transformer manufacturing and design

8/19/2019 transformer manufacturing and design

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INTRICACIES OFTRANSFORMER

MANUFACTURIN

G


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G MAJOR COMPONENTS

CORE WINDING

DIELECTRIC TANK


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CORE


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LOW RELUCTANCE CRGO MATERIAL FOR HIGHER COEFFICIENT

OF COUPLING AND LOW IRON LOSSES.

EX. 1)M4 – 1.3 WATTS/KG 2) MOH - 1.03 WATTS/KG 3)DK - .!" WATTS /KG

CORE LAMINATION THICKNESS OF .23/.2#/.30 $$.

0.00% $$ CARL&TE INSULATION'SUSTAINA(LE UPTO 1100 *+ C) IN EACHLAMINATED CORE.

USE OF LASER SCRI(ED CORE STEEL TO A,OID (URS A(O,E30 MICRONS AND REDUCE LOSSES

STEPLAP CORE CONSTRUCTION WITH MITERED OINTS FOR MECHANICALSTRENGTH HIGHER (IULDING/STACKING FACTOR

AND PERPENDICULARL& DIRECTED FLUX DISTRI(UTION'TO A,OID INGRAIN AND CROSSGAIN LOSSES).


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STEEPER (-H CUR,E FOR TO A,OID SATURATION AND

O,ER FLUXING CONDITIONS 'CONTINUOUS FOR 110

1 MIN. FOR 12" AND " SECONDS FOR 140 OF RATED ,OLTAGE )

A(ILT& TO SUSTAIN GEOMAGNETIC DISTUR(ANCES WITHOUT

SATURATION OF THE CORE.

USE OF NON MAGNETIC STEEL FOR CLAMP PLATES AND ELIMINATION

OF &OKE (OLTS IN HIGHER CAPACIT&

TRANSFORMERS FOR REDUCED STRA&LOSS

IMPRO,ED INSULATION.

USE OF (OTTON SPACERS IN CORE FOR (ETTERR SPACE FACTOR

AND OIL FLOW.


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WINDING


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ENAMEL PAINTED ELECTROL&TIC GRADE COPPER

T&PE1) PAPER INSULATED COPPER CONDUCTOR

2) CONTINUOUSL& TRANSPOSED CONDUCTOR

MECHANICAL STRENGTH SPACE FACTOR

,OLTAGE CLASS AND T&PE OF WINDINGDECIDES THE (ASIS OF CONDUCTOR

SELECTION.

HELICAL AND SPIRAL WINDINGS ARE

PREFERRED FOR L, WINDING.

DISC WINDING WITH INTERLEA,ING/CROSSO,ER

IS PREFERRED FOR H, WINDING.

USE OF CLAMPING INSULATING RING 'UDL WOOD)

FOR OPTIMIATION OF AXIAL CLEARANCE


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OPTIMIATION OF RADIAL

CLEARANCES THROUGH

S&MMETRICAL

STRESS DISTRI(UTION.

INTERLEA,ING OF WINDINGS

INCREASES ITS MECHANICAL

STRENGTH AND IMPULSE/S.C

WITHSTAND CAPA(ILIT&.

PROPER TRANSPOSITON OF

CONDUCTORS FOR REDUCING

CIRCUATING CURRENTS AND

EDD& LOSSES.

WIDTH THICKNESS % OR

ELSE EDD& CURRENT LOSSES

WILL (E 1"0.

IMPRO,ED INTER TURN

INSULATION AND COOLING

THROUGH THE USE OF

T-SPACERS.


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DIELECTRIC


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T*5 67 89:;5769$*9 O


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6;* A

N*:9= B;


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(USHING OLTC


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FOR DIFFERENT POLLUTION LEVELS

POLLUTION LEVELS CREEPAGE DISTANCE

I. Light ( areas without industries,agricultural or mountain areas ) 16 mm/kV

II. Medium ( areas with industriesnot producing pollution smoke,

Low density o house areas not e!posedto the coast)

"# mm/kV

III. $ea%y (&reas with high density oindustries, high density o

$eating plants producing pollution,areas close to the sea.)

"' mm/kV

IV. Very $ea%y(&reas close to

the coast and e!posed to sea spray,

desert areas, areas e!posed to strong

winds carrying salt and sand etc )

1mm/kV

Example: for 145 kV Bushing with heavy pollution level minimum creepagedistance works to be

145 kV! "5mm#kV $ %&"5mm


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'his is provided at the oil side of

the bushing to control theelectrostatic field inside the

transformer after installation


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(:5


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OLTC ON AUTO-CONNECTED TRANSFORMERS

U1

U2

U1

U2

U1

U2

U1

U2

OPERATING SEJUENCE OF TAP SELECTOR


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OPERATING SEJUENCE OF TAP SELECTOR

DI,ERTER SWITCH

T: S*=*869

O*9:8


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Copyright © 2006 ACNielsena VNU business

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SCR OLTC TYPE DESCRIPTION

! 1200 " 60 /#-101$3%

0- &inear 1% " 'e(ersing )ith 1 *iposition

3% " 'e(ersing )ith 3 *ipositions

No, o positions .0 to 3

!nsulation lass o tap seletor.#/C/

!nsulation togroun.60/110/10/220/300

Current 'ating.30/00/600/00/1200/100/100

!-ne poles suitable or 1 phase

!!!-ne poles suitable or 3 phases.star

onnete

SCR


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Leakage Flux and stray loss control

Magnetic Field Plot wito!t

"o#e $!nt and Wall $!nt

Magnetic Field Plot wit

"o#e $!nt and Wall $!nt


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P%oce$$ing o& T%an$&o%'e%

Te (!alit) o& a t%an$&o%'e% and con$e(!entl) it$ *e%&o%'ance

and li&e de*end$ e$$entiall) on te d%)ing *%oce$$ ca%%ied o!t

in te &acto%)

Te a$$e'+led acti,e *a%t o& te t%an$&o%'e% i$ eated in te

o,en &o% e-t%action o& 'oi$t!%e !nde% ,ac!!'

P%o*e% d%) o!t i$ ,e%) i'*o%tant el$e te winding$ wo!ld

+eco'e loo$e in $e%,ice and 'a) get di$to%ted !nde% $o%t

ci%c!it condition$

Once te 'oi$t!%e i$ e-t%acted to te de$i%ed le,el oil i$ &illed!nde% ,ac!!' and te t%an$&o%'e% i$ $oa#ed in oil.


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D%)ing and I'*%egnation

Te in$!lation $)$te' in t%an$&o%'e% need !t'o$t attention. Te oil *a*e%and *%e$$+oa%d in$!lation a$ to +e &%ee o& di%t d!$t and 'oi$t!%e &o%

o+taining te o*ti'!' in$!lating *%o*e%tie$.

Moi$t!%e i$ in/!%io!$ to in$!lation $)$te' $ince it %ed!ce$ te elect%ic

i'*!l$e ,oltage $t%engt and te %e$i$ti,it) o& te oil and accele%ate te

dete%io%ation o& $olid in$!lation.

P%oce$$ing eli'inate$ all t)*e$ o& i'*!%itie$ and &o%eign *a%ticle$ &%o'

t%an$&o%'e% .

D!%ing ,ac!!' d%)ing and oil i'*%egnation te ga$e$ t%a**ed in$ide $olid

in$!lation and occl!ded a'ong int%icate *%o&ile o& in$!lation co'*onent$

a%e al$o %e'o,ed wic %e$!lt$ in low *a%tial di$ca%ge ince*tion ,oltage.

O*ti'al !tili0ation o& te e-cellent *%o*e%tie$ o& oil cell!lo$e dielect%ic

$)$te' de*end$ on te e&&icient d%)ing dega$$ing and i'*%egnation

*%oce$$ ado*ted .


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LATEST TRENDS

…

USE O IODE!RADEALE OILS LI"E ESTER OILS

AUTO#ATI$ #ONITORIN! S%STE#S LI"E ON LINE D!A& ON

LINE PD #ONITORIN! ET$'

IRE OPTI$ #ONITORIN! O TE#PERATURES

S RA #EASURE#ENT OR TRANS OR#ERS SI!NATURE

SUR A$E TE#PERATURE #ONITORIN! % T(ER#AL I#A!IN!

INITE ELE#ENT #ET(OD ANAL%SIS TO AVOID

ERRRORESONA$E&(AR#ONI$ RESONAN$E AND PART

)INDIN! RESONAN$E'

USE O DIVERTER )IT( VA$$U# $O#PART#ENT'

RECOMMENDATION FOR VALUE


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RECOMMENDATION FOR VALUE

ADDITION

U'!N@ ;9A5 'UN 5985 5;9 ANU7AC5U'9'A= #9 A8:9 5 CN7!' 5;9 !& 7&% 'A59!8 #9&% 1959'/89C 5 AV! 85A5!C9&9C5'!C!5= !8C;A'@9,

5;9 #U8;!N@ C'99


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THANK YOU

transformer manufacturing and design

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