for ferke-11.4.11
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INDEX
1.0 INTENT OF DESIGN PHILOSOPHY -03
2.0 GENERAL DESIGN & ENGINEERING -03
3.0 SUB STATION DESIGN DETAILS -05
4.0 SWITCHYARD EUIP!ENTS -0"
4.1 CIRCUIT BREA#ER -0"
4.2 ISOLATOR -10
4.3 CURRENT TRANSFOR!ER -14
DESIGN PHILOSOPHY
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4.4 POTENTIAL TRANSFOR!ER -20
4.5 LIGHTNING ARRESTER -21
4." INSULATORS & HARDWARE -24
4.$ SWITCHYARD PROTECTION CONTROL & RELAY PANEL -2%
4. EARTHING & LIGHTNING PROTECTION -2$
4.10 HT CABLES -2
4.11 LIGHTING SYSTE! FOR SWITCHYARD -30
4.12 25 !'A() 225*' SHUNT REACTOR -31
4.14 DRAWINGS) DATA AND !ANUAL -3%
5.0 ANNEXURE -3%
1. PRO+ECT DESCRIPTION ,
Project for interconnection of electrical networks of Mali and Ivory Coast envisages in
its initial phase of realization of a 225kV line connecting the existing station of Ferkessedogo in
Ivory Coast to the existing !5"kV station of #ego$
%his design philosophy is intended to cover the re&ire'ents of D/ E/(/ for
the extension of one 225kV (ine )ay with 2"MV*r +eactor in 225kV F,+-,##./01/0 s)
station as per I,C standards and %echnical #pecification$
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2. SUB STATION DESIGN DETAILS
2.1 225*' FER#ESSDOUGOU EXISTING SS
.esign criteria for 225kV syste' details are as per %echnical specification and I,CI#
standard$
%he 'ajor activities for the proposed extension of Ferkessdogo #)station
,xtension of existing 225kV *l'ini' IP# t)e and installation of new 225kV (ine )ay
with 2"MV*r #hnt +eactor as per (ayot drawing$
,arth 'at3 (ighting and (ightning will )e covered for the proposed extension )ays and %wo
n')ers of !4' height (C(P is provided for (ighting ill'ination and (ightning protection$
%wo n')ers of M- 6ay Marshalling -iosk7 for (% *C power spply will )e provided in
the switchyard for axiliary spply to +eactor and other e&ip'ents 6C3 1/#3 C%8 9 V%873
one is for #ikasso (ine ay and another one is for +eactor ay$
,xtension of existing control roo' to locate the new control and protection panel for theproposed extension )ay$
Ca)le trench to acco''odate control and power ca)les for the proposed extension line )ay$
%he #ingle line diagra'3 Plan (ayot3 and section layot are prepared )ased on %echnical
specification3 I,C I# standard and existing data collected fro' site$
C/67/8 89/7/9,
Mini'' te'peratre : !2;C
Maxi'' te'peratre: 5" ;C
*ltitde is less than !"""'
.aily 'axi'' average te'peratre : o'inal syste' voltage 225 kV as per (ayot dwg$ no$!?@"AA?,?(*B?""A?"4$2 ighest syste' voltage 2
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< Main s#ingle s6*($ +igid s7
5Fll wave i'plse withstandvoltage 6!$25" 'icrosec$7 !"5" kVp
4
/ne 'inte power fre&ency
withstand voltage
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+ated #hort %i'e Crrent
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>o'inal syste' Voltage 225kV
Fre&ency 5"z
+ated #hort %i'e Crrent
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Metering 9 C0 =5!* Cl:"$53 I#FG5 ? =$5V*?
+eactor .iff$ Protn$ =5!* Cl:5P2" ? =$5V*?
A$A$!$< +ating of +eactor ay %ank #ide ! CoreCore +atio Class Vk rden +ct
Metering 9 C0 =5!* Cl:"$53 I#FG5 ? =$5V*?
3.3.2 C=((7 '97 T(>9(6(
A$A$2$! +ating of (ine ay A CoreCore +atio Class
Core?! 6Protection7 225kVHA!!"VHA !""V*
Core?2 6Protection7 225kVHA!!"VHA !""V*
Core?A 6Metering7 225kVHA!!"VHA =5V*
3.4 L/?7/ A((7(
%ype Metal /xide3 /tdoor
>o'inal syste' Voltage 225kV
ighest syste' Voltage 2
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4. E(7?/ S:76
%he Calclations of the earthing network are designed according to the 'ethod
reco''ended in I,,, #tandard D" 6I,,, gide for safety in *C s)stations grondings7$
,arth 'at is covered for the proposed extension )ay and ! 'eter )eyond fencing$ %he ,arth
'at designed for
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(ightning Protection for the proposed extension )ay is done sing 1#E@5 shield wire
)ased on +azevig 'ethod calclation and (C(P 6(ightning c' lighting pole7 is sed to protect the
area which is not covered )y shield wire$
Control roo' )ilding is protected )y sing 25xA'' or A5'' Copper condctor )ased on
I#: 2A"@?!@D@ 6Indian #tandard Code of Practice for Protection against (ightning7$
1rond electrodes of earthing syste' are !@'' .ia3 A' Copper clad steel rod electrode$
For the yard protection3 /tside and inside zone is protected with shield wire at each
e&ip'ent and condctor level$ %he control roo' )ilding is protected )y horizontal 'esh
condctor fixed on the roof of the )ilding will not )e 'ore than 2"' x !"' in general$ orizontal
'esh shold )e cla'ped on the roof )y sing 1I cla'ps at spacing of not 'ore than two 'eters$
%he prpose of the control roo' )ilding protection is to esti'ate the n')er of (ightning
electrodes and down condctors re&ired$ %he n')er of down condctor is o)tained )y thefollowing two criteria$
i7 /ne pls an additional one for each A""'2or a part thereof3 in excess of the first !""'2
ii7 /ne for each A"' of peri'eter of the strctre protected$
%. I=6/7/9 S:76,
Outdoor lighting ill'ination design is done sing C1 lx and Indoor (ighting is sing ajaj)ased on CIP 'anal$
%he s) station and control roo' ill'ination syste' shall consist of the following:
A( A@( I=6/7/9 L@ T:; 9> >/7=(
In #)station/n e&ip'ent 5" lx !x
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%he lighting syste' of a particlar area whether otdoor or indoor shold )e designed in sch a
way that nifor' ill'ination is achieved$ *s far as possi)le any dark spots shold )e avoided$ %his
re&ired carefl placing of the l'inaries3 selection of proper 'onting heights$
". AC D/7(/=7/9 9( & DC D/7(/=7/9 9(,
".1 AC D/7(/=7/9 9(,
Inco'er spply for ,xtended *C. is taken fro' existing
will )e provided with the following ratings
for ! sec$ #ingle and three?phase *C #pply are needed in a s)station for Motor3 eating 9
lighting spply$
%he *C. with following /tgoing feeder ratings:
a7 (ine ay M- 6
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e7 +eactor ay C+P #pply?2 6!4*7 f7 (ine ay C+P #pply?2 6!4*7 g7 #C*.* Panel 6!4*7 h7 Fi)er optic panel 6!4*7 i7 #tation MI #erve 6!4*7
j7 ,'ergency (ighting 6!4*7
4$' DC D/7(/=7/9 9(,
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