Medium Voltage Locking Systems
41
7/18/2019 Medium Voltage Locking Systems http://slidepdf.com/reader/full/medium-voltage-locking-systems 1/41 ■ Merlin Gerin ■ Square D ■ Telemecanique W WH HA A T T Y YO OU U H HA AV VE E T TO O R RE EM ME EM MB BE ER R I It t i i s s b be et tt te er r t to o h ha av ve e n no o l lo oc ck ki i n ng g s sy ys st te em m t th ha an n t to o h ha av ve e a an n i in nc co om mp pl le et te e l lo oc ck ki i n ng g s sy ys st te em m. . C C o o m m b b i i n n i i n n g g l l o o c c k k i i n n g g w w i i t t h h o o p p e e r r a a t t i i n n g g i i n n s s t t r r u u c c t t i i o o n n s s i i s s e e x x t t r r e e m m e e l l y y d d a a n n g g e e r r o o u u s s . . A A m m i i s s t t a a k k e e c c a a n n l l e e a a d d t t o o a a d d e e a a t t h h a a n n d d l l e e g g a a l l p p r r o o c c e e e e d d i i n n g g s s a a g g a a i i n n s s t t t t h h e e p p e e r r s s o o n n r r e e s s p p o o n n s s i i b b l l e e f f o o r r t t h h e e f f a a i i l l u u r r e e . . T T h h r r e e e e t t y y p p e e s s o o f f l l o o c c k k i i n n g g s s h h o o u u l l d d b b e e c c o o m m m m i i t t t t e e d d t t o o m m e e m m o o r r y y , , t t h h o o s s e e r r e e l l a a t t e e d d t t o o : : ■ o o p p e e r r a a t t i i n n g g o o f f i i s s o o l l a a t t i i n n g g d d e e v v i i c c e e s s ; ; ■ o o p p e e r r a a t t i i n n g g o o f f e e a a r r t t h h i i n n g g s s w w i i t t c c h h e e s s ; ; ■ c c o o n n t t r r o o l l l l e e d d a a c c c c e e s s s s t t o o d d i i f f f f e e r r e e n n t t c c o o m m p p a a r r t t m m e e n n t t s s . . Medium voltage locking systems d a te 0 5 / 9 7 - B •5 •1 - r evised 0 5 / 9 7
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Medium Voltage Locking Systems
Transcript of Medium Voltage Locking Systems
7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 1/41
■ Merlin Gerin ■ Square D ■ Telemecanique
W WHHAATT YYOOUU HHAAVVEE TTOO RREEMMEEMMBBEERR
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Medium voltage locking systems
da t e
0 5 / 9 7
-B • 5 •
1 -
r e v i s e d
0 5 / 9 7
7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 2/41
7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 3/41
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Locking systems guarantee:
■ safety of personnel;
■ safety of equipment;
■ continuity of operation.
Medium voltage locking systems
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http://slidepdf.com/reader/full/medium-voltage-locking-systems 4/41
33 TTYYPPEESS
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Selection of a locking system depends on the environment,
the complexity of operation and the cost.
Medium voltage locking systems
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SSAALLEESS
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7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 5/41
66 AACCTTIIOONNSS
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Medium voltage locking systems
page 5
da t e
0 5 / 9 7
-B • 5 •
1 -
r e v i s e d
0 5 / 9 7
7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 6/41
7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 7/41
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To achieve full locking, not only internal locking should be
considered; interlocking systems should be considered,
which require possession of the installation’s full single
line layout (at the various voltage levels) and of the particular
operating conditions for the switchboards in question.
Medium voltage locking systems
page 7
da t e
0 5 / 9 7
-B • 5 •
1 -
r e v i s e d
0 5 / 9 7
7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 8/41
IINNTTEERRLLOOCCKKIINNGG SSYYSSTTEEMMSS
BBEETTW WEEEENN EEQQUUIIPPMMEENNTT
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Medium voltage locking systems
page 8
da t e
0 5 / 9 7
-B • 5 •
1 -
r e v i s e d
0 5 / 9 7
MV
switchboardincomer
Sub-switchboardfeeder
Transformerfeeder
MV
switchboardincomer
Upstreamisolating devices
Downstreamisolating devices
LV switchboard MV sub-switchboard
Generator incomer Transformer incomer
Coupling
1
2
3
3
3
G
1
7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 9/41
PPRROOHHIIBBIITTIINNGG OOPPEERRAATTIIOONN
OOFF AA DDIISSCCOONNNNEECCTTOORR
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The disconnector or busbar bridge is permanently locked in its twopositions (open-closed).
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Medium voltage locking systems
page 9
da t e
0 5 / 9 7
-B • 5 •
1 -
r e v i s e d
0 5 / 9 7
D
90°
D
To operate the disconnector:
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7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 10/41
PPRROOHHIIBBIITTIINNGG OOPPEERRAATTIIOONN
OOFF AA DDIISSCCOONNNNEECCTTOORR
OORR BBUUSSBBAARR BBRRIIDDGGEE
UUNNDDEERR LLOOAADD
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EE XX AAMM PP LL EE 22 :: II NN CC OO MM EE RR CC UU BB II CC LL EE WW II TT HH BB UU SS BB AARR BB RR II DD GG EE
CC aa ss ee 11
Medium voltage locking systems
page 10
da t e
0 5 / 9 7
-B • 5 •
1 -
r e v i s e d
0 5 / 9 7
DAUpstreamcubicle
Busbar bridge
incomerDA
To operate the busbar bridge:
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7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 11/41
PPRROOHHIIBBIITTIINNGG OOPPEERRAATTIIOONN
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CC aa ss ee 22
Medium voltage locking systems
page 11
da t e
0 5 / 9 7
-B • 5 •
1 -
r e v i s e d
0 5 / 9 7
M M1 M2 M3Central lock 3 motor feeders
BUSBAR BRIDGE incomer
M1 M2 M3
M M M
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To operate the busbar bridge, the incomer must be off-load:
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☞ Note: locks prohibiting operation under load, which are fitted onthe busbar bridge carriages, are insufficient for prohibitinginterchangeability of two identical carriages on the same switchboard.One must therefore provide:■ either, foolproof systems on the cubicles;■ or, permanent warning/instructional signs on the carriages.
7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 12/41
PPRROOHHIIBBIITTIINNGG PPLLUUGGGGIINNGG
IINN AANNDD W WIITTHHDDRRAAW WIINNGG
OOFF CCIIRRCCUUIITT--BBRREEAAKKEERRSS
AANNDD CCOONNTTAACCTTOORRSS
UUNNDDEERR LLOOAADD
AAss ff oorr aann iissoollaattiinngg ddeevviiccee,, cciirrccuuiitt--bbrreeaakkeerr aanndd ccoonnttaaccttoorr pplluuggggiinngg iinn aannddwwiitthhddrraawwiinngg ooppeerraattiioonnss mmuusstt bbee mmaaddee ddeeppeennddeenntt oonn pprriioorr ttrriippppiinngg ooff tthheerreelleevvaanntt cciirrccuuiitt--bbrreeaakkiinngg ddeevviiccee..
Medium voltage locking systems
page 12
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Contactor Circuit-breakerThis locking system is functionalon our switchgear and forms anintegral part of the device.
PPRROOHHIIBBIITTIINNGG
TTHHEE RREEMMOOVVAALL OOFF
VVOOLLTTAAGGEE TTRRAANNSSFFOORRMMEERR
CCIIRRCCUUIITT--BBRREEAAKKEERRSS
W WHHEENN LLIIVVEE
To remove MV fuses:
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☞ Note:
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7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 13/41
PPRROOHHIIBBIITTIINNGG CCLLOOSSIINNGG
OOFF TTHHEE EEAARRTTHHIINNGG
SSW WIITTCCHH W WHHEENN
TTHHEE CCUUBBIICCLLEE AANNDD
CCAABBLLEESS AARREE LLIIVVEE
Medium voltage locking systems
page 13
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AAnn eeaarrtthhiinngg sswwiittcchh iiss aa ddeevviiccee ff oorr sshhoorrtt--cciirrccuuiittiinngg aanndd eeaarrtthhiinngg tthhee 33--pphhaasseessyysstteemm ff oorrmmeedd bbyy aa ccuubbiiccllee’’ss ccaabblleess.. IItt iiss ooppeerraatteedd iinn aa ddee--eenneerrggiisseeddccoonnddiittiioonn,, oorr aa bboolltteedd sshhoorrtt--cciirrccuuiitt ccaann ooccccuurr ..■
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EE XX AAMM PP LL EE 11 :: II NN CC OO MM EE RR CC UU BB II CC LL EE WW II TT HH WW II TT HH DD RR AAWW AABB LL EE CC II RR CC UU II TT -- BB RR EE AAKK EE RR
A1A2
A2
A1
INCOMER cubicleUPSTREAM cubicle
not supplied by Schneider
To close the earthing switch for the incomer cubicle:
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■ lloocckk tthhee uuppssttrreeaamm iissoollaattiinngg ddeevviiccee iinn aann ““ooppeenn”” ppoossiittiioonn((kkeeyy AA22 mmaayy bbee rreemmoovveedd));;
■ uunnlloocckk aanndd cclloossee tthhee eeaarrtthhiinngg sswwiittcchh ooff tthhee iinnccoommeerr ccuubbiiccllee ((kkeeyy AA22 ccaappttiivvee));;■
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7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 14/41
Medium voltage locking systems
page 14
da t e
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P
Sub-switchboardFEEDER cubicle
DOWNSTREAM cubiclenot supplied by Schneider
F
SF
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EE XX AAMM PP LL EE 22 :: SS UU BB -- SS WW II TT CC HH BB OO AARR DD FF EE EE DD EE RR CC UU BB II CC LL EE WW II TT HH RR EE MM OO VV AABB LL EE
CC II RR CC UU II TT -- BB RR EE AAKK EE RR AANN DD UU PP SS TT RR EE AAMM EE AARR TT HH II NN GG SS WW II TT CC HH
To close the earthing switch for the feeder cubicle:
■ lloocckk tthhee ff eeeeddeerr ccuubbiiccllee iinn tthhee ““ooppeenn”” ppoossiittiioonn ((kkeeyy DD mmaayy bbee rreemmoovveedd)) ;;■ lloocckk tthhee uuppssttrreeaamm ccuubbiiccllee ddiissccoonnnneeccttoorrss iinn tthhee ““ooppeenn”” ppoossiittiioonn
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To unlock the rear access panel of the cubicle:
■ lloocckk tthhiiss eeaarrtthhiinngg sswwiittcchh iinn tthhee ““cclloosseedd”” ppoossiittiioonn uussiinngg kkeeyy PP ((kkeeyy PP mmaayy bbee rreemmoovveedd));; tthhiiss kkeeyy tthheenn eennaabblleess tthhee sswwiittcchhbbooaarrdd rreeaarr ppaanneell ttoo bbee uunnlloocckkeedd..
PPRROOHHIIBBIITTIINNGG CCLLOOSSIINNGG
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7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 15/41
7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 16/41
PPRROOHHIIBBIITTIINNGG
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CC II RR CC UU II TT -- BB RR EE AAKK EE RR AANN DD DD II SS CC OO NN NN EE CC TT OO RR
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.
Medium voltage locking systems
page 16
da t e
0 5 / 9 7
-B • 5 •
1 -
r e v i s e d
0 5 / 9 7
7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 17/41
PPRROOHHIIBBIITTIINNGG
TTHHEE CCOOUUPPLLIINNGG OOFF
SSEEVVEERRAALL IINNCCOOMMEERRSS
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■ 1 generator incomer (back-up incomer);■ 1 transformer incomer (normal incomer) with a coupling cubicle.
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Medium voltage locking systems
page 17
da t e
0 5 / 9 7
-B • 5 •
1 -
r e v i s e d
0 5 / 9 7
Busbar 1 Busbar 2
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7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 18/41
PPRROOHHIIBBIITTIINNGG
TTHHEE CCOOUUPPLLIINNGG OOFF
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Medium voltage locking systems
page 18
da t e
0 5 / 9 7
-B • 5 •
1 -
r e v i s e d
0 5 / 9 7
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7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 19/41
PPRROOHHIIBBIITTIINNGG
TTHHEE CCOOUUPPLLIINNGG OOFF
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Medium voltage locking systems
page 19
da t e
0 5 / 9 7
-B • 5 •
1 -
r e v i s e d
0 5 / 9 7
Busbar 1 Busbar 2
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Coupling 1-2
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C2
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C2
7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 20/41
LLOOCCKKIINNGG OOFF DDOOUUBBLLEE
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Coupling, or equalising the potential of the two busbars, must beundertaken by the coupling cubicle specifically provided, and not bythe busbar disconnectors for one of the incomer or feeder cubicles(they have no closing capacity).
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b) Uncoupled busbarsTThhee ttwwoo bbuussbbaarr ddiissccoonnnneeccttoorrss ff oorr aann iinnccoommeerr oorr ff eeeeddeerr ccuubbiiccllee ccaannnnoott bbee cclloosseedd ssiimmuullttaanneeoouussllyy..
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1
1
:
:
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■ in cubicle 1:
■
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.
■ in coupling cubicle C :■ lloocckkss DDCC lliinnkk cciirrccuuiitt--bbrreeaakkeerr ttoo tthhee bbuussbbaarr ddiissccoonnnneeccttoorrss aanndd pprroohhiibbiitttthheeiirr ooppeerraattiioonn uunnddeerr llooaadd..■ lloocckkss SSCC aallllooww tthhee lloocckk ooff tthhee bbuussbbaarr ddiissccoonnnneeccttoorrss iinn cclloossee ppoossiittiioonn..
Medium voltage locking systems
page 20
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LLOOCCKKIINNGG OOFF DDOOUUBBLLEE
BBUUSSBBAARR SSW WIITTCCHHBBOOAARRDDSS
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c
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CC OO NN NN EE CC TT II NN GG BB UU SS BB AARR II NN PP AARR AALL LL EE LL
Aim: tt oo tt rr aa nn ss ff ee rr tt hh ee bb uu ss bb aa rr 22 ll oo aa dd tt oo tt hh ee bb uu ss bb aa rr 11..Operating sequence:■
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.
Medium voltage locking systems
page 21
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Cubicle 1 Coupling cubicle C Cubicle nCubicle n
Busbar 1
Busbar 2
D1 D1
2 1
S1 S1 SC
D1
DC
SC
DC
DC
PC
C PC SC SC
Locking of couplingcircuit-breaker trip
Coupling circuit-breakerclosing/plugging-in control
Sn N Sn N S1 N N C Sn N Sn N
Y X Z
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LLOOCCKKIINNGG OOFF DDOOUUBBLLEE
BBUUSSBBAARR SSW WIITTCCHHBBOOAARRDDSS
(
(
c
c
o
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n
n
t
t
’
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d
d
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)
EE XX AAMM PP LL EE 22 :: CC OO UU PP LL II NN GG CC UU BB II CC LL EE WW II TT HH OO UU TT DD II SS CC OO NN NN EE CC TT OO RR
OOppeerraattiioonn iiddeennttiiccaall ttoo tthhaatt ooff eexxaammppllee 11,, eexxcceepptt::■ cceennttrraal
l lloocckk ZZ nnoo l
loonnggeerr eexxi
issttss;;
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.
.
Medium voltage locking systems
page 22
da t e
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-B • 5 •
1 -
r e v i s e d
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Cubicle 1 Coupling cubicle C Cubicle nCubicle n
D1 D1
2 1
S1 S1
D1
PC
Locking of couplingcircuit-breaker trip
Coupling circuit-breakerclosing/plugging-in control
Sn N Sn N S1 N Sn N Sn N
Y X
N PC
Busbar 1
Busbar 2
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LLOOCCKKIINNGG OOFF
SSW WIITTCCHHBBOOAARRDDSS W WIITTHH
DDOOUUBBLLEE CCLLIIPP CCUUBBIICCLLEESS
TThheessee sswwiittcchhbbooaarrddss ff uullff iill tthhee ssaammee ff uunnccttiioonn aass ddoouubbllee bbuussbbaarr sswwiittcchhbbooaarrddss,,iinn tteerrmmss ooff sswwiittcchhiinngg iinnccoommeerr aanndd ff eeeeddeerr ccuubbiicclleess,, wwiitthhoouutt iinntteerrrruuppttiioonn ooff sseerrvviiccee,, ttoo eeiitthheerr bbuussbbaarr..
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Medium voltage locking systems
page 23
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-B • 5 •
1 -
r e v i s e d
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CouplingFeeder 1
Busbar 1
Busbar 2
A
S1A
S1
PC
S1 N
Y
X
Locking of couplingcircuit-breaker trip
Coupling circuit-breakerclosing/plugging-in control
N PC
OOppeerraattiioonn iiss iiddeennttiiccaall ttoo tthhaatt ooff eexxaammppllee 22 oonn pprreevviioouuss ppaaggee..IInntteerrlloocckkiinngg ssyysstteemmss bbeettwweeeenn tthhee eeaarrtthhiinngg sswwiittcchh ff oorr tthhee bbuussbbaarr 22 ff eeeeddeerrccuubbiiccllee aanndd tthhee bbuussbbaarr 11 ccuubbiiccllee cciirrccuuiitt--bbrreeaakkeerr sshhoouulldd bbee pprroovviiddeedd ((kkeeyy AA))..
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AAPPPPEENNDDIIXX 11
MMCCsseett FFUUNNCCTTIIOONNAALL
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MM CC ss ee tt WW II TT HH OO UU TT AA VV OO LL TT AAGG EE TT RR AANN SS FF OO RR MM EE RR UU NN II TT
Medium voltage locking systems
page 1
da t e
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-B • 5 •
1 -
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MV circuit-breaker
access door a
b
c
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7/18/2019 Medium Voltage Locking Systems
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AAPPPPEENNDDIIXX 11
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Medium voltage locking systems
page 2
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7/18/2019 Medium Voltage Locking Systems
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TT OO DD EE LL II VV EE RR EE QQ UU II PP MM EE NN TT OO NN TT II MM EE WW HH II CC HH OO FF FF EE RR SS FF UU LL LL OO PP EE RR AATT II NN GG SS AAFF EE TT YY
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AAPPPPEENNDDIIXX 22
PPEERRFFOORRMMIINNGG AA LLOOCCKKIINNGG
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Medium voltage locking systems
page 1
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AAPPPPEENNDDIIXX 22
PPEERRFFOORRMMIINNGG AA LLOOCCKKIINNGG
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page 2
da t e
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90°
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AAPPPPEENNDDIIXX 22
PPEERRFFOORRMMIINNGG AA LLOOCCKKIINNGG
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Medium voltage locking systems
page 3
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GLA GLB
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A.9.1
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R
R
e
e
m
m
o
o
v
v
a
a
b
b
l
l
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k
k
e
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y
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O
O
K
K
e
e
y
y
m
m
i
i
s
s
s
s
i
i
n
n
g
g
• CCaappttiivvee kkeeyy
Locking of an MV/LV transformer substation
G
G
L
L
C
C
s
s
w
w
i
i
t
t
c
c
h
h
b
b
o
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a
a
r
r
d
d
c
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u
b
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i
i
c
c
l
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e
e
n
n
o
o
.
.
2
2
3
3
C
C
.
.
2
2
3
3
.
.
1
1
;
;
C
C
.
.
2
2
3
3
.
.
2
2
;
;
…
…
GLC
LV
LV
LV
C.23.1
MV LV
23
C.23.1
Ø
ØRReemmo
ovvaab
bl
le
e kkeey
y
O
O
K
K
e
e
y
y
m
m
i
i
s
s
s
s
i
i
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n
g
g
•
C
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a
a
p
p
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e
k
k
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y
y
7/18/2019 Medium Voltage Locking Systems
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AAPPPPEENNDDIIXX 22
PPEERRFFOORRMMIINNGG AA LLOOCCKKIINNGG
DDEESSIIGGNN SSTTUUDDYY
(
(
c
c
o
o
n
n
t
t
’
’
d
d
)
)
Medium voltage locking systems
page 4
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BB AASS II CC LL OO CC KK II NN GG SS YY SS TT EE MM SS
a) Locking system to lock a circuit-breaker in the “withdrawn” position
b) Lock prohibiting operation under load of an isolating switch carriage((lloocckkiinngg iinn ttwwoo ppoossiittiioonnss)) aanndd lloocckk sseeccuurriinngg tthhee ccaarrrriiaaggee iinn tthhee ““wwiitthhddrraawwnn””ppoossiittiioonn
c) Locking system to lock an earthing switch in the “open” and “closed”
earthing switchlocked closed
earthing switchlocked open
Ø
Ø
R
R
e
e
m
m
o
o
v
v
a
a
b
b
l
l
e
e
k
k
e
e
y
y
O
O
K
K
e
e
y
y
m
m
i
i
s
s
s
s
i
i
n
n
g
g
•C
C
a
a
p
p
t
t
i
i
v
v
e
e
k
k
e
e
y
y
7/18/2019 Medium Voltage Locking Systems
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AAPPPPEENNDDIIXX 22
PPEERRFFOORRMMIINNGG AA LLOOCCKKIINNGG
DDEESSIIGGNN SSTTUUDDYY
(
(
c
c
o
o
n
n
t
t
’
’
d
d
)
)
Medium voltage locking systems
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e) Locks for locking plug-in terminals of a power transformer
H
H
a
a
v
v
e
e
t
t
h
h
e
e
t
t
r
r
a
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n
n
s
s
f
f
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r
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m
m
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s
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p
p
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r
r
s
s
p
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e
c
c
i
i
f
f
y
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t
t
h
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e
e
t
t
y
y
p
p
e
e
o
o
f
f
l
l
o
o
c
c
k
k
s
s
t
t
o
o
b
b
e
e
o
o
r
r
d
d
e
e
r
r
e
e
d
d
.
.
f) Doors locks
Ø
Ø
R
R
e
e
m
m
o
o
v
v
a
a
b
b
l
l
e
e
k
k
e
e
y
y
O
O
K
K
e
e
y
y
m
m
i
i
s
s
s
s
i
i
n
n
g
g
•C
C
a
a
p
p
t
t
i
i
v
v
e
e
k
k
e
e
y
y
d) Rotating cam locks for locking a disconnector in either “open”
or “closed” position
90° 90°
Ø
Ø RReemmoovvaabbllee kkeeyyO
O KKeeyy mmiissssiinngg
• CCaappttiivvee kkeeyy
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AAPPPPEENNDDIIXX 22
PPEERRFFOORRMMIINNGG AA LLOOCCKKIINNGG
DDEESSIIGGNN SSTTUUDDYY
(
(
c
c
o
o
n
n
t
t
’
’
d
d
)
)
DDeessiiggnn pprroocceedduurree
G
G
E
E
N
N
E
E
R
R
A
A
L
L
I
I
N
N
S
S
T
T
R
R
U
U
C
C
T
T
I
I
O
O
N
N
S
S
➊ Draw the switchboard single line layout and show the closed doors,as well as the devices withdrawn and open.
➋ Complete the single line layout for upstream and downstreamequipment, if known, that is linked directly to our equipment.
➌ Schematically represent our equipment’s internal locking systems.IInn tthhee ccaassee ooff ssppeecciiaall ccuubbiicclleess,, tthhee lloocckkiinngg ssyysstteemmss wwiillll bbee eennssuurreedd bbyy lloocckkssoorr ssiimmppllee mmeecchhaanniissmmss..
➍ Draw up an inventory of locking conditions to be fulfilled in relationto the cubicles encountered.
■
i
i
n
n
c
c
o
o
m
m
e
e
r
r
:
:
t
t
r
r
a
a
n
n
s
s
f
f
o
o
r
r
m
m
e
e
r
r
,
,
l
l
i
i
n
n
e
e
,
,
g
g
e
e
n
n
e
e
r
r
a
a
t
t
o
o
r
r
…
…
■
f
f
e
e
e
e
d
d
e
e
r
r
:
:
t
t
r
r
a
a
n
n
s
s
f
f
o
o
r
r
m
m
e
e
r
r
,
,
m
m
o
o
t
t
o
o
r
r
,
,
c
c
a
a
p
p
a
a
c
c
i
i
t
t
o
o
r
r
…
…
■
c
c
o
o
u
u
p
p
l
l
i
i
n
n
g
g
:
:
…
…
➎ Find out any special locking conditions,
e
e
x
x
p
p
r
r
e
e
s
s
s
s
e
e
d
d
o
o
n
n
t
t
h
h
e
e
c
c
u
u
s
s
t
t
o
o
m
m
e
e
r
r
’
’
s
s
o
o
r
r
d
d
e
e
r
r
,
,
a
a
d
d
d
d
i
i
t
t
i
i
o
o
n
n
a
a
l
l
t
t
o
o
t
t
h
h
o
o
s
s
e
e
m
m
e
e
n
n
t
t
i
i
o
o
n
n
e
e
d
d
i
i
n
n
t
t
h
h
e
e
p
p
r
r
e
e
v
v
i
i
o
o
u
u
s
s
p
p
a
a
r
r
a
a
g
g
r
r
a
a
p
p
h
h
.
.
➏ In relation to the various products involved, be sure of:■ the type of lock
t
t
o
o
u
u
s
s
e
e
;
;
■ the installation options ff oorr tthhee vvaarriioouuss ccuubbiiccllee mmeecchhaanniissmmss..
SS PP EE CC II AALL II NN SS TT RR UU CC TT II OO NN SS
A locking system must be understandable solely by reading the layout.
A
A
n
n
e
e
x
x
p
p
l
l
a
a
n
n
a
a
t
t
o
o
r
r
y
y
d
d
o
o
c
c
u
u
m
m
e
e
n
n
t
t
s
s
h
h
o
o
u
u
l
l
d
d
o
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n
n
l
l
y
y
b
b
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e
p
p
r
r
o
o
d
d
u
u
c
c
e
e
d
d
o
o
n
n
r
r
e
e
q
q
u
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e
e
s
s
t
t
o
o
f
f
t
t
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h
e
e
c
c
u
u
s
s
t
t
o
o
m
m
e
e
r
r
.
.
All locking system layouts must be checked.
A
A
b
b
a
a
d
d
l
l
y
y
d
d
e
e
s
s
i
i
g
g
n
n
e
e
d
d
l
l
o
o
c
c
k
k
i
i
n
n
g
g
s
s
y
y
s
s
t
t
e
e
m
m
i
i
s
s
a
a
s
s
o
o
u
u
r
r
c
c
e
e
o
o
f
f
a
a
c
c
c
c
i
i
d
d
e
e
n
n
t
t
s
s
a
a
n
n
d
d
d
d
i
i
s
s
p
p
u
u
t
t
e
e
s
s
w
w
h
h
i
i
c
c
h
h
c
c
a
a
n
n
l
l
e
e
a
a
d
d
t
t
o
o
l
l
e
e
g
g
a
a
l
l
p
p
r
r
o
o
s
s
e
e
c
c
u
u
t
t
i
i
o
o
n
n
.
.
All locking system layouts must be approved by the customer.
I
If
f
o
ou
u
r
r
s
sc
co
op
pe
e
o
of
f
s
su
u
p
pp
pl
ly
y
i
in
nc
cl
lu
u
d
de
es
s
l
lo
oc
ck
ks
s
t
to
o
b
be
e
i
in
ns
st
ta
al
ll
le
ed
d
o
on
n
u
u
p
ps
st
tr
r
e
ea
am
m
o
or
r
ddoowwnnssttrreeaamm eeqquuiippmmeenntt,, the customer must specify the referencenumbers of the key profiles to be ordered.
IIff wwee hhaavvee ttoo iinnssttaallll lloocckkss aaddddiittiioonnaall ttoo eexxiissttiinngg lloocckkss oonn oouurr eeqquuiippmmeenntt,, the customer must specify the types of locks to be ordered.
S
S
h
h
o
o
u
u
l
l
d
d
t
t
h
h
i
i
s
s
p
p
r
r
o
o
v
v
e
e
i
i
m
m
p
p
o
o
s
s
s
s
i
i
b
b
l
l
e
e
,
,
p
p
a
a
i
i
r
r
i
i
n
n
g
g
o
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f
f
t
t
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k
k
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y
y
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s
o
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n
n
a
a
w
w
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l
l
d
d
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d
d
r
r
i
i
n
n
g
g
s
s
h
h
o
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u
u
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d
d
b
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c
c
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n
s
s
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r
r
e
e
d
d
.
.
Medium voltage locking systems
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AAPPPPEENNDDIIXX 22
PPEERRFFOORRMMIINNGG AA LLOOCCKKIINNGG
DDEESSIIGGNN SSTTUUDDYY
(
(
c
c
o
o
n
n
t
t
’
’
d
d
)
)
SS PP EE CC II AALL II NN SS TT RR UU CC TT II OO NN SS (( cc oo nn tt ’’ dd ) )
It is the Sales Engineer who defines the scope of supply in relation
to locking.Do not underestimate the risks run should locking be omitted foreconomic reasons.
If we know nothing about the upstream and downstream cubicles,
t
t
h
h
e
e
r
r
e
e
a
a
r
r
e
e
3
3
p
p
o
o
s
s
s
s
i
i
b
b
l
l
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c
c
o
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u
u
r
r
s
s
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e
s
s
o
o
f
f
a
a
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c
t
t
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(
(
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p
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r
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d
de
e
r
r
)
):
:
■ do nothing: vveerryy iinnaaddvviissaabbllee..■ install the following permanent instructional/warning sign nneeaarr tthheeooppeerraattiinngg ddeevviiccee aanndd ooff ff eerr tthhee ccuussttoommeerr tthhee ooppttiioonn ooff ppaaddlloocckkiinngg iitt::
T
T
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h
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d
d
b
b
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a
a
v
v
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i
i
d
d
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d
d
;
;
a
a
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t
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u
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a
a
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/
/
w
w
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s
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t
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t
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,
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i
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d
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r
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m
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x
x
l
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c
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i
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n
g
g
s
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s
s
t
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m
m
s
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n
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d
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t
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u
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c
c
t
t
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i
o
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n
n
s
s
.
.
■ lock the earthing switch in the “open” positiona
a
n
n
d
d
i
in
n
d
di
ic
c
a
a
t
t
e
e
tthhee lloocckk’’ss mmaakkee,, rreeff eerreennccee aanndd ccoommbbiinnaattiioonn nnuummbbeerr oonn tthhee lloocckkiinngg llaayyoouutt..This last solution is advised; iitt iiss cchheeaapp aanndd,, iinn tthhee lloonngg--tteerrmm,, aalllloowwssssuupppplliieerrss ooff tthhee uuppssttrreeaamm aanndd ddoowwnnssttrreeaamm eeqquuiippmmeenntt ttoo ccoommpplleemmeenntt tthheeiirrlloocckkiinngg ssyysstteemm..
A
A
n
n
e
e
x
x
a
a
m
m
p
p
l
l
e
e
o
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f
f
“
“
l
l
o
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c
c
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k
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p
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c
c
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f
f
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t
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o
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n
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f
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r
r
m
m
”
”
m
m
a
a
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b
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u
u
p
p
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r
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e
e
q
q
u
u
e
e
s
s
t
t
.
.
Before closing the earthing switch, ensure that the voltagedisplay lights are off and that cables are de-energised.
Medium voltage locking systems
page 7
da t e
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AAPPPPEENNDDIIXX 22
EEXXAAMMPPLLEESS OOFF LLOOCCKKIINNGG
SSYYSSTTEEMMSS
AACC CC EE SS SS TT OO AANN MM VV / / MM VV TT RR AANN SS FF OO RR MM EE RR RR OO OO MM
Medium voltage locking systems
page 8
da t e
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11 kV cubicle 9 5.5 kV cubicle 13
ST13A
S1 D9
TR13
S9
S9
S1 D9
ST13A
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➊ Trip, withdraw aanndd lloocckk cciirrccuuiitt-- ➋ Trip and withdrawbbrreeaakkeerr iinn tthhee ““wwiitthhddrraawwnn”” ppoossiittiioonn cciirrccuuiitt--bbrreeaakkeerr
KKeeyy S1D9 may be removed
➌ Unlock earthing switch
u
u
s
s
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g
k
k
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y
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S
S
1
1
D
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9
9
K
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e
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y
y S1D9 is captive
➎ Unlock earthing switch ➍ Close and lock earthing switch
u
u
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s
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n
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3
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K
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y
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K
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e
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y
y ST13A may be removed
➏ Close and lock earthing switchiinn tthhee ““cclloosseedd”” ppoossiittiioonn
KKeeyy S9 may be removed
➐ Unlock door of transformer roomuussiinngg kkeeyy SS99
K
K
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E
E
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7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 34/41
AAPPPPEENNDDIIXX 22
EEXXAAMMPPLLEESS OOFF LLOOCCKKIINNGG
SSYYSSTTEEMMSS
(
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c
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Medium voltage locking systems
page 9
da t e
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AACC CC EE SS SS TT OO AANN MM VV / / LL VV TT RR AANN FF OO RR MM EE RR RR OO OO MM
5.5 kV cubicle No.16 380 V - LV
BT7
S16
S16
BT7
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➊ Trip and withdrawcciirrccuuiitt--bbrreeaakkeerr
➌ Trip and withdraw ➋ Lock circuit-breakercontactor in the “withdrawn” position
K
K
e
e
y
y BT7 may be removed
➍ Unlock earthing switch
u
u
s
s
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g
g
k
k
e
e
y
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B
B
T
T
7
7
K
K
e
e
y
y BT7 is captive
➎ Close and lock earthing switchin the “closed” positionKKeeyy S16 may be removed
➏ Unlock transformer room dooruussiinngg kkeeyy S16KKeeyy S16 is captive
E
E
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7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 35/41
AAPPPPEENNDDIIXX 22 CC OO NN VV EE NN TT II OO NN AALL FF UU NN CC TT II OO NN AALL LL OO CC KK II NN GG SS YY SS TT EE MM SS
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 11
E
E
A
A
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G
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- 12
H
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-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 12
S
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-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 13
through a circuit-breaker-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 13
through a disconnector-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 13
TT rr aa nn ss ff oo rr mm ee rr ii nn cc oo mm ee rr / / ff ee ee dd ee rr -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 14
MV/MV
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- 14
M
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- 15
C
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r
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 15
F
F U
U N
N C
C T
T I
I O
O N
N A
AL
L
I
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N T
T E
E R
R L
L O
O C
C K
K I
I N
N G
G
II nn cc oo mm ee rr ss ww hh ii cc hh mm uu ss tt nn oo tt oo p p ee rr aa tt ee ii nn p p aa rr aa ll ll ee ll -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 16
Two incomers on same busbar (1/2)-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 16
Two incomers and one coupling (2/3)
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- 16
Medium voltage locking systems
page 10
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7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 36/41
AAPPPPEENNDDIIXX 22
CCOONNVVEENNTTIIOONNAALL
FFUUNNCCTTIIOONNAALL LLOOCCKKIINNGG
SSYYSSTTEEMMSS
Medium voltage locking systems
page 11
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Circuit-breaker withdrawn Circuit-breaker plugged in
Earthing switch Earthing switchcan be closed cannot be closed
Earthing switch open Earthing switch closed
Circuit-breaker Circuit-breakercan be plugged in cannot be plugged in
Functional locking
7/18/2019 Medium Voltage Locking Systems
http://slidepdf.com/reader/full/medium-voltage-locking-systems 37/41
AAPPPPEENNDDIIXX 22
TTYYPPIICCAALL IINNTTEERRLLOOCCKKIINNGG
SSYYSSTTEEMMSS
EE AARR TT HH II NN GG II NN TT EE RR LL OO CC KK II NN GG
GG ee nn ee rr aa tt oo rr ii nn cc oo mm ee rr
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Medium voltage locking systems
page 12
da t e
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-B • 5 •
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10 kV
Excitation
cabinet
Excitation
interlocking
10 kV
B
B
A
A
G
A
A
G
110 kV
110 kV
10 kV
10 kV
HV
MV
A
A
Ø
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R
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m
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o
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v
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b
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l
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k
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AAPPPPEENNDDIIXX 22
TTYYPPIICCAALL IINNTTEERRLLOOCCKKIINNGG
SSYYSSTTEEMMSS
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Medium voltage locking systems
page 13
da t e
0 5 / 9 7
-B • 5 •
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r e v i s e d
0 5 / 9 7
SS ww ii tt cc hh bb oo aa rr dd ii nn cc oo mm ee rr / / ff ee ee dd ee rr
through a disconnectorthrough a circuit-breaker
10 kV
B
A
B
B
10 kV
A
B
10 kV
A
B
10 kV
A
10 kV
B
A
B
10 kV
A
Without earthing switch With earthing switch
Ø
Ø
R
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m
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v
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k
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AAPPPPEENNDDIIXX 22
TTYYPPIICCAALL IINNTTEERRLLOOCCKKIINNGG
SSYYSSTTEEMMSS
(
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Medium voltage locking systems
page 14
da t e
0 5 / 9 7
-B • 5 •
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r e v i s e d
0 5 / 9 7
TT rr aa nn ss ff oo rr mm ee rr ii nn cc oo mm ee rr / / ff ee ee dd ee rr
MV/LVMV/MV
10 kV
B
B
0.4 kV
10 kV
B
A
B
CC
D
6 kV
A
10 kV
6 kV
MV
MV
CD
10 kV
B
B
C
0.4 kV
10 kV
0.4 kV
MV
LV
10 kV
0.4 kV
MV
LV
C
C
With MV/LV transformer With plug-in busbars
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AAPPPPEENNDDIIXX 22
TTYYPPIICCAALL IINNTTEERRLLOOCCKKIINNGG
SSYYSSTTEEMMSS
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Medium voltage locking systems
page 15
da t e
0 5 / 9 7
-B • 5 •
1 -
r e v i s e d
0 5 / 9 7
MM oo tt oo rr ff ee ee dd ee rr
C
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a
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A
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Ø
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AAPPPPEENNDDIIXX 22
TTYYPPIICCAALL IINNTTEERRLLOOCCKKIINNGG
SSYYSSTTEEMMSS
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FF UU NN CC TT II OO NN AALL II NN TT EE RR LL OO CC KK II NN GG
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Two incomers on same busbar (1/2)
Medium voltage locking systems
ate
AA
10 kV
AA A
10 kV
Two incomers and one coupling (2/3)Ø
Ø
R
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m
m
o
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v
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ØØ RReemmoovvaabbllee kkeeyyO Key missing
• Captive key
