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Transcript of Thesis for fault analysis using MATLAB
7/23/2019 Thesis for fault analysis using MATLAB
http://slidepdf.com/reader/full/thesis-for-fault-analysis-using-matlab 1/14
FAULT ANALYSIS USING MATLAB
A PROJECT REPORT
Submitted in partial fulfillment of the Requirements
For the Degree of
BACHELOR OF ENGINEERING
IN
ELECTRICAL AND ELECTRONICS
Submitted by
Nupoor Shukla
Nawal Pathak
Moha!" Sa#aullah $ha#
Under Guidance of
Pro%& A'hala Ja(#
D!part!#t o% El!'tr('al ) El!'tro#('* E#+(#!!r(#+
Shr(Sha#kara'har,aT!'h#('al Capu*-
Shr(Sha#kara'har,a Group o% I#*t(tut(o#*- Bh(la(
.R!'o+#(/!" 0, A&I&C&T&E& N!w D!lh(& A''r!"(t!" by N&B&A&- N!w D!lh(1
D!'!0!r 2 3456
7/23/2019 Thesis for fault analysis using MATLAB
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Certificate
C!rt(%(!" that th! 'o#t!#t* o% th! pro7!'t r!port !#t(tl!"- "Fault analysis using
MATLAB" (* a 0o#a%("! work 'arr(!" out u#"!r , +u("a#'! 0, Nupoor
Shukla ,Nawal Pathak, Mohae! Sanaullah han (# part(al %ul%(ll!#t o% th!
r!8u(r!!#t* %or th! "!+r!! o% Ba'h!lor o% E#+(#!!r(#+ (# El!'tr('al a#"
El!'tro#('*&
Appro#e! $y% &ui!e! $y %
'r( )( N( Patel Achala *ain
.H&O&D1 Pro%!**or
D!part!#t o% El!'tr('al D!part!#t o% El!'tr('al
a#" El!'tro#('*E#++ a#" El!'tro#('* E#++
SSTC, Bhilai SSTC, Bhilai
C+)TFCAT+ -F 'SS+)TAT-N -F ACC+PTANC+
7/23/2019 Thesis for fault analysis using MATLAB
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Th(* (* to '!rt(%, that pro7!'t work !#t(tl!" 9FA.LT ANAL/SS .SN&
MATLAB: 'arr(!" out 0, N.P--) S0.LA,NA1AL PAT0A,
M-0AMM+' SANA.LLA0 0AN *tu"!#t* o% El!'tr('al a#" El!'tro#('*
E#+(#!!r(#+ ;th *!!*t!r .34561- o% Shr(Sha#kara'har,a T!'h#('al Capu*-
Ju#wa#(- .Bh(la(1 (* h!r!0, a''!pt!" a#" appro<!" a%t!r prop!r !<aluat(o# a* a
'r!"(ta0l! work *u0(tt!" (# part(al %ul%(ll!#t o% th! r!8u(r!!#t %or th! awar" o%
th! D!+r!! o% Ba'h!lor o% E#+(#!!r(#+ (# El!'tr('al a#" El!'tro#('* %ro
Chhattisgarh Swai 2i#ekanan! Technical .ni#ersity, Bhilai3C(&(4(
It (* u#"!r*too" that 0, th(* appro<al- th! u#"!r*(+#!" "o #ot
#!'!**ar(l, !#"or*! or appro<! a#, *tat!!#t a"!- op(#(o# !=pr!**!" or
'o#'lu*(o# th!r!(#- 0ut appro<! th! r!port %or th! purpo*! o% wh('h (t (* *u0(tt!"&
Nae% Nae%
nternal +5ainer +5ternal+5ainer
'ate%
ACN-1L+'&+M+NT
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>!- th! *tu"!#t* o% Shr(Sha#kara'har,a Group o% I#*t(tut(o#* ha<! tak!#
!%%ort* (# th(* pro7!'t& How!<!r- (t woul" #ot ha<! 0!!# po**(0l! w(thout
th! k(#" *upport a#" h!lp o% a#, (#"(<("ual* a#" or+a#(/at(o#*& >!
woul" l(k! to !=t!#" our *(#'!r! tha#k* to all o% th!&
>! ar! h(+hl, (#"!0t!" to HoD& Dr& R&N Pat!l %or pro<("(#+ u* all th!
r!*our'!* #!!"!" %or th! 'opl!t(o# o% our pro7!'t& >! woul" l(k! to
tha#k our pro7!'t +u("! Mr*&A'hala Ja(# %or h!r 'o#*ta#t *up!r<(*(o# a*
w!ll a* %or pro<("(#+ #!'!**ar, (#%orat(o# r!+ar"(#+ th! pro7!'t ) al*o
%or h!r *upport (# 'opl!t(#+ th! pro7!'t&
>! woul" l(k! to !=pr!** our +rat(tu"! towar"* th! %a'ult, !0!r* o%
El!'tr('al a#" El!'tro#('* "!part!#t %or th!(r k(#" 'o2op!rat(o# a#"
!#'oura+!!#t- wh('h h!lp!" u* (# th! 'opl!t(o# o% th(* pro7!'t&
Our tha#k* a#" appr!'(at(o#* al*o +o to our par!#t* a#" 'oll!a+u!* (#
"!<!lop(#+ th! pro7!'t a#" p!opl! who ha<! w(ll(#+l, h!lp!" u* out w(th
th!(r a0(l(t(!*&
Nupoor Shukla
Nawal Pathak
Mohae! Sanaullah han
ABST)ACT
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A MATLAB 0a*!" *(ulat(o# tool ha* 0!!# "!<!lop!" to 'al'ulat! th! *hort2'(r'u(t
%ault 'urr!#t* (# pow!r tra#*(**(o# l(#!* a#" to u*! a* a# !"u'at(o#al at!r(al
%or 'our*!* o# pow!r *,*t! a#al,*(*& Pr!*!#t!" "o'u!#t* 'o#ta(#* *tu", a0out
"(%%!r!#t *hort '(r'u(t %ault* o''urr(#+ (# tra#*(**(o# l(#! a#" th!r! "!t!'t(o# u*(#+
MATLAB& Pr!*!#t!" *(ul(#k pro<("!* th! 'al'ulat(o# o% *(#+l! l(#!2to2+rou#"
.5LG1- l(#!2to2l(#!.3LS1- a#" "ou0l! l(#!2to2+rou#" .3LG1 %ault* o# tra#*(**(o#
l(#!*& S,!tr('al 'opo#!#t* o% 'urr!#t* a#" <olta+!* ar! u*!" %or 'al'ulat(o#*
(# th! pro+ra& B, !a#* o% th! pro+ra- 'al'ulat!" %ault 'urr!#t* a#" <olta+!* o#
th! %ault po(#t o% th! l(#! ha<! 0!!# pr!*!#t!" 0oth (# p!r2u#(t a#" (# r!al <alu!*&
Furth!ror!- th(* 'al'ulat!" 'urr!#t* a#" <olta+!* 'a# 0! o0*!r<!" (# +raph('al
pr!*!#tat(o#& I# th(* wa,- a# !%%!'t(<! a#" !%%('(!#t tool ha* 0!!# "!<!lop!" %or th!
*tu"!#t* to 'h!'k th! a''ura', o% th!(r 'al'ulat(o#* a#" to o0*!r<! th! <ar(at(o#* o%
wa<!%or*& Th! purpo*! o% th(* GUI 0a*!" tool (* to h!lp th! *tu"!#t to u#"!r*ta#"
th! 'o#'!pt o% *,!tr('al 'opo#!#t* a#" *hort2'(r'u(t %ault*&
7/23/2019 Thesis for fault analysis using MATLAB
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C-NT+NTS
? Fo#t S(/! 5@
5& NT)-'.CT-N 455&5 A( a#" *'op! 43
5&3 L(t!ratur! *ur<!, 4
NT)-'.CT-N
Th!r! ar! a #u0!r o% "(%%!r!#t t,p!* o% %ault* that a, o''ur (# pow!r *,*t!*&
Thr!! pha*! *,!tr('al %ault o''ur* (# thr!! pha*! *,*t!* wh!r! th! pha*!
'o#"u'tor* ar! (# 'o#ta't w(th !a'h oth!r& Th! pha*! to pha*! %ault o''ur* wh!#
two pha*! 'o#"u'tor* ar! (# 'o#ta't w(th !a'h oth!r& A *(#+l! pha*! to +rou#" %ault
o''ur* 0!tw!!# a pha*! 'o#"u'tor a#" #!utral 'o#"u'tor or +rou#" 'o#"u'tor (#
thr!! pha*! +rou#"!" #!utral *,*t!*& I% two pha*! 'o#"u'tor* ar! (# 'o#ta't w(th
th! #!utral or +rou#" 'o#"u'tor- a two pha*! to +rou#" %ault o''ur*& Fault a#al,*(*
(* <!r, (porta#t part o% pow!r *,*t! a#al,*(*& Stu",(#+ *,!tr('al %ault
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a#al,*(* (* !a*(!r tha# t!a'h(#+ u#*,!tr('al %ault* a#" th(* 'opl!=(t, l!a"* to a
lo** o% %o'u* a#" la'k o% u#"!r*ta#"(#+ o% th! 0a*(' pro'!**!* a%%!'t(#+ th! <alu!*
o% 'urr!#t* a#" <olta+!* a%t!r th! o''urr!#'! o% a %ault a#" th! *tu"!#t* 0!'o!
(#"(%%!r!#t to th! <ar(at(o# (# th! r!*ult* %ro o#! t,p! o% %ault to a#oth!r&
U*(#+ <(*ual tool* to 'al'ulat! a#" pr!*!#t th! <ar(at(o#*- ak!* th! 'o#'!pt
o% %ault or! u#"!r*ta#"a0l! a#" la*t(#+ %or th! purpo*! o% *tu",& Graph('al U*!r
I#t!r%a'!* .GUI1(* o#! o% th! <(*ual tool* to pro<("! th! u*!r w(th (#t!ra't(<! <(*ual
'ou#('at(o# w(th th! ta*k* o# ha#" a#" th! *olut(o# pro'!**& >(th GUI- th!
*tu"!#t 'a# *tart appl,(#+ th! appl('at(o# *o%twar! to *ol<! th! pro0l! or!
!%%('(!#tl,& Th! GUI !#<(ro#!#t k!!p* o*t o% th! t!"(ou* a#" r!p!t(t(<!
'al'ulat(o#* (# th! 0a'k+rou#"- allow(#+ th! u*!r to *p!#" or! t(! (#
th! a#al,*(* o% th! r!*ult* o0ta(#!"& Ma#, pow!r *,*t! a#al,*(* appl('at(o#* ha<!
0!!# "!<!lop!" tak(#+ a"<a#ta+! o% GUI& I# th(* *tu",- a MATLABGUI
.Graph('al U*!r I#t!r%a'!1 0a*!" *(ulat(o# tool ha* 0!!# "!<!lop!" to 'al'ulat!
th! *hort2'(r'u(t %ault 'urr!#t* (# pow!r tra#*(**(o# l(#!*& Th! pro+ra pro<("!*
th! 'al'ulat(o# o% %our "(%%!r!#t %ault* o# tra#*(**(o# l(#!*& For 'al'ulat(o#* o%
%ault 'urr!#t* a#" <olta+!* *,!tr('al 'opo#!#t* ar! u*!"& A GUI20a*!" u*!r2%r(!#"l, (#t!r%a'! ha* 0!!# "!<!lop!"& Th! *tu"!#t* ar! al*o a0l! to *!! th!
+raph('al <ar(at(o#* o% %ault 'urr!#t* a#" <olta+!* (# GUI *'r!!#&
THE LITERATURE SUREY
G!#!ral El!'tr(' pow!r (* +!#!rat!"- tra#*(tt!" a#" "(*tr(0ut!" <(a lar+!
(#t!r'o##!'t!" pow!r *,*t!*& Th! +!#!rat(o# o% !l!'tr(' pow!r tak!* pla'! (# a
pow!r pla#t& Th!# th! <olta+! l!<!l o% th! pow!r w(ll 0! ra(*!" 0, th! tra#*%or!r
0!%or! th! pow!r (* tra#*(tt!"& El!'tr(' pow!r (* proport(o#al to th! pro"u't o%
<olta+! a#" 'urr!#t th(* (* th! r!a*o# wh, pow!r tra#*(**(o# <olta+! l!<!l* ar!
u*!" (# or"!r to (#((/! pow!r tra#*(**(o# lo**!*& Th! pr(ar, o07!'t(<! o% all
pow!r *,*t!* (* to a(#ta(# th! 'o#t(#uou* pow!r *uppl,& Dur(#+ #oral
op!rat(#+ 'o#"(t(o#*- 'urr!#t w(ll %low throu+h all !l!!#t* o% th! !l!'tr('al pow!r
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*,*t! w(th(# pr!2"!*(+#!" <alu!* wh('h ar! appropr(at! to th!*! !l!!#t* rat(#+*&
How!<!r- #atural !<!#t* *u'h a* l(+ht#(#+- w!ath!r- ('!- w(#"- h!at- %a(lur! (#
r!lat!" !8u(p!#t a#" a#, oth!r u#pr!"('ta0l! %a'tor* a, l!a" to u#"!*(ra0l!
*(tuat(o#* a#" 'o##!'t(o# 0!tw!!# th! pha*!* 'o#"u'tor* o% a tra#*(**(o# l(#!* or
th! pha*! 'o#"u'tor* to +rou#"- th!*! t,p!* o% !<!#t* ar! k#ow# a* %ault*& A %all(#+
tr!! o# a tra#*(**(o# l(#!* 'oul" 'au*! a thr!!2pha*! %ault wh!r! all pha*!* *har! a
po(#t o% 'o#ta't 'all!" %ault lo'at(o#& I# "(%%!r!#t o''a*(o#*- %ault 'oul" 0! a r!*ult
o% (#*ulat(o# "!t!r(orat(o#- w(#" "aa+! or hua# <a#"al(*& Fault* 'a# 0!
"!%(#!" a* th! %low o% a a**(<! 'urr!#t throu+h a# (prop!r path wh('h 'oul"
'au*! !#orou* !8u(p!#t "aa+! wh('h w(ll l!a" to (#t!rrupt(o# o% pow!r-
p!r*o#al (#7ur,- or "!ath& I# a""(t(o#- th! <olta+! l!<!l w(ll alt!r#at! wh('h 'a#
a%%!'t th! !8u(p!#t (#*ulat(o# (# 'a*! o% a# (#'r!a*! or 'oul" 'au*! a %a(lur! o%
!8u(p!#t *tart2up (% th! <olta+! (* 0!low a (#(u l!<!l& A* a r!*ult- th!
!l!'tr('al pot!#t(al "(%%!r!#'! o% th! *,*t! #!utral w(ll (#'r!a*!& H!#'!- P!opl!
a#" !8u(p!#t w(ll 0! !=po*!" to th! "a#+!r o% !l!'tr('(t, wh('h (* #ot a''!pt!"&
A#, pow!r *,*t! 'a# 0! a#al,/!" 0, 'al'ulat(#+ th! *,*t! <olta+!* a#" 'urr!#t*
u#"!r #oral ) a0#oral *'!#ar(o*& Th! %ault 'urr!#t* 'au*!" 0, *hort '(r'u(t*
a, 0! *!<!ral or"!r* o% a+#(tu"! lar+!r tha# th! #oral op!rat(#+ 'urr!#t* a#"ar! "!t!r(#!" 0, th! *,*t! (p!"a#'! 0!tw!!# th! +!#!rator <olta+!* a#" th!
%ault- u#"!r th! wor*t *'!#ar(o (% th! %ault p!r*(*t*- (t a, l!a" to lo#+2t!r pow!r
lo**- 0la'kout* a#" p!ra#!#tl, "aa+! to th! !8u(p!#t& To pr!<!#t *u'h a#
u#"!*(ra0l! *(tuat(o#- th! t!porar, (*olat(o# o% th! %ault %ro th! whol! *,*t! (t
(* #!'!**ar, a* *oo# a* po**(0l!& Th(* (* a''opl(*h!" 0, th! prot!'t(<! r!la,(#+
*,*t!& Th! pro'!** o% !<aluat(#+ th! *,*t! <olta+!* a#" 'urr!#t* u#"!r <ar(ou*
t,p!* o% *hort2'(r'u(t* (* 'all!" %ault a#al,*(* wh('h 'a# "!t!r(#! th! #!'!**ar,
*a%!t, !a*ur!* ) th! r!8u(r!" prot!'t(o# *,*t! to +uara#t!! th! *a%!t, o% pu0l('&
Th! a#al,*(* o% %ault* l!a"* to appropr(at! prot!'t(o# *!tt(#+* wh('h 'a# 0!
'oput!" (# or"!r to *!l!'t *u(ta0l! %u*!- '(r'u(t 0r!ak!r *(/! a#" t,p! o% r!la,& Th!
*!<!r(t, o% th! %ault "!p!#"* o# th! *hort2'(r'u(t lo'at(o#- th! path tak!# 0, %ault
'urr!#t- th! *,*t! (p!"a#'! a#" (t* <olta+! l!<!l& I# or"!r to a(#ta(# th!
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'o#t(#uat(o# o% pow!r *uppl, to all 'u*to!r* wh('h (* th! 'or! purpo*! o% th!
pow!r *,*t! !=(*t!#'!- all %ault!" part* u*t 0! (*olat!" %ro th! *,*t!
t!porar, 0, th! @ prot!'t(o# *'h!!*& >h!# a %ault !=(*t* w(th(# th! r!la,
prot!'t(o# /o#! at a#, tra#*(**(o# l(#!- a *(+#al w(ll tr(p or op!# th! '(r'u(t
0r!ak!r (*olat(#+ th! %ault!" l(#!& To 'opl!t! th(* ta*k *u''!**%ull,- %ault a#al,*(*
ha* to 0! 'o#"u't!" (# !<!r, lo'at(o# a**u(#+ *!<!ral %ault 'o#"(t(o#*& Th! +oal (*
to "!t!r(#! th! opt(u prot!'t(o# *'h!! 0, "!t!r(#(#+ th! %ault 'urr!#t* )
<olta+!*& I# r!al(t,- pow!r *,*t! 'a# 'o#*(*t o% thou*a#"* o% 0u*!* wh('h
'opl('at! th! ta*k o% 'al'ulat(#+ th!*! para!t!r* w(thout th! u*! o% 'oput!r
*o%twar!* *u'h a* Matla0& I# 56@- L&>& Coo0! a#" D& G& L!w(* propo*!" th!
%(r*t %ault a#al,*(* pro+ra& Ma#, !=(t(#+ t!=t* o%%!r a# !=t!#*(<! a#al,*(* (# %ault
*tu"(!* a#" 'al'ulat(o#&
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Faults in transission line
I# a# !l!'tr(' pow!r *,*t!- a %ault or %ault 'urr!#t (* a#, a0#oral !l!'tr('
'urr!#t& For !=apl!- a *hort '(r'u(t (* a %ault (# wh('h 'urr!#t 0,pa**!* th! #oral
loa"& A# op!#2'(r'u(t %ault o''ur* (% a '(r'u(t (* (#t!rrupt!" 0, *o! %a(lur!&
I# thr!!2pha*! *,*t!*- a %ault a, (#<ol<! o#! or or! pha*!* a#" +rou#"- or
a, o''ur o#l, 0!tw!!# pha*!*& I# a +rou#" %ault or !arth %ault- 'urr!#t %low*
(#to th! !arth& Th! pro*p!'t(<! *hort '(r'u(t 'urr!#t o% a pr!"('ta0l! %ault 'a# 0!
'al'ulat!" %or o*t *(tuat(o#*& I# pow!r *,*t!*- prot!'t(<! "!<('!* 'a# "!t!'t %ault
'o#"(t(o#* a#" op!rat! '(r'u(t 0r!ak!r* a#" oth!r "!<('!* to l((t th! lo** o% *!r<('!
"u! to a %a(lur!&
I# a pol,pha*! *,*t!- a %ault a, a%%!'t all pha*!* !8uall, wh('h (* a
*,!tr('al %ault& I% o#l, *o! pha*!* ar! a%%!'t!"- th! r!*ult(#+ a*,!tr('al
%ault 0!'o!* or! 'opl('at!" to a#al,/!& Th! a#al,*(* o% th!*! t,p!* o% %ault*
(* o%t!# *(pl(%(!" 0, u*(#+ !tho"* *u'h a* *,!tr('al 'opo#!#t*&
Th! "!*(+# o% *,*t!* to "!t!'t a#" (#t!rrupt pow!r *,*t! %ault* (* th! a(#
o07!'t(<! o% pow!r2*,*t! prot!'t(o#&
El!'tr('al %ault (* th! "!<(at(o# o% <olta+!* a#" 'urr!#t* %ro #o(#al <alu!* or
*tat!*& U#"!r #oral op!rat(#+ 'o#"(t(o#*- pow!r *,*t! !8u(p!#t or l(#!* 'arr,
#oral <olta+!* a#" 'urr!#t* wh('h r!*ult* (# a *a%!r op!rat(o# o% th! *,*t!&
But wh!# %ault o''ur*- (t 'au*!* !='!**(<!l, h(+h 'urr!#t* to %low wh('h 'au*!* th!
"aa+! to !8u(p!#t* a#" "!<('!*& Fault "!t!'t(o# a#" a#al,*(* (* #!'!**ar, to
*!l!'t or "!*(+# *u(ta0l! *w(t'h+!ar !8u(p!#t*- !l!'tro!'ha#('al r!la,*- '(r'u(t
0r!ak!r* a#" oth!r prot!'t(o# "!<('!*&
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Th!r! ar! a(#l, two t,p!* o% %ault* (# th! !l!'tr('al pow!r *,*t!& Tho*! ar!
*,!tr('al a#" u#*,!tr('al %ault*&
T,p! o% Fault*
Th!r! ar! two t,p!* o% %ault* wh('h 'a# o''ur o# a#, tra#*(**(o# l(#!* 0ala#'!"
%ault* a#" u#0ala#'!" %ault* al*o k#ow# a* *,!tr('al a#" a*,!tr('al %ault*
r!*p!'t(<!l,& Mo*t o% th! %ault* that o''ur o# pow!r *,*t!* ar! #ot th! 0ala#'!"
thr!! pha*! %ault*- 0ut th! u#0ala#'!* %ault*& I# a""(t(o#- %ault* 'a# 0! 'at!+or(/!"
a* th! *hu#t %ault*- *!r(!* %ault* a#" *(ulta#!ou* %ault*& I# th! a#al,*(* o% pow!r
*,*t! u#"!r %ault 'o#"(t(o#*- (t (* #!'!**ar, to ak! a "(*t(#'t(o# 0!tw!!# th!
t,p!* o% %ault to !#*ur! ; th! 0!*t r!*ult* po**(0l! (# th! a#al,*(*& Two !=apl!* o%
*!r(!* %ault ar! wh!# th! *,*t! hol"* o#! or two 0rok!# l(#!*- or (p!"a#'!
(#*!rt!" (# o#! or two l(#!*& I# th! r!al worl" a *!r(!* %ault* tak!* pla'!- %or
!=apl!- wh!# '(r'u(t 0r!ak!r* 'o#trol* th! l(#!* a#" "o #ot op!# all thr!! pha*!*-
(# th(* 'a*!- o#! or two pha*!* o% th! l(#! a, 0! op!# wh(l! th! oth!r* (* 'lo*!"&
S!r(!* %ault* ar! 'hara't!r(/!" 0, (#'r!a*! o% <olta+! a#" %r!8u!#', a#" %all (#
'urr!#t (# th! %ault!" pha*!*& O#! o% th! o*t (porta#t 'hara't!r(*t('* o% *hu#t
%ault* (* th! (#'r!!#t th! 'urr!#t *u%%!r* a#" %all (# <olta+! a#" %r!8u!#',& Shu#t
%ault* 'a0 0! 'la**(%(!" (#to %our 'at!+or(!*&
5& L(#!2to2+rou#" %ault th(* t,p! o% %ault !=(*t* wh!# o#! pha*! o% a#,
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%all(#+ tr!! or a#, oth!r (#'("!#t& ;4 o% all tra#*(**(o# l(#!* %ault* ar! 'la**(%(!"
u#"!r th(* 'at!+or, &
3& L(#!2to2l(#! %ault a* a r!*ult o% h(+h w(#"*- o#! pha*! 'oul" tou'h a#th!r pha*!
) l(#!2to2l(#! %ault tak!* pla'!& 56 o% all tra#*(**(o# l(#!* %ault* ar! 'o#*("!r!"
l(#!2to2l(#! %ault*
& Dou0l! l(#!2to2+rou#" %all(#+ tr!! wh!r! two pha*!* 0!'o! (# 'o#ta't w(th
th! +rou#" 'oul" l!a" to th(* t,p! o% %ault& I# a""(t(o#- two pha*!* w(ll 0! (#<ol<!"
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(#*t!a" o% o#! at th! l(#!2to2+rou#" %ault* *'!#ar(o*& 54 o% all tra#*(**(o# l(#!*
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th(* t,p! o% %ault #ot o%t!# !=(*t* wh('h 'a# 0! *!!# %ro (t* *har! o% 6 o% all
tra#*(**(o# l(#!* %ault* 55& Th! %(r*t thr!! o% th!*! %ault* ar! k#ow# a*
a*,!tr('al %ault*&
Ba*!" o# *,!tr, th! %ault* ar! 'la**(%(!" a*2
5&S,!tr('al %ault*
Th!*! ar! <!r, *!<!r! %ault* a#" o''ur (#%r!8u!#tl, (# th! pow!r *,*t!*& Th!*!
ar! al*o 'all!" a* 0ala#'!" %ault* a#" ar! o% two t,p!* #a!l, l(#! to l(#! to l(#! to
+rou#" .L2L2L2G1 a#" l(#! to l(#! to l(#! .L2L2L1&
S,!tr('al %ault*
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O#l, 326 p!r'!#t o% *,*t! %ault* ar! *,!tr('al %ault*& I% th!*! %ault* o''ur-
*,*t! r!a(#* 0ala#'!" 0ut r!*ult* (# *!<!r! "aa+! to th! !l!'tr('al pow!r
*,*t! !8u(p!#t*&
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'(r'u(t 0r!ak!r* a#" rat(#+ o% th! prot!'t(<! *w(t'h+!ar&
3&U#*,!tr('al %ault*
Th!*! ar! <!r, 'oo# a#" l!** *!<!r! tha# *,!tr('al %ault*& Th!r! ar! a(#l,
thr!! t,p!* #a!l, l(#! to +rou#" .L2G1- l(#! to l(#! .L2L1 a#" "ou0l! l(#! to
+rou#" .LL2G1 %ault*&
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th(* t,p!&
It 'au*!* th! 'o#"u'tor to ak! 'o#ta't w(th !arth or +rou#"& 56 to 34 p!r'!#t o%
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oth!r a(#l, wh(l! *w(#+(#+ o% l(#!* "u! to w(#"* a#" 62 54 p!r'!#t o% th! %ault*
ar! o% th(* t,p!&
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Th!*! ar! al*o 'all!" u#0ala#'!" %ault* *(#'! th!(r o''urr!#'! 'au*!* u#0ala#'! (#
th! *,*t!& U#0ala#'! o% th! *,*t! !a#* that that (p!"a#'! <alu!* ar!
"(%%!r!#t (# !a'h pha*! 'au*(#+ u#0ala#'! 'urr!#t to %low (# th! pha*!*& Th!*! ar!
or! "(%%('ult to a#al,/! a#" ar! 'arr(!" 0, p!r pha*! 0a*(* *((lar to thr!! pha*!
0ala#'!" %ault*&