F

4.Biased

5.Pilot Wire

Distance

For transmission and sub-transmission lines anddistribution feeders, also

used as back-up protectionfor transformers andgenerators without signalingwith signaling to provideunit protection e.g.:

1.Time-stepped distanceprotection

2.Permissive under-reachprotection (PUP)

3.Permissive overreachprotection (POP)

4.Unblocking overreachprotection (UOP)

5.Blocking overreachprotection (BOP)

6.Power swing blocking

7.Phase comparison fortransmission lines

8.Directional comparison fortransmission lines

Miscellaneousprotection

1.under and over voltage

2.under and over

frequency3.A special relay forgenerators,transformers, motorsetc.

4.Control relays: auto-reclose, tap changecontrol, etc.

5.Tripping and auxiliaryrelays


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R Y

B

R

Y

B

Each Phase is at

line to neutral

voltage above

ground

Neutral point is

created by

distributive

capacitance

Phase R&Y are line to

line voltage above

ground due to fault

Phase B is at ground & no fault

current flows as there is no return

path to the source

Ungrounded System


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Surge Arrester

OLTC


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HT Line Components


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ASCR


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AB Cable


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http://electricalnotes.files.wordpress.com/2011/06/cross-arm.png


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http://electricalnotes.files.wordpress.com/2011/06/1.png


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http://electricalnotes.files.wordpress.com/2011/06/guy-strain.png


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http://electricalnotes.files.wordpress.com/2011/06/guy-set.png


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http://electricalnotes.files.wordpress.com/2011/06/crimped-tension.png


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http://electricalnotes.files.wordpress.com/2011/06/strain-insulator.png


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http://electricalnotes.files.wordpress.com/2011/06/pipe-earthing.png


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http://electricalnotes.files.wordpress.com/2011/06/pin-ins.png


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http://electricalnotes.files.wordpress.com/2011/06/insulator-pin.png


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http://electricalnotes.files.wordpress.com/2011/06/danger-board.png


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http://electricalnotes.files.wordpress.com/2011/06/danger-board-11kv.png


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Not


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Not

diagram of various chapters1.pdf

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