TITLE: - MEASUREMENT OF A, B, C, D CONSTANT FOR A
MEDIUM TRANSMISSION LINE AND PLOTTING OF ITS CIRCLE DIAGRAM TO EVALUATE PERFORMANCE.
AIM:-To find A, B, C, D para!"!r for a #i$!n !%&i$a'!n" od!' of a "ran(i((ion 'in!. APPARATUS : -
)* S"a"i+ od!' of a "ran(i((ion 'in!.- Ra"in# * Vo'"!"!r AC - Ra"in# * A!"!r AC - Ra"in# * Di!r ("a" - Ra"in# /* 0a""!"!r - Ra"in#
THEORY: -
T1! "ran(i((ion 'in!( 1a$! fo&r para!"!r(. para!"!r(. )* R!(i("an+!
* Ind&+"an+!
* Capa+i"or
* Cond&+"an+!
R!(i("an+! R!(i("an+! and ind&+"an+! ind&+"an+! ad! "1! (!ri!( ip!dan+! and 'in! +apa+i"or +apa+i"or and +ond&+"an+! ad! (1&n" adi""an+! adi""an+! of "1! 'in!. S1&n" +ond&+"an+! ar! &(&a''2 n!#'!+"!d n!#'!+"!d in (1or" po3!r "ran(i((ion "ran(i((ion 'in! 31!n +a'+&'a"in# $o'"a#! and +&rr!n" .C'a((ifi+a"ion of "ran(i((ion 'in! a++ordin# "o "1! '!n#"1 d!p!nd( &p on 31a" appro4ia"ion appro4ia"ion ar! 5&("ifi!d in "r!a"in# "1! para!"!r of 'in!. TRANSMISSION LINE IS CLASSIFIED AS 1) Short T.L.:-T1!(! ar! &(&a''2 678 'on# and 'in! $o'"a#! i( 9!'o3 /8V for (1or" 'in!( "1! "o"a'
+apa+i"i$! (&(+!p"an+! i( (o (a'' "1a" i" a2 9! n!#'!+"!d.
2) Medi! T.L.:- T1!2 ar! ro'2 9!"3!!n 67- 78 in '!n#"1 op!ra"in# $o'"a#! i( / 8V
-))78V.E%&a$a'!n" +ir+&i" of "1! 'in! +on(i("( of (!ri!( ip!dan+! and (1&n" adi""an+!.
") Lo#$ T.L.:-T1! '!n#"1 of "1! 'in! i( #r!a"!r "1an 78 3i"1 op!ra"in# $o'"a#! #r!a"!r "1an ))78V,
"1! (!ri!( ip!dan+! and (1&n" adi""an+! ar! &nifor'2 di("ri9&"!d o$!r "1! !n"ir! '!n#"1 of 'in!. A% &% C% AND D PARAMETER OF T.L. :-
TE SENDING END ;UANTITIES:S!ndin# !nd $o'"a#! V( (!ndin# !nd +&rr!n" I( +an 9! r!pr!(!n"!d in "!r( of "1! r!+!i$in# !nd %&an"i"i!( i.!. r!+!i$in# !nd $o'"a#! VR and and r!+!i$in# !nd +&rr!n" < IR .
)
V( < AVR = BIR I( < CVR = DIR A, B, C, D ar! +a''!d "1! 'in! para!"!r ar! +on("an", "1!r! $a'&! d!p!nd( on a#ni"&d! of +ir+&i" !'!!n"(. If (2!"ri+a' +ir+&i" A
A
,
B<>
and
C
2. Medi! Tr'#(!i((io# Li#e. :-
A < D < )= 2?@ B < > )= 2?@ C< Noina' !"1od A < D < )= 2?@ B<> C < )=2?@ 01!r!,>
Ei*'+e#t ,ir,it
A < D < )=>@
B<>
C < )=>@ @< )@>+ +o(1 r'-)*@(in1 r'*
>< > (in1 r'@r'* @< @"an r'@*@r'@**
PROCEDURE:-
). MaH! +onn!+"ion( a( (1o3n in +ir+&i" dia#ra, !a(&r! V( , I( and 0( 3i"1 r!+!i$in# !nd op!n +ir+&i"!d app'2 V(<7V. . S1or" +ir+&i" r!+!i$in# !nd, in+r!a(! V( #rad&a''2 (&+1 "1a" "1! +&rr!n" in "1! +ir+&i" do!( no" !4+!!d "1! ra"!d +&rr!n". M!a(&r! V(, I( and 0( . . Op!n +ir+&i" "1! (!ndin# !nd and app'2 $o'"a#! a" r!+!i$in# !nd. M!a(&r! VR , IR , 0R 3i"1 VR <7V. . S1or" +ir+&i" "1! (!ndin# !nd and in+r!a(! VR #rad&a''2 (&+1 "1a" IR do!( no" !4+!!d "1! ra"!d $a'&! /7of +&rr!n" )Ap*. M!a(&r! VR , IR , 0R . /. Find an#'! of ip!dan+! fro 3a""!"!r r!adin#(. . Find A, B, C, D para!"!r p'o" +ir+'! dia#ra and 'o+a"! 'oad poin"( for #i$!n dia#ra. J. For dra3in# +ir+'! dia#ra of R.E. of !di& T.L. +onn!+" r1!o("a" 'oad on T.L. app'2 7Va" S.E. of T.L. Ad5&(" "1! 'oad for ra"!d +&rr!n" i.!.)A.M!a(&r! VR , IR , 0R and V(, I(, 0(. O&SERATOIN TA&LE :Sr. No. Co#ditio#
)
o+t'$e
Crre#t
R.E.O.C. R.E.S.C. S.E.O.C. S.E.S.C.
I!ed'#,e
>(o< >((< >ro< >r(<
For ,ir,+e di'$r'! :o+t'$e/()
Crre#t/I()
0'tt!eter/0r)
Crre#t/Ir)
o+t'$e/r)
CALCULATIONS:-
)* A(o@>ro->r(* < D B<>r(K >(o@>ro->r(* C<)@ K>(o>ro->r(* T1!or!"i+a''2, Noina' T !"1od, A@*
B<> )=2?@*
and
C<
Noina' !"1od, A@* B<> C< )=2?@* Dra3 "1! +ir+'! dia#ra fro a9o$! r!adin#( CONCLUSION : -
Fro "1! a9o$! r!(&'" i" (!!n "1a" ABCD +on("an" 92 !4p!ri!n" and 92 +a'+&'a"ion ar! (a!. A'(o a4i& po3!r Pa4* 92 +ir+'! dia#ra and 92 +a'+&'a"ion i( appro4ia"!'2 (a!.
An(3!r "1! fo''o3in# %&!("ion(. ). E4p'ain "1! &(! of ABCD +on("an" for 'on# TL. . o3 do 2o& d!"!rin! "1! 'on# TL a( (2!"ri+a' r!+ipro+a"in# (2("! . 01a" i( "1! +1ara+"!ri("i+ +on("an" and propa#a"ion +on("an". . 01a" ar! #!n!ra'i?!d $a'&!( of ABCD +on("an" /. E4p'ain "1! +on+!p" of Noina' +H". and !%&i$a'!n" +H". in r!f. "o LTL.
