ge b90 presentation
TRANSCRIPT
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B90 Bus Differential Relay and Breaker Failure Protection
Cost-efficient
Good performance
Modern communications capability
Member of the Universal Relay (UR) family Easy integration with other URs
Common configuration tool for all !" #E$s
%roven algorithms (&") and hardware (UR)
E'pandable
wo levels of scalability (modules and #E$s)
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NEW!
Busbar Protection Schemes
igh-impedance * linear couplers
non-configurable busbars
cheap relay+ e'pensive primary e,uipment
locing schemes for simple busbars
.nalog low * medium - impedance schemes
$igital relays for small busbars
$igital relays for large busbars %hase-segregated cost-efficient digital relays
for large busbars
B90
B30
BUS
PVD
Any
SPD
GE offer Approach
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Why Digital Bus Relay?
Re-configurable busbars re,uire dynamic assignmentof currents to multiple /ones
e'pensive and dangerous when done e'ternally onsecondary currents (analog way)
natural and safe when done 0in software1
reaer 2ail for re-configurable busbars is naturallyintegrated with the bus protection
3o need for special Cs (cost)
Rela'ed re,uirements for the Cs (cost)
.dvantages of digital technology
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Design hallenges for Digital Busbar Relays
Reliability 4ecurity5
#mmunity to C saturation
#mmunity to wrong input information
6arge number of inputs and outputs re,uired5
.C inputs (tens or hundreds)
rip rated output contacts (tens or hundreds)
7ther output contacts (tens)
$igital #nputs (hundreds)
6arge processing power re,uired to handle al the data
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!raditionally !"o Distincti#e $rchitectures are %ffered
2its better new installations
%erceived less reliable
4lower
5 2
D A U
5 2
D A U
5 2
D A U
C U
c o p p e r
f i b e r
Distributed Bus Protection
5 2 5 2 5 2
C U
c o p p e r
entrali&ed Bus Protection
2its better retrofit installations
%erceived more reliable
%otentially faster
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iA" #A
'e" $rchitecture ( Digital Phase)Segregated Busbar Scheme
2oundation5
4ingle-phase #E$s for primary
differential protection
4eparate #E$s for reaer
2ailure and e'tra #*7s
#nter-#E$ communications for
sharing digital states
4calability and fle'ibility
Phase A
ProtectionTRIPA
iB" #
B
Phase B
ProtectionTRIP
B
i$" #$Phase C
ProtectionTRIPC
Breaerai"#re
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B90 a*acity
Up to 89 circuits in a single /one without voltage
supervision
Multi-#E$ architecture with each #E$ built on modular
hardware Up to 89 .C inputs per !" #E$ freely selectable
between currents and voltages (89:"+ 8&:;+ 88:8+
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B90 Features and Benefits
Ma'imum number of circuits in one /one5 89 3umber of /ones 5 9
usbar configuration5 3o limits
4ub-cycle tripping time
4ecurity (only 8msec of clean waveforms re,uired for stability)
$ifferential algorithm supervised by C saturation detection anddirectional principle
$ynamic bus replica+ logic and signal processing
3o need for interposing Cs (ratio matching up to &85;)
C trouble per each /one of protection
reaer failure per circuit
End fault protection (E2%) per circuit
Undervoltage supervision per each voltage input
7vercurrent protection (#7C and 7C) per circuit
Communication+ metering and recording
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B90 $**lications
usbars5
4ingle
reaer-and-a-half
$ouble riple
?ith and without transfer bus
3etwors5
4olidly grounded 6ightly grounded (via resistor)
Ungrounded
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B90 $rchitecture %#er#ie"
%hase-segregated multi-#E$ system built on Universal
Relay (UR) platform
Each #E$ can be configured to include up to si'
modules5 .C inputs (up to & ' 89 single phase inputs)
Contact outputs (up to = ' >)
$igital #nputs (up to = @ ;=)
Aariety of combinations of digital inputs and outputcontacts
2ast digital communications between the #E$s for
sharing digital states
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B90 $rchitecture
B90
Phase A Protection
P$
UR %&
C
PU
C'
(($
D
$P
I
)'
D
$P
I
)'
D
$P
I
)'
phase A c#rrents * +o"ta,es
fiber-rin,confi,#ration
phase A trip contacts
P$
C
PU
UR %2 Phase B Protection
D
$P
I)'
D
$P
I)'
D
$P
I)'
C'
(($
phase B c#rrents * +o"ta,es
phase B trip contacts
P
$
CP
U
UR %. Phase C Protection
D$
P
I)'
D$
P
I)
'
D$P
I)
'
C'(($
phase C c#rrents * +o"ta,es
phase C trip contacts
P$
C
PU
UR %/ B#s Rep"ica * Breaer !ai"
I)'
I)'
I)'
I)'
I)'
I)'
C'
(($
3o .*C data traffic 3o need for sampling
synchroni/ation+straightforward relayconfiguration - all .*C signals0local1 to a chassis
$ata traffic reduced to #*7s
$irect #*7s (similar to e'istingUR Remote #*7s) used fore'change of binary data
7scillography capabilitiesmultiplied (available in each#E$ separately)
%rogrammable logic(2le'6ogic) capabilitiesmultiplied
47E capabilities multiplied
E'tra URs in a loop for more#*7s
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B90 om*onents+ Protection I,Ds
Modular architecture (from 8 to ! modules) .ll modules but C%U and %4 optional
Up to 89 .C inputs total (89 currents and no
voltages+ through ;8 currents and ;8
voltages)
hree #*7 modules for trip contacts or e'tra
digital inputs 2eatures oriented towards .C signal
processing (differential+ #7C+ 7C+ UA+ 2
current supervision)
Po
'erS(pply
$PU
DSP1
I)*
DSP2
I)*
DSP3
I)*
$o++s
0AC
sin,"e1phaseinp#ts
0AC
sin,"e1ph
aseinp#ts
0AC
sin,"e1ph
aseinp#ts
'therUR1bas
eIEDs
B90 is built on -R hard"are ./ years of field e*erience1B90 is built on -R hard"are ./ years of field e*erience1
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B90 om*onents+ 2ogic I,Ds
Modular architecture (from 8 to ! modules) .ll modules but C%U and %4 optional
Up to != digital inputs or
9> output contacts or
Airtually any mi' of the above
2eatures oriented towards logic functions (2
logic and timers+ isolator monitoring andalarming)
Po
'erS(pply
$PU
'therUR1bas
eIEDs
I)*I)*
I)*I)*
I)*I)*
$o++s
B90 is built on -R hard"are ./ years of field e*erience1B90 is built on -R hard"are ./ years of field e*erience1
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B90 Scheme for 2arge Busbars
D#a" 3re#nant4 fiber 5ith
.6sec e"i+er7 ti6e bet5eennei,hbo#rin, IEDs8 Up to 0
B9:s)URs in the rin,
Phase AAC si,na"s an
trip contacts
Phase BAC si,na"s an
trip contacts
Phase $AC si,na"s an
trip contacts
Di,ital Inp(tsfor iso"ator
6onitorin, an B
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Security of the B90 ommunications
$ual (redundant) ring B each message send
simultaneously in both directions
3o switching e,uipment (direct @-R@ connection)
4elf-monitoring incorporated #nformation re-sent (repeated) automatically
&8-bit CRC
$efault states of e'changed flags upon loss of
communications (allows developing secureapplications)
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B90 ommunications
he communications feature ($irect #*7s) re,uires
digital communications card (dual-port >8"nmm 6E$)
Up to != inputs * outputs could be sent * received
Up to > UR #E$s could be interfaced ?hen interfacing with other URs+ &8 inputs * outputs
are available
he $irect #*7 feature is modeled on UC. G774E but
is sent over dedicated fiber (not 6.3) and is optimi/edfor speed
User-friendly configuration mechanism is available
4imple applications do not re,uire communications
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1%
!y*ical B90 $**lications for 2arge Busbars
; to 2/ feeers
Basic- &% . B/
for less than 1!
feeers
Etene- B/ for +ore
than 1! feeers
/(ll #ersion- 24 /eeers
'ith B/
& 2 . 2. 2/
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!y*ical B90 $**lications for 2arge Busbars
; to 2/ feeers
; to 2/ feeers
&
2
.
/
2&
22
2.
2/
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B90 and Small Single Busbars ( 3)circuit busbar
!"o le#els of scalability allo" fleible a**lications!"o le#els of scalability allo" fleible a**lications
Po'erS(
pply
$PU
DSP1
I)*
DSP2
I)*
DSP3
I)*
Spare
0phase1Ac#rrents
0phase1B
c#rrents
0phase1C
c#rrents
Diff
=,eo6etrica" a+era,e>
=sca"e s#6 of>
=s#6 of>nR iiiii ++++= ...321
( )nR iiiini ++++= ...
1
321
( )nR iiiiMaxi ,...,,, 321=
nnR iiiii = ...321
;arious Definitions of the Restraining Signal
I d t i l S t
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Restraining urrent
he amount of restraint provided by various definitions
is different sometimes significantly different particularly
for multi-circuit differential elements such as busbar
protection
?hen selecting the slope (slopes) one must tae into
account the applied definition of the restraining signal
he !" uses the 0ma'imum of1 definition of the
restraining current
I d t i l S t
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Differential Function ( haracteristic
2
if
f
e
r
e
n
t
ia
"
r e s t r a i n i n ,
L O W
S L O P E
O P E R A T E
B L O C K
IR
| ID|
H I G H
S L O P E
L
O
W
B
P
N
T
H
IGH
B
P
N
T
P I C K U P
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Differential Function ( $da*ti#e $**roach
2
if
f
e
re
n
t
ia
"
r e s t r a i n i n ,
6 e , i o n 1
3 " o 5 2 i f f e r e n t i a "
c # r r e n t s 4
6 e , i o n 2
3 h i , h 2 i f f e r e n t i a "
c # r r e n t s 4
"o5 c#rrents
sat#ration possib"e #e to c offset
sat#ration +er7 iffic#"t to etect
6ore sec#rit7 re@#ire
"ar,e c#rrents @#ic sat#ration possib"e #e to
"ar,e 6a,nit#e
sat#ration easier to etect
sec#rit7 re@#ire on"7 if sat#ration
etecte
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$da*ti#e 2ogic
DI/1
DI6
SA
DI/2
*6
A7D
*
66IP
A7D
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3%
$da*ti#e $**roach
2
if
f
e
re
n
t
ia
"
r e s t r a i n i n ,
6 e , i o n 1
3 " o 5 2 i f f e r e n t i a "
c # r r e n t s 4
6 e , i o n 2
3 h i , h 2 i f f e r e n t i a "
c # r r e n t s 4
D7na6ic 21o#t1of12-
&1o#t1of12 operatin,
6oe
21o#t1of12operatin,
6oe
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3&
Directional Princi*le
DI/1
DI6
SA
DI/2
*6
A7D
*
66IP
A7D
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Directional Princi*le
Aoltage signal is not re,uired
#nternal faults5
all fault (0large1) currents appro'imately in phase
E'ternal faults5
one current appro'imately out of phase
$econar7 c#rrent of
the fa#"te circ#it
3eep CT sat#ration4
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Directional Princi*le
#mplementation5 step ;5select fault 0contributors1
. 0contributor1is a circuit carrying significant amount of current
. circuit is a contributor if its current is above higher breapoint
. circuit is a contributor if its current is above a certain portionof the restraining current
step 85chec angle between each contributor and the sum of allthe other currents
4um of all the other currents is the inverted contributor if thefault is e'ternal on e'ternal faults one obtains an angle of ;>"degrees
step &5compare the ma'imum angle to the threshold
. threshold is a factory constant of !" degrees
.n angle shift of more than !" degrees due to C saturation isphysically impossible
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,ternal Fault
B 8 * $ 9
* P E 6 A 4 E
B 8 * $ 9
pD
p
II
Ireal
pD
p
II
Iimag
Ip
ID
- Ip
E t e r n a l / a ( l t $ o n 0 i t i o n s
* P E 6 A 4 E
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Internal Fault
B 8 * $ 9
B 8 * $ 9
pD
p
II
Ireal
pD
p
II
Iimag
Ip
ID
- Ip
I n t e r n a l / a ( l t $ o n 0 i t i o n s
* P E 6 A 4 E
* P E 6 A 4 E
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Saturation Detector
DI/1
DI6
SA
DI/2
*6
A7D
*
66IP
A7D
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2
iffe
r
e
n
ti
a
"
r e s t r a i n i n ,
Saturation Detector
t0
t1
t2
t0 fa(lt inception
t1 $ starts to sat(rate
t2 eternal fa(lt (nerhea#y $ sat(ration
conitions
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Saturation Detector ( !he State >achine
NORMAL
SAT := 0
EXTERNAL
FAULT
SAT := 1
EXTERNAL
FAULT & CT
SATURATION
SAT := 1
The differeni!"
#h!r!#eri$i#enered
The differeni!"%
re$r!inin r!'e#(r)
(* (f he differeni!"#h!r!#eri$i# f(r
#er!in +eri(d (f i,e
$!*r!i(n
#(ndii(n
The differeni!"
#*rren -e"(. he
fir$ $"(+e f(r
#er!in +eri(d (f
i,e
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Saturation Detector
7peration5
he 4. flag ?#66 37 be set during internal faults
whether or not any Cs saturate
he 4. flag ?#66 be 4E during e'ternal faultswhether or not any Cs saturate
y design the 4. flag is 37 used to bloc the
relay but to switch to 8-out-of-8 operating principle
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4%
,am*les ( ,ternal Fault
0.06 0.07 0.08 0.09 0.1 0.11 0.12-200
-150
-100
-50
0
50
100
150
B& 6s
The b#s 2ifferentia"
protection e"e6ent
pics #p 2#e to hea+7
CT sat#ration
The CT sat#ration f"a,
is set safe"7 before the
pic#p f"a,
Despite hea+7 CT
sat#ration the
eterna" fa#"t c#rrent
is seen in theopposite 2irection
The
2irectiona" f"a,
is not set
The e"e6ent
2oes not
6a"operate
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4&
,am*les ( Internal Fault
The b#s 2ifferentia"
protection e"e6ent
pics #pThe sat#ration
f"a, is not set 1 no
2irectiona"
2ecision re@#ire2
The e"e6ent
operates in
&:6s
A"" the fa#"t c#rrents
are seen in one
2irection
The
2irectiona"
f"a, is set
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-ser)>odified !ri**ing 2ogic
.ll the ey logic flags ($#2ferential+ 4.uration+ $#Rectional) are
available as 2le'6ogicMoperands with the following meanings5
U4 #.4E$ %% - differential characteristic entered
U4 4. - saturation (e'ternal fault) detected U4 $#R - directionality confirmed (internal
fault)
2le'6ogicMcan be used to override the default >F logic
E'ample5 8-out-of-8 operating principle with e'tra security applied
to the differential principle5
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0
Dynamic Bus Re*lica
$ynamic bus replica mechanism is provided by associating astatus signal with each current of a given differential /one
Each current can be inverted prior to configuring into a /one (tie-breaer with a single C)
he status signal is a 2le'6ogicMoperand (totally user
programmable) he status signals are formed in 2le'6ogicMB including any
filtering or e'tra security checs B from the positions of switchesand*or breaers as re,uired
us replica applications5
#solators ie-reaers
reaers
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Dynamic Bus Re*lica ) Isolators
Reliable 0#solator Closed1 signal is composed
he #solator %osition signal5
$ecides whether the associated current is to be included intodifferential calculations
$ecides whether the associated breaer is to be tripped 2or ma'imum safety5
oth normally open and normally closed contacts are used
#solator alarm is established under discrepancy conditions
#solator position to be sorted out under non-valid combinations
of the au'iliary contacts (open-open+ closed-closed) 4witching operations in the substation shall be inhibited until
the bus image is recogni/ed with ;""D accuracy
7ptionally the >F may be inhibited from the isolator alarm
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Dynamic Bus Re*lica ) Isolators
Isolator *penA(iliary
$ontact
Isolator $loseA(iliary
$ontact
IsolatorPosition
Alar+ Bloc S'itchin,
*ff *n $8*SED 7o 7o
*ff *ff 8AS VA8ID After ti+e elay
(ntil
acno'le,e
Until Isolator
Position is #ali
*n *n $8*SED
*n *ff *PE7 7o 7o
I$'AT'R & 'PEN
I$'AT'R & C'$ED
I$'AT'R & B'C
I$'AT'R & AAR(
I$'AT'R & RE$ET
I$'AT'R & P'$ITI'N
Iso"ator position +a"i
3iso"ator opene4
Iso"ator position +a"i
3iso"ator opene4
Iso"ator position in+a"i
a"ar6 ti6e
e"a7
b"ocin, si,na" resets 5hen
iso"ator position +a"i
a"ar6
acno5"e,e
a"ar6 acno5"e,in,
si,na"
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Dynamic Bus Re*lica ( Isolator Positions and Differential Protection
Phase AAC si,na"s 5ire
here- b#s rep"ica confi,#re
here
Phase BAC si,na"s 5ire
here- b#s rep"ica confi,#re
here
Phase $AC si,na"s 5ire
here- b#s rep"ica confi,#re
here
Up to 9 a##"iar7 s5itches
5ire hereF Iso"ator (onitorin,
f#nction confi,#re here
Iso"at
orPo
sition
Iso"atorPosition
Iso"atorPosition
Iso"ato
rPosi
tion
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Dynamic Bus Re*lica ( !ie)Breakers+ !"o)! onfiguration
7verlapping /ones B no blind spots
oth /ones trip the ie-reaer
3o special treatment of the re,uired in terms of itsstatus for $ynamic us Replica (treat as regularbreaer B see ne't section)
TB
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Dynamic Bus Re*lica ( !ie)Breakers !ie)Breakers+ Single)! onfiguration
oth /ones trip the ie-reaer lind spot between the and the C
2ault between and C is e'ternal to 8
;5 no special treatment of the re,uired (treat as regularC)
85 special treatment of the status re,uired5
he C must be e'cluded from calculations after the is opened
8 gets e'tended (opened entirely) onto the
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!
!ie)Breakers+ Single)! onfiguration
4e,uence of events5
; trips and the gets opened
.fter a time delay the current from the C shall beremoved from 8 calculations
.s a result 8 gets e'tended up to the opened
he 2ault becomes internal for 8
8 trips finally clearing the fault
epan
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Dynamic Bus Re*lica ( Breakers+ Bus)side !s
lind spot e'ists between the C and C
C is going to be tripped by line protection
.fter the C gets opened+ the current shall be removed fromdifferential calculations (e'panding the differential /one up to the
opened C)
Relay configuration re,uired5 identical as for the 4ingle-C ie-
reaer
CT
CB
B"in spot forb#s protection
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Dynamic Bus Re*lica (Breakers+ 2ine)side !s
07ver-trip1 spot between the C and C when the C is opened
?hen the C gets opened+ the current shall be removed from
differential calculations (contracting the differential /one up to theopened C)
Relay configuration re,uired5 identical as for a 4ingle-C ie-reaer+
butH1
.ll !" #E$s provide for programmable logic
$istributed logic over fiber-optic communications
($irect #*7s)
2unctions available5 Gates
Edge detectors
6atches and non-volatile latches
imers
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Disturbance Recording
.ll .C inputs automatically recorded
%rogrammable sampling rate5 >+ ;=+ &8+ =9 s*c
%rogrammable content (phasor magnitudes and angles+
differential+ restraint currents+ fre,uency+ any digital flag)
%rogrammable number of records vs< record length 2le'ible treatment of old records (overwrite+ preserve)
%rogrammable trigger
%rogrammable pre-*post-trigger windows
#ndividual (independent) oscillography configuration of each !"
#E$
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!%
Se@uence of ,#ents Recording
Up to ;"9" events per each !" #E$
Events stamped with ;microsecond resolution
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S(:station one;line an
'irin, ia,ra+s
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B90 Summary
Cost-efficient
Good performance
Modern communications capability
Member of the Universal Relay (UR) family
Easy integration with other URs
Common configuration tool for all !" #E$s
%roven algorithms (&") and hardware (UR)
E'pandable
wo levels of scalability (modules and #E$s)
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%0
%rdering the B90
he !" can be ordered as an engineered product
he following order code applies to the engineered !"
B90 @ @ @ @ @@ @ @ @@
B90 Base syste+
S Sin,le :(s:ar
D Do(:le :(s:ar
Do(:le :(s:ar 'ith transfer
Special arran,e+ent
$ $a:inet s(pply
/ /ra+e s(pply
A 6S4& 6S4& C?oB(s 6U" D7P
$ 6S4& 10Base/ C??S)U$A2" ?oB(s $P)IP" D7P
D 6S4& re(nant 10Base/ C??S)U$A2" ?oB(s" $P)IP" D7P
> 12)20" A$)D$
8 24;4&V CD$ only
@@ Specify the n(+:er of lines :(s co(plers Ct'o i,its
0 =itho(t Breaer /ail
B =ith Breaer /ail
0 =itho(t En /a(lt Protection
E =ith En /a(lt Protection
00 Se(ential n(+:er
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Ao" to %rder
#nternational5 6 90C 79/ 8777
Europe5 4/ 9/ /3C 33 00
Email5 info*mindsysgecom