DEPARTMENT OF TECHNICAL EDUCATION,A.P.Name: Ch Jyothi
Designation: enio! Le"t#!e!$!an"h: E%e"t!i"a% Enginee!ingInstit#te
: &o'e!nment Po%yte"hni",P!o((at#!)ea!*emeste! : I+
emeste!#,-e"t: A C MACHINE . ICo(e No: EE./01To2i" : ing%e Phase
T!ans3o!me!sD#!ation: 40 Mins.#, To2i":Const!#"tiona% (etai%s
o3t!ans3o!me!Tea"hing ai(s: 2hotos 5 (iag!amsEE /01./ 6Recap
78o!9ing 2!in"i2%e o3 t!ans3o!me!7Feat#!es o3
t!ans3o!me!7C%assi3i"ation o3 t!ans3o!me!Objective:On "om2%etion
o3this 2e!io(, yo# :o#%( ,e a,%e to:7Un(e!stan(the "onst!#"tiona%
(etai%s o3t!ans3o!me!EE /01./ 1Transformer constructionThe ,asi"
2a!ts o3 a t!ans3o!me! a!e7Magneti" "o!e78in(ings o! "oi%sEE /01./
/What are the basic parts of a transformer?Transformer
constructionMagnetic coreThe "o!e mate!ia% an( its "onst!#"tion
sho#%( ,e s#"h that7Ma;im#m 3%#; is "!eate(78ith minim#m
magnetiTransformer construction7In a%% ty2es o3 t!ans3o!me!s the
"o!e is ma(e o3 stee% ha'ing si%i"on "ontent7High si%i"on "ontent
!e(#"es the hyste!isis %oss 7Co!e is %aminate( to !e(#"e the e((y
"#!!ent %ossesEE /01./ ?T!ans3o!me! "onst!#"tion7To !e(#"e the
%osses 3#!the! "o%( !o%%e( g!ain o!iente( si%i"on stee% %aminations
a!e #se(7Laminations a!e ins#%ate( 3!om ea"h othe! ,y %ight "oat o3
'a!nish o! ,y an o;i(e %aye!EE /01./ @Transformer construction7The
%aminations a!e "#t in the 3o!m o3EA IA o! LA7To a'oi( high
!e%#"tan"e at the -oints the %aminations a!e ,#tte( against ea"h
othe! an( a%te!nate %aye!s a!ein'e!te(EE /01./ 60Transformer
construction78in(ings o! "oi%s7The t!ans3o!me! has high 'o%tage an(
%o: 'o%tage "oi%s 3o! ea"h 2hase7The "oi%s may ,e eithe!
"y%in(!i"a% "on"ent!i" o! san( :it"he( ty2eEE /01./ 66Transformer
constructionCon"ent!i" "oi%s7Con"ent!i" "oi%s a!e #se( in "o!e.ty2e
t!ans3o!me!s 7The t:o :in(ings a!e :o#n( on t:o (i33e!ent %im,s7Fo!
this ty2e.%ea9age 3%#; :i%% ,e mo!eEE /01./ 6BTransformer
constructionCon"ent!i" "oi%s "ont(..7 To !e(#"e the %ea9age 3%#;
the t:o :in(ings a!e :o#n( on the same %im, an( on ,oth the %im,s7
The 2ositioning o3 the H+ 5 L+ :in(ings :ith !es2e"t to the "o!e is
'e!y im2o!tant 3o! ins#%ation !eC#i!ementEE /01./61Transformer
constructionCon"ent!i" "o!e "ont(..7 The %o: 'o%tage :in(ing is
2%a"e( nea! the "o!e ,e"a#se its easie! to ins#%ate 3!om the "o!e7
The high 'o%tage :in(ings a!e 2%a"e( a3te! itEE /01./ 6/Transformer
constructionan( :it"he( "oi%s7an( :it"he( "oi%s a!e "ommon%y #se(
3o! she%% ty2e t!ans3o!me!s7Lea9age !ea"tan"e o3 the :in(ings "an
,e easi%y "ont!o%%e(7Lea9age 3%#; "an ,e 3#!the! !e(#"e( ,y
s#,(i'i(ing the H+ 5 L+ "oi%sEE /01./ 64Transformer
constructionan(.:it"he( "oi%s "ont(..7High 'o%tage "oi%s %ie
,et:een the t:o %o: 'o%tage "oi%s7The t:o %o: 'o%tage "oi%s a!e the
en(s ha'e ha%3 the t#!ns o3 %o: 'o%tage high 'o%tage "oi%s an(
these "oi%s a!e "a%%e( ha%3 "oi%sEE /01./ 6=SUMMARY:e
ha'e(is"#sse(a,o#t 7 the ,asi" 2a!ts o3 a t!ans3o!me!
7"o!e7:in(ingEE /01./ 6>U!"6D The "o!e is (i'i(e( into aD Lim, 5
8in(ings ,D )o9e 5 8in(ings "D )o9e 5 Lim,sEE /01./ 6?BD Co!e is
%aminate( to !e(#"eEEE.. Losses aD Hyste!esis %osses ,D E((y
"#!!ent %osses "D $oth FaD 5 F,D EE /01./ 6@GUIH1D T!ans3o!me! "o!e
is ma(e o3EEEE mate!ia%aD i%i"on stee% ,D I!on"D $oth FaD 5 F,DEE
/01./ B0GUIHGUIH/D Con"ent!i" "oi%s a!e #se( in "o!e ty2e o3
t!ans3o!me!saD T!#e,D Fa%se"D Neithe!EE /01./ B6GUIH4D an( :it"he(
"oi%s a!e #se( in she%% ty2e t!ans3o!me!s aD T!#e ,D Fa%se "D
Neithe!EE /01./ BB#re$uent%& aske' e(amination $uestions:6D
E;2%ain the "onst!#"tiona% (etai%s o3 at!ans3o!me!IEE /01./ B1
