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A Project seminar on

DESIGN AND MANUFACTURE OF 100 KVA

CRGO CORE DISTRIBUTION TRANSFORMER

WITH CSP FEATURES

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Contents

Abstract

Introduction

Types of Distribution Transformers Conventional CSP

Transformer construction

Core Construction and Winding details

Conclusion

Reference

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Abstract

This project deals with Design and manufacturing of

CRGO core distribution transformer with CSP

features.

As the faults in the distribution network are more. so

it is important to install transformers with CSP

features.

The CSP features of transformers are explained in

detail.

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Introduction:Introduction:

The distribution transformer forms vital equipment inThe distribution transformer forms vital equipment in

the power network.the power network.

Distribution transformers will be energized throughDistribution transformers will be energized through

out the day, which means No load loss playsout the day, which means No load loss plays

prominent role.prominent role.

Energy efficiency distribution transformers areEnergy efficiency distribution transformers are

gaining its importance recentlygaining its importance recently..

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Types ofDistribution TransformersTypes ofDistribution Transformers::

Conventional NonConventional Non--CSPCSP

SealedNonSealed

Non--CSPCSP

SealedCSPSealedCSP

ConventionalCSPConventionalCSP

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CSPTCompletely self protected Transformer

CSPDue to the higher failure rate of secondary

Failure rateApprox 20% in India compared to 1-2% in advanced

countries.

CSP will do

It avoids major damages to the transformers by powersystem faults, by disconnecting the transformer (on either

side) from faulty circuit.

Conventional CSP

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Main Reasons forFailure

Changing weather conditions

Lengthy low voltage lines

Short circuit due to clashing of loosely string

LVlines.

Over loading of transformers

Lightning etc

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Advantages of CSP Technology

Enables a transformer to protect itself from faults

Uneconomical overloading on a regular basis is avoided

No scope of ingress of moisture

Failure due to undue pressure rise will not be there.

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ComponentsofCSPT

Signal light High voltage fuse

Emergency control magnetic trip

Surge arrester: For lightning protection

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Transformer construction:Transformer construction:

CoreCore

WindingsWindings InsulationInsulation

Core coilassemblyCore coilassembly

TankTank

FittingsandaccessoriesFittingsandaccessories

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CoreCore

Type: CRGOType: CRGO

CRGO : (Cold rolled grain oriented silicon steel)CRGO : (Cold rolled grain oriented silicon steel)

Available grades :M3, M4, M5, MOH etcAvailable grades :M3, M4, M5, MOH etc

Thicknesses : 0.23mm; 0.27mm; 0.30mm etcThicknesses : 0.23mm; 0.27mm; 0.30mm etc

Annealing Temp.: 800 Deg.CAnnealing Temp.: 800 Deg.C

Saturation Flux density : 1.92 TeslaSaturation Flux density : 1.92 Tesla

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Core Construction:Core Construction:

Stacked CoreStacked Core

Three Limbed core typeThree Limbed core type

Wound coreWound core

Shell typeShell type

Core typeCore type

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Three Limbed Stacked CoreThree Limbed Stacked Core

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Core Type Wound CoreCore Type Wound Core

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WindingsWindings

Winding Materials:Winding Materials:

CopperCopper

AluminumAluminum

Insulation:Insulation:

Super EnamelSuper Enamel

Double PaperDouble Paper

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CCA of Stacked Core Construction & SingleCCA of Stacked Core Construction & Single

Coil WindingCoil Winding

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CCA of Stacked Core Construction & CrossCCA of Stacked Core Construction & Cross

Over CoilsOver Coils

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Conclusion

Finally it is concluded from the abovediscussion that CSP features are best suited for

distribution transformers in the present day

situation.

FutureScope

Design considerations will be covered in the

further discussion after completion of project.

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THANK YOUTHANK YOU