GE SBC223 User manual

GE K-I 00636C
INSTRUCTIONS
STATIC BREAKER
BACK-UP RELAY
TYPE
SBC RELAY
GE Power
Management
205 Great Valley Parkway
Malvern, PA
193351337r
USA
SBC223

GE
K-i
00636
Contents
Page
PRODUCT
DESCRIPTION
3
APPLICATION
4
OPERATION
5
CALIBRATION
9
TIMER
SETTINGS
9
RANGES
9
HARDWARE
DESCRIPTION
10
CONSTRUCTION
10
RECEIVING,
HANDLING AND
STORAGE
10
INSTALLATION
PROCEDURE
10
Surge
Ground
10
ACCEPTANCE
TESTS
11
GENERAL
ii
TESTEQUIPMENT
11
DRAWINGS
11
EQUIPMENTGROUNDING
11
GENERAL
RELAY
TESTS
11
Ti
-POWER
UP
11
T2-ITTEST
12
T3
- SHUTDOWN
TEST
12
T4
-
IT,BFT1, and
BFT2
TEST
12
T5
- BFT
LOGIC
TESTS
(SBC223B
AND
SBC223C
ONLY)
13
T6
-
BET
DELAY, B/0 TIMER
(SBC223C
ONLY)
13
Ti-
IT
LOGIC
TESTS
(SBC223B
AND
SBC223C
ONLY) 13
T8-TARGETTEST
13
PERIODIC
TESTS
14
GENERAL
14
TEST
EQUIPMENT
14
DRAWINGS
14
EQUIPMENT
GROUNDING
14
GENERAL
RELAY
TESTS
14
Ti
-POWER
UP
14
T2-ITTEST
15
T3
-
SHUTDOWN
TEST
15
T4-
IT,BFT1,
and
BFT2
TEST
15
T5
-
BET
LOGIC
TESTS
(SBC223B
AND
SBC223C
ONLY) 15
T6
- BFT
DELAY, B/0
TIMER
(SBC223C
ONLY) 15
T7
- IT
LOGIC
TESTS
(SBC223B
AND
SBC223C
ONLY)
16
T8-TARGETTEST
16
SERVICING
16
SPARES
16
RENEWAL
PARTS
17
SPECIFICATIONS
18
RATINGS
18
BURDENS
19
CONTACT
DATA
19
OVERCURRENT
UNITS
19
TIMERS
19
ACCURACY
19
CASE
19
DIMENSIONS
19
WEIGHT
19
Cover
Photo
8919529

GEK-1
00636
PRODUCT DESCRIPTION
The
SBC223
relays
are
static
breaker-failure
relays
designed
to provide
system
backup
protection
in
the
event
of
a
circuit-breaker
failure.
The
SBC223A
relay
replaces
the
SBZ23A,
the
SBC223B
replaces
the SBC23B,
and the
SBC223C
replaces
the
SBC23C.
The
relays
are
intended
for use
in
three-pole
tripping
schemes,
and
meet
the
requirements
of
a
breaker-failure
backup
scheme
-
high
security
and capability
for
fast
clearing
times.
These
relays
are
applicable
with
any
of
the several
bus/breaker
arrangements
in
general
use,
and
over
a
wide
range
of
fault-current
conditions
that
may
be
encountered.
One
type-SBC
relay
is
required
for
each
breaker.
The
SBC223
relays
contain
the
following
basic
components
and
features:
1.
Input
provisions
for
contact
initiation
that
activates
the
power
supply.
2.
A
level
detector
with
independently
adjustable
pickup
settings
for
phase
(Ia,
Ib, Ic)
and
for
ground
(310),
with
a
reset
time
of
approximately
3
milliseconds.
3.
Adjustable timer(s)
to
provide
time for
the primary
breaker
to
operate
correctly.
4.
Three
electrically
separate
contact output
circuits (BFT)
for
tripping
the
circuit
breakers,
with
two
of the
contacts
having
electromechanical
series
targets.
5.
An
electrically
separate
instantaneous
IT function
for
independent
tripping
of the
breaker
and
for
seal-in of
the
initiating
contacts.
6.
A
regulated
power-supply.
7.
Surge
suppression
on all
AC and DC
input
circuits.
The
SBC223B
is
similar
to
the
SBC223A relay
except
for a
contact
convertor
(CC)
input
and
some
additional
logic.
The
SBC223C
is
similar
to
the SBC223B
except
for
a
second
timer
and
some
additional
1oic.
The
differences
between
the
relays
are
evidenced
in the
External
Connections
and
Logic
Diagrams
of
the SBC223A
and
SBC223B
and
SBC223C,
as
shown
in
Figures
1,
2
and
3
respectively.
Under
normal
conditions,
the
SBC
relays
do
not
have
DC
applied.
Thus,
the
SBC
is
normally
immune
to any
response
to
environmental
electrical
transients.
DC
is
applied
only
when
a
fault
occurs
on a
line
associated
with
the
breaker
being
protected.
The
power
supply
in
these
relays
is
so
designed
that
the
DC
voltage
must
exceed
60% of
the
nominal
voltage
rating
in
order
for
the
relay
to
operate.
This
feature
prevents
false
trips
from
capacitance
discharge
or
from
the voltage-divider
effect
of
the ground-fault
lamps
on
the
DC
bus
in
the
event
that
the
DC
input terminal
of the
SBC
is
accidentally
grounded.
These
instructions
do
not
purport
to
cover
all
details
or
variations
in
equipment
nor provide
for
eveiy
possible
contingency
to
he
met
in
connection
with
installation,
operation
or
maintenance. Should
further
information
be
desired
or should
particular
problems
arise
which
are not
covered
sufficiently
for
the
purcIzaser
purposes,
the
matter
should
be
referred
to
the
General
Electric
Company.
To
the
extent
required
the
products
described
herein meet
applicable
ANS1
IEEE and
NEMA
standards;
but
no such
assurance
is
given
with
respect
to
local
codes
and
ordinances because
they
vary
greatly.
-3-

GEK-100636
APPLICATION
The
most
convenient method of
detecting
that
a breaker
has failed to
operate
is to
allow
time
for
it
to operate properly.
If
the
breaker has been
unable
to
clear
a
fault
at the end
of
a
preset
time,
the
output
of
the breaker failure relay
would
initiate
tripping of
the backup breakers.
The
basic
components of
a
breaker failure
scheme are shown
in
Figure
4. The heart
of
the
scheme
is
the
timer. The timer
is started
by a breaker failure
initiating
circuit, identified
by
BFI.
The
BFI
circuit
is
associated
with
the
breaker trip
bus and it provides
an
output
whenever the protective
relays
attempt
to
trip the breaker.
The timer is
stopped
by
the
resetting
of the
level
detector or
by
the resetting
of the BFI circuit.
The function
of the
level
detector
is
to
indicate the
position of the
circuit breaker.
If the breaker
operates successfully,
the level detector
would
reset
and stop the
timer. If the
breaker fails
to
operate,
the
level
detector
would keep
the
timer
energized,
and after
a
preset
time
delay,
the
timer would
operate
the breaker failure trip
outputs
(BFT). The BFT
outputs
initiate the tripping
of the backup breakers.
The routing of
these outputs
depends
upon
the bus and
breaker arrangement
and
will
be
discussed
subsequently.
The level
detector
is considered to be
the most reliable means
of determining
the position of
the
breaker.
When the
breaker
opens,
the level
detector resets, since
the current
in
the breaker
drops
to zero,
or
in some breakers, to
a value determined
by
inserted resistors.
The
pickup
setting of
the
level
detector
should
he
selected so
that the level
detector operates
for all faults for
which the
breaker is
to be tripped.
However,
for some
equipment
faults such as
turn-to-turn
faults on
transformers,
the magnitude of fault
current
may not be
sufficient
to operate
the
level
detector.
In
this
case the
breaker
auxiliary switches (52/a)
can
be
used to indicate the
breaker position. It
should
he recognized
that the
position
of the breaker auxiliary
switch
is not a completely
reliable
indication of breaker
position,
since
it indicates the position
of the
breaker
mechanism, and not
necessarily the
state of
the breakers
main contacts.
The general method
used
to
determine
the setting
of the breaker-failure
timer involves
a
coordination
of various time
delays
as shown
in the time
coordination chart
in
Figure
5.
The
breaker-failure
total clearing
time is
the time
between
the inception of
the
fault and
its removal
by
the
backup
breakers;
and
it
must he less than the
maximum
allowable fault clearing
time
that
is
required
to
insure system
stability and
to coordinate with
remote backup relays.
Obviously, the
setting
of the breaker-failure
timer
must be long
enough
to
allow for normal clearing
of the fault.
The timer setting
should also include time
delay
(with
ample margin)
for the
level
detector
to
drop
out.
The margin
factor
provides
security to the
scheme
by
accounting for such
variables as
breaker-interrupting
time
in excess
of rated
time, variations in the
BFI
pickup
times,
overtravel
of
the timer,
and
possible
variations in timer
operation from
such causes
as
temperature
change or
voltage
variations.
*
The
basic
relay contains the
following components
and features.
1.
Input provisions
for a
contact
initiation that activates
the relay
power supply.
This
adds
to
the
security
of
the
scheme since the
breaker-failure
relay is disconnected
from
all DC
until the
associated
protective
relays
attempt to trip
the breaker. In general
the contact
initiation is
from the
BFI,
62X
and/or
62Y
contacts.
The
BFI
contacts
would
come
from static
line
relays, while the
62X
and 62Y contacts
would
come
from
electro-mechanical
line relays.
These contacts
will close whenever
the associated
line
relays produce
a
trip
signal
to trip the breaker.
2.
A level detector
(LD)
with
two independently
adjustable pickup
settings for phase
(IA,
IB, IC) and
ground
(310) currents. The
level
detector has a fast
dropout
time of
approximately
3
milliseconds
when
the input current
is
suddenly
reduced
to 90 percent
of pickup, or
less.
(See
Figure 11.)
*
The output
relays
on the
SBC
have
a
pickup
time of 6-10 ms.
and
a dropout
time of
3-5 ms.
-4-

GEK-1
00636
3.
A
breaker-failure
timer
(A/U)
to
provide
time
for the
associated
breaker
to
operate
correctly.
The
timer
is
accurate
with
negligible
overtravel
and
its
pickup
time
is
adjustable
from
10 to
1650
milliseconds
in
10
millisecond
steps.
4.
Three
electrically
separate
contact
outputs
for
tripping
the
backup
breakers.
Two
of
the
outputs
have
electro-mechanical
series
targets.
5.
An
independent
IT
function.
One
of
the
output
contacts
can
be
used
to
apply
a
separate, independent
trip
signal
to
the
breaker
with which
the
SBC
is
associated.
Under
usual
operating
conditions
of
the
SBC,
the
associated
breaker
would
already
have
received
a
trip
signal
from
the
protective
relaying.
The
separate
trip
signal
from
the IT function
provides
an
alternate
chance
to
trip
the
breaker
correctly
in
the
event
of
some
failure
in
the
protective
relay
tripping
circuits.
Unnecessary
tripping
of
the
backup
breakers
can
therefore
he
avoided.
Another
output
of
the
IT
function
can be
used
to
seal-in
the initiating
contacts
as
described
subsequently.
There
are
three
breaker-failure
relays
available
and
they
are
identified
as
Type
SBC223A,
SBC223B
or
SBC223C.
OPERATION
A
simplified functional
logic
diagram
for
the
SBC223A
relay
is
shown
in
Figure
1.
If
a
fault
occurs,
the
contact initiation
activates
the
relay
power
supply.
Once
the
power
supply
is
activated,
the
level
detector
(LD)
produces
an
output
that
energizes
the
A/U
timer.
If
the timer
is
energized
longer
than its
setting,
it
indicates
that
the
breaker
has
failed
to
clear
the
fault.
An
output
from
the
timer
operates
the
BFT
outputs.
If the
breaker
had
cleared
the
fault
then
either
the
contact
initiation
(BFI,
62X,
62Y) or
the
level
detector
would
have
dropped
out
before
the
timer
could
have
timed
out,
and
no
backup
tripping
would
take place.
The
SBC223B
and
SBC223C relays
contain
all the
components
and
features
of
the
SBC223A relay
plus
some
combination
of
the
optional
features noted
below:
1,
Contact converter
input
to
supervise
the
breaker-failure
timer.
The
function
of the
contact
converter
is
to
convert
a
contact
operation
into a
signal
that
is
compatible
with
the
logic
circuit of the
Type
SBC
relay.
2.
A
second
timer
that,
in
conjunction
with
the
other
timer,
allows
different
time
settings
depending
on
the
input
conditions.
The
SBC223B
relay
(Figure
2)
contains
all
the
components
of
the
basic scheme
plus
a
contact
converter
(CC).
By
closing
an
external contact
DC
is
supplied
to
the
contact converter.
The
signal
from
the
contact converter
supervises
the
A/O
timer
in one
of
two
ways,
the
choice
depending
on
the
position
of
the
link
that precedes
the
timer.
If
the
link is
placed
in
the AND
position,
the A/U
timer
is
controlled
by
an
output
from
the level
detector
AND
an output
from
the
contact
converter
via
the
AND1
logic
function.
The timer
will reset
if
either
the
level
detector
or
the
contact
converter
resets. If
the
link
is
placed
in
the
OR position,
the
A/U
timer
is
controlled
by
an
output
from
the
level
detector
OR an
output
from
the
contact converter.
For
this case
the
A/U
timer
will
reset
only
if
both
the
level
detector
and
the
contact
converter
reset.
It
is
obvious
that
the
resetting
of the
initiating contact
(BFI
or
62X)
will
also
cause the
timer
to
reset.
The
AND
mode
can
be used
by
those
who
desire
short
backup tripping
times
only
for severe
conditions
where
stability
may
be
a
problem,
such
as
three-phase
faults
with a
high
magnitude
of
fault
current.
The
worst
case
occurs
when
all
three
poles
of
the
breaker
fail to
interrupt
the
circuit.
This can
only
happen
if
the
breaker
mechanism
fails
to
operate.
Since
breaker
auxiliary
switch
52/a
indicates
the
position
of
the
breaker
mechanism,
it
can be
used
to
energize
the
contact
converter.
For
added
security,
the level
detector
can
be
set
high
to
limit its
reach
to
fault locations
where
instability
may
occur.
Hence,
the
A/U
timer
will stay
energized
only
for
faults
that
produce
-5-.

GEK-100636
sufficient
current
to
activate
the
level
detector
and
where
the
breaker
mechanism
fails
to
operate
as
indicated
by the
position
of
breaker
auxiliary
switch
52/a.
If
the
breaker
mechanism operates,
breaker
auxiliary
switch
52/a
would
open
and reset
the
A/U
timer.
It
should
be recognized
that
the
breaker
can
fail
to
interrupt
the
circuit
even
if
the
breaker
mechanism
operates.
1-lowever,
for
this
case,
it
is
highly
probable
that
only
one of
the breaker
poles
has failed
to
interrupt
the
circuit.
Since
it
is
very likely
that
the
continuing
fault
is
a
single-phase-to-ground
fault,
longer
tripping
times
can
he
allowed.
An SBC223A relay
can
be used
as
a
second
breaker-failure
relay
with
a
longer
tripping
time and
a
more
sensitive
level-detector
setting.
The
function
of
this
second
relay
is
to
detect
the remaining
less
severe
faults
for
which
the
breaker
fails
to
interrupt
the circuit.
An
example
of
the
use
of the
OR
mode
is
shown
in
Figure
10,
where
backup
protection
is
provided
for
breaker
1,
which
must
operate
for
transformer
faults
as well as
for
faults
on line
A.
The
currents
associated
with
breaker
I
energize
the
level
detector,
which
in
turn
starts
breaker-failure timer
A/U.
Since the
magnitude
of
fault
current
for
some
transformer
faults
may
not
be sufficient
to
pick up
the
level
detector,
the
contact
converter
input
is
provided
as
another
means
of
starting
the
timer.
The contact
converter
produces
an
output that
starts
breaker-failure
timer
A/0 whenever
the
transformer
differential
auxiliary
relay
(87)
operates.
If
the
breaker
operates
successfully, the
breaker
auxiliary
switch
52/a
would
open
and
reset
the
A/0
timer.
It
should
be
recognized
that
such
a
scheme
is
not completely
reliable,
since the
52/a
contact
is
not
a
positive
indication
of
the
condition
or
position
of
the main
poles
of
the
associated
circuit
breaker.
Depending
upon
the
position
of
the
link
that precedes
ANDI,
the IT
function
will
be
energized
from
either
the level
detector
or
from
the
contact converter.
The
SBC223C relay
(Figure
3)
contains
two
timers
(A/U
and
B/U)
and
a
contact
converter. The
purpose
of
having
two
timers
is
to
provide
for
two
different
tripping
times
depending
on
the
input
conditions.
In
effect, the
SBC223C
relay
is
a
combination
of
the
SBC223A
and
SBC223B relays
with
one
level
detector.
The
A/U timer
is
energized
by
an
output
from the
level
detector.
The
B/U
timer
is
energized
by an
output
from
the
ANDI
logic
function.
With
the
link
in
the
LD
position,
the
AND1
logic
function
is
in
service and
will
produce
an
output
whenever
there
is
an
output
from
the
leveL
detector
and
the
contact
converter.
This
arrangement
can
be
used
with
breaker
auxiliary
switch
52/a
to
provide
a
short tripping
time
via
the B/U
timer
if
the breaker
mechanism
fails
to operate.
The
level
detector
should
be
set sensitive
enough
to
detect
all
faults
for
which
the
breaker
is
tripped.
If
the
breaker
mechanism
operates
but the
breaker
fails
to
interrupt
the
circuit,
longer
tripping
times
can
be
tolerated
via
the
A/U
timer
since
it
is
highly
probable
that
the continuing
fault
is
the result of the
failure
of
only
one pole
of
the breaker,
and
hence
is
a
single-phase-to-ground
fault.
For
this
case
there
would
be
no
output
from
the
B/U
timer
because
the
auxiliary
switch
would
open
and
de-energize
the contact
converter.
However,
the level
detector
would
keep
the
A/U
timer
energized;
and
after
its
time
delay the
A/U
timer
would
operate
the BR
contacts
to
initiate tripping
of
the
backup
breakers.
With the
link
in
the
CC position,
the AND1
logic
function
will
produce
an
output
whenever
the
contact
converter
produces
an
output.
This
arrangement
provides
two different
tripping
paths
to
energize the
BFT
contacts.
One
path
is
via
the
level
detector
and
the
A/0
timer. The
other
path
is
via
the
contact
converter
and the
B/U timer.
The
use of
this arrangement
is
found
in
applications
where
a
second
means
is
required,
other
than
the level
detector,
to
detect
a
breaker-failure
condition.
In
multi-breaker
arrangements
as
shown
in
Figure
lU,
the
fault
currents
on
the
two
circuits
adjacent
to
breaker
1
may
differ greatly
in
magnitude.
The
level
detector
can
be
set
high
to
operate
for
faults
on
line
A
and
high
current
faults
in
the
transformer;
and
the
associated
timer
A/0
can
be
set
for
a
short
tripping
time.
The
contact
converter
can
be
energized
by
the
transformer-differential
auxiliary
relay
(87x)
to
initiate
breaker
backup
protection
for
those
transformer
faults
that
do
not
produce
sufficient
current
to operate
the
level
detector.
Since
the magnitude
of fault
current
is
not
sufficient
to operate
the level
detector,
this
is
not
a
severe
fault,
and
somewhat
longer
tripping
times
can
be
tolerated
via
the
B/U
timer.
Depending upon
the
position
of
the
link
that
precedes
the IT
function,
the
IT
unit will
be
energized
either
from
the
level
detector,
or
from
the contact
converter.
-6-

GEK-1
00636
NOTE:
The
pickup
level
of
the
IT
unit
could be
different
from
the
pickup
level of
the
BFT
unit.
If
the
IT unit
is
not
supervised
by
a
timer,
its
pickup
level
will be
equivalent
to
the
following
equation:
At
60
I-Iz
IT
pickup
=
.535
x
BFT
Pickup
At
50
Hz
iT
pickup
=
.453
x
BFT Pickup
The
seal-in
contact provided
by
the
IT
function
is
for
those
who wish
to
use
such
a
feature.
The
seal-in circuit
has
a
slight
time
delay
to
provide
additional
security
against
seal-in
operations
resulting
from
such
causes
as
surges
or
transients. The
purpose
of
the
seal-in
circuit
is
to
ride
over
contact
bounce
in
the
initiating
contacts
(if
such
bounce
exists)
and to
maintain
the
DC input
of
the
SBC
in
the event
of
a
zero-voltage
fault that
results
in
resetting
of
the
initiating
protective
relays
before
the
breaker-failure
timer
can
produce
an
output.
The
seal-in
circuit should
be
used
with
caution,
since
it
can
reduce
the security
of
the scheme
during testing
if
the
level
detector
is
set
to
pick up
below
load
current.
Note that
most
static
line-relaying systems
include
a
seal-in
function
SO
that
the
BFI
contacts
remain
closed
until
the fault
is
cleared.
For the
SBC223A,B,
or
C,
to
implement
the
Seal-In
feature
with the
IT
contact
at
Stud
II,
the
JI
connector, located
in
the upper-left-hand
corner
of
the
backplane
(see
Figure
16),
must
have
a
jumper
connecting terminals
I
and
2.
This
will
no
longer
leave the
IT
contact
isolated.
To
implement
the Seal-In
function
with Stud 9,
the
JI
connector
must have
a
jumper
connecting
terminals
2
and
3.
This
will
flO
longer
leave Stud
9
and
the
IT
contact
isolated. Both methods
of
Seal-In
can
be
seen
in
the
External Connection
and
Logic
Diagrams
for
each
relay.
To
eliminate
all
Seal-In function, place
the
jumper
on
JI
connected
to
only one
terminal
(Do
Not
short
together
any
two
terminals).
This
is
the
configuration
with
which
the
original
SBC23
was
shipped.
The routing
of
the
contact-initiation
inputs
and
the
BFT outputs
depend
upon
the
bus and
breaker
arrangement.
The static
breaker-failure
relaying
schemes
described
in
this
book
are
intended
for
application
on
a
per-breaker
basis.
That is,
there is
one
breaker-failure
relay
associated
with
each
breaker
in
a
bus array.
On
this
basis
the
current
inputs
to
a
breaker-failure
relay
must
come
from
CT’s
that
measure
the
current
in
the
associated
breaker.
The
trip
outputs
must be
routed
to
initiate
the
tripping (or
transferred
tripping)
of
all
backup
breakers
necessary
to
clear the
fault.
The
listing
in
Table
I
covers
the
bus
arrangements that
are
in
common
use
today.
They are
the
single-bus-single-breaker, double-bus-double-breaker,
breaker-and-a-half,
and ring-bus
arrangements,
and
they
are
shown
in
Figures
6, 7,
8
and
9
respectively.
Each
listing
in
Table
I
indicates
the
assumed
fault location,
the
breaker
which
is
assumed
to
have failed,
the
contact
initiation
that
activates
the
relay,
and
which
breakers
or
lockout
relays
should
be
tripped
by
the
BFT
contacts.
For
example,
in
a
single-bus-single-breaker
arrangement
(Figure
6),
if
breaker
#2
is
to
he
protected,
the
level
detector
(LD)
receives
the
currents
associated
with
breaker #2.
The
contact
initiation
is
from
the
protective
relays
of
line
B.
If
breaker
#2
fails for
a
fault at
Fl, the
breaker-failure
relay
operates
and the BFT
contact
#1
trips
the
bus
lockout
relay.
For
another
example,
consider
the
ring bus
arrangement
that
is
shown
in
Figure
9.
If
breaker
1
is
to
he
protected,
the
level
detector
receives
the
currents
associated
with
breaker
1.
The
contact
initiation
is
from the
protective
relays
of
line
A
for
a
fault at
Fl
or
the
protective
relays
of
line
B
for
a
fault at
F2.
Assuming
breaker
I
fails
for
a
fault at
Fl,
the
relay
operates
and the
BFT
contacts
trip
the
following:
BFT
#1
trips
breaker
2
and
BFT #2
trips
breaker
6;
BFT #3
trips
the
lockout
relay
that
transfer
trips
breakers
7
and
8
and
blocks
reclosing
of
2
and
6.
-7-

GEK-1
00636
TABLE
I
BUS
AND
CURRENT CONTACT
BFT
BFT
BFT
BREAKER
FIG.# FAULT FAILED
FROM
INITIATION
CONTACT
CONTACT CONTACT
ARRANGEMENT
LOC.
BREAKER
ASSOC.
FROM
#1
TRIPS
#2
TRIPS
#3
TRIPS
BREAKER
Single
Bus- Bus
5
Fl
22
LineS
Single
Bkr.
Lockout
--
Relay
North
Lockout
relay
Double
Bus- Fl
Line
B
Bus
that
transfer
Double
Bkr.
6 or
33
or
Lockout
Srkr.4
trips
line
B
&
F2
North
Bus Relay
blocks
reclosing
of
Srkr4
South
Lockout relay
Double
Bus-
Fl
Line
B
Bus
that
transfer
Double
Bkr.
6
or
4
4
or
Lockout
Brkr.3
trips
line
B
&
F3
South
Bus Relay
blocks
reclosing
of
Brkr.3
North
Lockout
relay
Breaker-&-
Fl
Line
A
Bus
that transfer
a-Half
7
or 4
4
or
Lockout
Brkr.5
trips
Bkr.l0
&
F3
North
Bus
Relay
blocks
reclosing
of
Brkr.5
Lockout
relay
Breaker-&-
Fl
Line
A
that
transfer
a-Half
7 or
55
or Brlcr.4 Brlcr.6
trips
Skis.
10
&
F2
Line
B
11
&
blocks
re
closing
of
4
&
6
South
Lockout
relay
Breaker-&-
F2 Line
B
Bus
that
transfer
a-Half
7
or
66
or
Lockout
Brkr.5
trips
Brkr.11
F4
South Bus
Relay
&
blocks
re
closing
of
5
Lockout
relay
Fl
Line
A
that transfer
Ring
Bus
B
or
1
1
or
Brkr.2
Brkr.6
trips
Bkrs.7
&
F2
Line
B
8
&
blocks
re
closing
of
2
&
6
Reset
Time
With
all
SBC223
units,
the
level-detector output
will
reset
in
approximately
3
ms.
after
the
fault
current
falls
below
the level-detector
setting,
as
shown
in
Figure
11.
When
the
SBC223
is
used
in
a
breaker-failure
application
(the DC
Power
Supply
is
suddenly
energized),
the
level-detector
operating
time is
as
shown
in
Figure
12.
-8-

GEK-1
00636
Power
Supply
The
power
supply
for
all
SBC223
models
operates
on
a
range
of
36 to
280
VDC
input.
It
includes
a
circuit
to
shut
down
the
relay
output
if
the
incoming
DC
is
less
than
60%
of
the
rated
DC
voltage.
The
rated
DC
voltage
is
switch-selectable
by
moving
the
lever
located
on
the
nameplate
at
the front
of
the
relay.
CALIBRA’iION
Level
Detector
All SBC
relays
are tested
using
automatic
test
equipment.
There
is
no
need
for
any
calibration
when
the
relay
is
received.
However,
if
the
analog
board
is
replaced,
the
user
does have
the
ability
to
calibrate
the
level-detector
pickup.
This
is
done
by
adjusting
all
timers
to
their
minimum
setting,
powering the
relay,
and
inputting an
rrns
value
of
current
equal
to
that
of
the pickup
setting of
the phase
or
ground
unit.
If
the
BFT
LED
is
not
on, adjust
potentiometer
R25
(Phase
unit)
or R24
(Ground
unit),
located
on
the
front
of
the
analog
board,
by
turning
the
screw
in
the
counter-clockwise
direction
until
the
BFT
LED
is
on
continuously.
If
the
BFT
LED
comes
on
as
soon
as
the
current
is
applied,
turn the
screw
in
the
clockwise
direction
until
the
BFT’
LED
goes out,
then
turn
the
screw
in
the
counter-clockwise
direction
until
the
LED
is
on
continuously.
Timer
The timers
for
the SBC
are
calibrated
at
the
factory and
should
not
need
any
adjustment.
Reset
Timer
The
reset
timer
for
the
SBC
is
a
permanent
value
built
into
the
hardware
of
the
relay.
If
there
is
a
need
to
change the
reset
time,
consult
the
factory for
details.
TIMER
SETTiNGS
The
delay
through the
timer
circuits
can
be
calculated
as
follows:
If
the
switches
for an
individual
timer
are
set
to
the
“OFF”
position,
the
relay
will
provide
lOms.
of
delay
for
any
continuous
signal
(no
reset).
If
any
switch
for
an
individual
timer
is
set
to
the
‘ON”
position,
the
relay
will
provide
a
delay
equal
to
the
sum
of
all
the
switches
for
that
timer.
NOTE:
If
a
timer
is
set
to
zero time
delay,
a
delay
of
lOrns
will
be
incurred.
This
is
the
same
delay
that
would
be
obtained
if
the
lOms.
switch
on
a
timer
is
set
to
the
“ON”
position.
To
obtain
a
delay
longer
than
lOms.,
additional
switches
would
need
to
be
set
to
‘ON”.
RANGES
SBC223
1
Amp Version
5
Amp
Version
Phase
Current
0.2A
-
1.7A
in
0.1A
steps
1.OA
-
8.5A
in
0.5A
steps
Ground
Current
0.IA
-
0.85A
in
0.05A
steps
0.5A
-
4.25A
in 0.25A
steps
A/0
and
B/0
Timers*
10
-
1650
milliseconds
10-1650
milliseconds
(in
10-millisecond
steps)
(in 10
millisecond
steps)
*There
is
no
B/0
timer
in
the
SBC223A or
SBC223B.
-9-

GEK-100636
HARDWARE
DESCRIPTION
CONSTRUCTION
The
components
of the
relay
are
mounted
on
a
cradle
assembly
that
can easily
be
removed
from
the relay
case,
refer
to
Figures
14 through 17.
The cradle
is locked
in the case
by
latches
at
the
top and
bottom.
The
electrical
connections
between
the
case
blocks
and
the
cradle
blocks
are
completed
through
removable connection
plugs,
as
shown
in
Figure
18,
to
permit
testing the
relay
in its
case.
The
cover
is attached
to
the front
of
the
case
and includes
two
interlocking
arms
that
prevent
the
cover
from
being
replaced
until
the connection
plugs
have
been
inserted.
The
case
is suitable
for
semi-flush mounting
on
panels.
Hardware
is
available
for
all
panel
thicknesses up
to two
inches.
A panel
thickness of 1/8
inch
will
be assumed
unless otherwise
specified
on
the
order.
The
printed-circuit boards
are
mounted behind
the
nameplate and
can
be accessed
by
removing
the
four
screws
securing
the
nameplate.
The boards
are
mounted
horizontally
in
guides.
Use
GE
part
number
286A2847P1 card
puller
or
other
suitable
means
to
remove
the circuit
boards. If
you
do
not
have
a
card puller,
be
careful not
to
damage
or bend
any
components
when
removing the
boards.
RECEIVING, HANDLING
AND
STORAGE
This
relay
contains
electronic
components
that
could
be
damaged
by
electrostatic
discharge
currents
if those
currents
flow
through
certain
terminals of
the
components.
The
main
source of
electrostatic
discharge
currents
is
the human
body,
and the
conditions
of low
humidity,
carpeted
floors
and
isolating
shoes
are
conducive
to
the
generation
of electrostatic
discharge currents.
Where
these conditions
exist,
care
should
be exercised
when
removing and
handling
the
modules.
The
persons
handling
the
module
should
make
sure
that
their
body
charge
has
been
discharged,
by
touching
some
surface
at
ground
potential,
before
touching
any
of
the
components
on
the
modules.
These
relays,
when
not
included
as
part
of
a control
panel,
will
be
shipped
in
cartons
designed
to
protect
them against
damage. Immediately
upon
receipt
of
a
relay,
examine
it for
any
damage
sustained
in
transit.
If
damage
resulting
from
handling
is
evident,
file a
damage
claim
at
once
with
the
transportation
company
and
promptly
notify the
nearest General
Electric
Sales Office.
If
the relays
are
not to
be
installed
immediately,
they
should
be
stored
in
their
original
cartons,
and
in a
place
that
is free
from
moisture,
dust
and
metallic
chips.
INSTALLATION
PROCEDURE
The
relay
should be
installed
in a
clean,
dry
location,
free from
dust and
excessive
vibration.
It
should
be mounted
on
a
vertical
surface. The
outline
and
panel-drilling
dimensions
are shown
in
Figure
19.
Surge
Ground
The
case
stud should
be
permanently
connected
to
ground
by a
conductor
not less
than
AWG
No.
12
copper
wire
or equivalent.
This
connection
is
made
to
ground
the
relay
case
and
the
surge-
suppression
networks
in the
relay. The
surge-ground
lead
should
be
as short
as possible,
preferably
10
inches
or less,
to
provide
maximum
protection
from
surges.
Figure
16
shows
the
rear
view
of
an M2
case,
illustrating
the
position
of the
case-grounding
stud.
-10-

GEK-1 00636
ACCEPTANCE
TESTS
CAUTION
Power
Down the
relay
by
removing the test
plugs before removing or
inserting
modules.
Failure to do
so
can permanently
damage
the
relay.
GENERAL
This section is a guide
for testing
the relay.
It is not
necessary
that the
tests be performed
for
incoming inspection.
The relay has
been tested at
the factory with
automated
test
equipment.
TEST
EQUIPMENT
1.
Single source
of
current
at
the rated frequency.
2. AC ammeter.
3.
Continuity
tester or Ohm
meter.
4. Precision timer
for
testing timed
events.
5.
One
VDC
supply.
The
specific requirements
of
the
equipment are
given in the text of this
section, and
in
the
associated
circuit diagrams.
DRAWINGS
The following
drawings should
he used
for
reference
during
testing.
They are
located in the
PRODUCT DESCRIPTION
(PD)
section.
1. The External Connections Diagram
SBC223A
FIG
I
2.
The
External Connections Diagram
SBC223B
FIG
2
3.
The External Connections
Diagram
SBC223C
FIG 3
EQUIPMENT
GROUNDING
All equipment
used in testing the
SBC223
relay should be
connected
to
a common
grounding
point to
provide
noise immunity. This
includes
the
current
source,
as
well
as the
SBC221
itself.
The
ground
connection on the SBC223
is terminal
#10.
GENERAL
RELAY
TESTS
Ti
- POWER
UP
1.
Connect the relay
as
shown in
Figure
20.
The AC
input is
not
required for this
test;
only
the DC
power
supply voltage is
required.
Apply the
rated
DC.
2. Only
the
Green,
ENERGIZED,
LED should be
on.
Note:
To perform the Acceptance
Test
correctly,
eliminate
all
seal-in
function
by
placing
jumper Ji connected
to only
one
terminal (i.e. do
not
short together any
terminals).
See
Figure
16 for the
location 0 fJl.
-11-

GEK-100636
T2 - IT TEST
1.
Connect
the relay
as
shown
in Figure 21.
Set
the IT logic
switch
to
the LD
position.
2.
Set the phase
pickup
to
1 amp for
Gi
and
G3 relays
and
.2 amp
for
G2
relays.
Set
GND current
pickup to .5 amp
for Gi and
G3
relays and .1 amp
for G2
relays.
3.
Conduct
the test
according
to
the
steps in
Table II.
Groups
1
and 3
are
5
amp
units
and group
2 is
a
I amp
unit.
TABLE
II
Current
Gi
G2
G3
Current
Studs
IT Contact
Phase/IT
Light
.5A
.08A .43A
1,2
open
off
.5A
.08A
.43A
3,4
open
off
.5A
.08A .43A
5,6
open
off
.57A
.IA .48A
1,2
closed
on
.57A
.1A .48A
3,4
closed
on
.57A .1A .48A
5,6
closed
on
.25A .04A
.21A
7,8
open
off
.30A
.05A
.24A
7,8
closed
on
T3
- SHUTDOWN TEST
1. Connect the relay
as
shown
in
Figure 21. Set
the IT logic switch
to
the
LD position.
2. Conduct
the test
according
to
the last
line of
Table
II.
3. While
the input
current is still
being applied,
decrease the input
DC to
60%
of the
rated
DC
vohage.
4.
The
only
relay
lights
that
should remain on are
the DC Voltage Low
light and the
Energized
light. All contacts
should
go
to
their
un-energized
state.
T4 - IT,BF]i,
and BFT2 TEST
Pickup
Delay:
1.
Connect
the
relay
as shown in
Figure 22.
Set the
A/0
timer
to
0
time
delay.
Set
each relay according
to
TABLE III.
TABLE
III
Relay IT
Logic
BFT
Logic
SBC223A
A/0
SBC223B
B1T
Logic
OR
SBC223C LD
2.
Set
phase pickup to
I
A.
3.
Input
5 A to
studs
1,2
and record the time
to close contacts
11,12
13,14
15,16
or
19,20. When the
contacts
are closed,
notice that lights IT,BFT1, and
BFT2
are on.
4.
Remove
5
A
source
from studs 1,2.
5. Set
A/0
timer to 20 ms.
-12-

GEK-100636
6.
Repeat
step
3 and
notice
a
10
ms.
increase
(+2ms.)
in
the
time needed
to
close contacts
13,14
15,16
or
19,20
(the SBC223A
should
also
have
a
delay
on
studs
11,12).
Remove
all
AC
and
DC
inputs
to
the
relay.
7.
Repeat
steps
1
through
6
but
use
1000
ms.(±5Oms.)
in
step
5 and
step
6.
Dropout
Delay:
8.
Set
all
timers
to
0
time
delay.
Input 5
A
to
studs
1,2.
After
relay
has
tripped, remove
AC
input
and
check
to
see
that
studs
11,12
13,14
15,16
and
19,20 all
open
in
less
than
10
ms.
Seal
in
function
must
be
disabled: JI
must
be
connected
to
one
terminal.
T5
- BFT
LOGIC
TESTS
(SBC223B
AND
SBC223C
ONLY)
1.
Connect
the
relay
as
shown in
Figure
22.
Set
AJ0
timer
on
the
SBC223C
to
1
000ms. and
set
all
other
timers to
0 ms.
2.
Set
the
BFT
Logic
switch to AND
for
the
SBC223B
and
LD
for
the
SBC223C.
Set
the
phase pickup
to
I
amp.
3.
Input 2
amps into
studs
I
and
2
and
close
the
switch
to
stud
9.
Notice that
the BFT
lights
come
on
and
contacts
13,14
15,16 and
19,20
close
without
any
time
delay.
T6
- BF[
DELAY,
BfO
TIMER
(SBC223C
ONLY)
1.
Connect
the
relay
as
shown
in
Figure
22, Set
the
AJO
and
BlO
timer to
0
ms.
2.
Set
the
BFT
Logic
switch
to
CC.
3.
Close
the switch
to
stud
9
and
record
the time
to close
contacts
13,14 15,16
and
19,20.
4.
Set
B/0 timer to
20
ms.
5
Repeat
step
3
and
notice a
10
ms.increase
(±
2
rns.)
in
the time
needed to
close
contacts
13,14
15,16
and
19,20.
6.
Repeat
steps
4
and
5
but
use
1000 ms.(±50
ms.)
in
steps
4
and
5.
T7
-
IT
LOGIC
TESTS
(S8C223B
AND
SBC223C
ONLY)
1.
Connect
the
relay
as
shown
in
Figure
23.
2.
Set
IT
Logic
switch to
CC.
3.
Close
switch
to stud
9
and
notice the
IT
light and
the
iT
contacts
closing.
4.
Set
the
iT
logic
switch
to
OUT
on
the
SBC223C
and
check
that
the
iT
contacts
open.
T8
-
TARGET
TEST
I.
Connect
the
relay
as
shown
in
Figure
24.
2.
Set
the
phase pickup
to
I
A.
Place +Batt.
on stud
17.
Set
all
timers
to
0 time
delay.
Set
the
relays
according
to
TABLE
HI.
input
2
A
into
studs
1,2.
3.
Input
200
mA
through
contacts
11,
12
and
see
that
the
IT
target
has
tripped.
4.
Input
200
mA
through
contacts
13,14
and see that
the
BFTI target
has
tripped.
5.
input
200
mA
through contacts
19,20
and
see
that
the BFT2
target
has
tripped.
-13-

GEK-1
00636
PERIODIC
TESTS
CAUTION
Power
Down
the relay
by
removing
the
test
plugs
before
removing
or
inserting
modules.
Failure
to
do
so can
permanently
damage
the
relay.
GENERAL
In
view
of the
vital
role
of
protective
relays
in
the operation
of
a
power
system,
it
is
important
that
a periodic
test
program
be
followed.
It
is recognized
that
the
interval
between
periodic
checks
will
vary
depending
upon environment,
type
of relay,
and
the
user’s
experience
with
periodic
testing.
Until the
user
has
accumulated
enough
experience
to
select
the test
interval
best
suited
to
his individual
requirements,
it
is
suggested
that
the
following
points be
checked
at
an
interval
of
from
one
to
two
years.
TEST
EQUIPMENT
1.
Single
source
of current
at the
rated
frequency.
2. AC
ammeter.
3.
Continuity
tester
or Ohm
meter.
4.
Precision
timer
for testing timed
events.
5.
One
VDC
supply.
The
specific
requirements
of
the equipment
are given
in
the text
of
this
section,
and
in
the
associated
circuit
diagrams.
DRAWINGS
The
following
drawings
should
be
used
for
reference
during
testing.
They
are located
in the
PRODUCT
DESCRIPTION
section.
1.
The External
Connections Diagram
SBC223A)
Fig.1
2.
The
External Connections Diagram
SBC223B)
Fig.2
3.
The External
Connections Diagram
SBC223C)
Fig.3
EQUIPMENT
GROUNDING
All
equipment
used
in testing
the
SBC223
relay should be
connected
to
a
common
grounding
point
to
provide
noise
immunity.
This
includes
the
current
source,
as well
as the
SBC221
itself.
The
ground connection
on
the
SBC223
is
terminal #10.
GENERAL
RELAY
TESTS
Ti
-POWER
UP
1.
Move
the
rated
DC
voltage
switch
to
the
input
battery
voltage.
2.
nnect
the
relay
as
shown
in
Figure
20.
The
AC
input
is
not
required
for
this
test;
only
the
DC power
supply
voltage
is
required.
Apply
the
DC.
3.
Only
the
Green,
ENERGIZED,
LED
should
be
on.
NOTE:
To
perform
the Periodic
Test
correctly,
eliminate
all
seal-in
function
by placing
Jumper
JI
connected
to
only
one
terminal
(i.e. do
not short
together
any terminals).
See
Figure
16 for the
location
of
Ji.
-14-

GEK-100636
rj
ITTEST
1.
Connect the
relay
as
shown in Figure 21.
Set
the
IT logic switch to the LD position.
2. Apply the current
5
percent below the Phase pickup value
to
each of the three
current inputs.
Place +Batt.
on
stud
17.
(See NOTE
in
the OPERATION section
to
calculate the
IT
pickup.)
3.
Notice that the IT contacts are open and the Phase
light
remains
off.
4.
Increase the current to 5 percent above
the
Phase pickup value.
Notice that the IT
contacts are closed and the Phase and IT lights are on.
T3 - SHUTDOWN
TEST
1. Connect the relay as shown in Figure 21.
Set
the IT logic switch
to
the LD
position.
2.
Conduct
the
test according to
item 4
of the
IT
test.
3.
While
the input
current is still being applied, decrease the input DC
to 60% of
the
rated DC voltage.
4.
The
only relay lights
that
should remain
on are the DC Voltage Low light
and
the
Energized light. All contacts should go to their un-energized
state.
T4 - IT,BFF1, and
BFT2
TEST
Pickup Delay:
1.
Connect
the relay
as
shown in Figure
22. Set
the relay according
to
TABLE III.
2.
Place
+Batt.
on stud 17.
3.
Input current
5
percent above the Phase pickup value to studs
1,2
and record the
time to
close contacts 11,12 13,14 15,16 or 19,20.
When the contacts are
closed,
notice
that lights IT, BFTI, and BFT2 are on.
4. Notice
that the
time
required
to
close
the
contacts is
equal
to the A/0 time dela
Only the SBC223A has delay on its
IT
contacts. See the
NOTE
under
TIME
SETTINGS to calculate
the
timer delay.)
Dropout
Delay:
5.
Input current 5 percent
above
the Phase
pickup value to
studs
1,2. After the relay
has tripped, remove AC
input
and
check
to
see that studs 11,12 13,14 15,16
and
19,20
all open in less
than
lOms.
T5 - BFT LOGIC TESTS
(SBC223B AND SBC223C ONLY)
1. Connect the relay as shown
in Figure 22.
Set
A/0
timer on
the
SBC223C to l000ms
and set all
other timers
to 0
ms.
2. Set the BFT
Logic
switch
to AND for the SBC223B and
LD
for the SBC223C.
Set
the
phase pickup to 1 amp.
3.
Input 2 amps
into
studs 1
and 2
and close
the switch to stud
9.
Notice that the
BFT
lights come on and contacts
13,14 15,16 and 19,20
close.
T6 - BVf
DELAY, B/O TIMER (SBC223C ONLY)
1. Connect
the
relay as
shown in Figure 22. Set the A/0
and
B/0 timer to 0 ms.
2. Set the BFT
Logic switch
to CC.
3.
Close the
switch to stud 9
and record the time
to
close
contacts 13,14 15,16 and
19,20.
4.
Set
B/0
timer
to 20 ms.
5 Repeat
step 3
and
notice a 10 ms.increase (± 2 ms.) in the time
needed
to
close
contacts
13,14 15,16 and 19,20.
6.
Repeat
steps
4 and
5 but use 1000 ms.(±50 ms.) in steps 4
and 5.
-15-

GEK-1
00636
T7
- IT
LOGIC
TESTS
(SBC223B
AND
SBC223C
ONLY)
1.
Connect
the
relay
as shown
in Figure 23.
2.
Set
IT
Logic
switch
to
CC.
3.
Close
switch
to
stud
9
and
notice
the
IT
light
and
the
IT
contacts
closing.
4.
Set
the
IT
logic
switch
to
OUT
on
the
SBC223C
arid
check
that
the
iT
contacts
open.
T8
- TARGET
TEST
1.
Connect
the
relay
as
shown
in
Figure
24.
2.
Set
the phase
pickup
to
I A.
Place
+Batt.
on
stud
17.
Set
all
timers
to
0 time
delay.
Set
the
relays
according
to
TABLE
III.
Input
2
A
into studs 1,2.
3.
Input
200
mA
through
contacts
11,12
and
see
that
the IT
target
has
tripped.
4.
Input
200
mA
through
contacts
13,14
and see
that
the
BFT1
target
has
tripped.
5. Input
200
mA
through
contacts
19,20
and
see
that
the
BFT2
target
has
tripped.
SERVICING
CAUTION
Power
Down
the
relay
by
removing
the
test
plugs
before
removing
or
inserting
modules.
Failure
to
do
so
can
permanently
damage
the
relay.
SPARES
There
are
two
basic
approaches that
may
be
followed
in servicing
the
SBC
relay.
One
approach
is
field
service,
where
an
attempt is
made
to
replace
defective
components
at
the relay
location.
Generally,
this
will
take
the
most
time
and
require the
highest
degree
of
skill
and
understanding.
It can
also
be
expected
to
result
in
the
longest
system-outage
time.
The
preferred
approach
is
board replacement, where
a
determination
is
made
as
to
which
printed-circuit
board
has
failed
and
that
board
is
replaced with
a spare
board.
The
system
can
then
be
quickly
returned
to
service.
Considerable
time
is
saved
and
there
is
much
less
pressure
to
make
a
decision
about
what
to
do
with
the
defective
part.
This
approach
typically yields
the
shortest
down
time.
It is
recommended
that
a
complete
set
of
spare
printed-circuit boards
be
kept
at
the main
maintenance
center.
For
those
who
wish
to
repair
at
the
component level,
drawings
are
available
from
the
factory.
When
requesting
drawings,
the
following
information
must be
supplied
to
the
factory:
1.
Assembly
number
of the
hoard.
This
is
found
on
the
component
side
of
the
printed-circuit
board.
It
is
an
eight
digit
number
with
a
letter
inserted
between the
fourth
and
fifth
digit
and
suffixed
with a
group
identification,
e.g.
0184B8921G2.
-16-

GEK-1
00636
2.
Revision
number
of
the
board.
This
is
also found
on
the
printed-circuit
board, e.g.
REV.
1.
The acceptance
tests
should he
performed
after
a
printed-circuit
hoard
has
been
repaired
or
replaced.
Whenever
the
nameplate
is
removed
from
the
relay,
care
must be
taken
when
replacing
it
so
that
it
does
not
interfere
with
the
mechanical
operation
of
any
switches
that
protrude
through
the
nameplate.
RENEWAL
PARTS
It
is
recommended that
sufficient
quantities
of
renewal
parts
be
carried
in
stock to
enable
the
prompt
replacement
of
any
that
arc
broken
or
damaged.
When
ordering
renewal
parts,
address
the
nearest
Sales Office
of the
General
Electric
Company.
Specify
the
quantity
required,
the name
of the
part wanted,
the
part number
if
known,
and the
complete
model
number
of
the
relay for
which
the
part
is
required. The
table
below
lists
the
part
numbers
for
the
most
common
replacement
parts.
It
is
recommended
that renewal parts
only be
obtained
from
the
General
Electric
Company.
Should a
printed-circuit
card
become inoperative,
it
is
recommended
that
the
card
be
replaced
with
a
spare.
RENEWAL
PARTS
MODEL
NUMBER
FUNCTION
PART
NUMBER
SBC223AXXA
ANALOG BOARD
0184B8921G002
SBC23BXXA
SBC223CXXA
SBC221AXXA
0184B8921G003
SBC223BXXA
SBC223DXXA
0184B8921G004
SBC231AXXA
SBC221BXXA
TIMER
BOARD
0184B8750G006
SBC223CXXA
SBC223DXXA
SBC231AXXA
SBC22
1AXXA
01
84B
875
0G007
SBC223AXXA
SBC223BXXA
SBC2XXXXXA
POWER
SUPPLY
BOARD
0184B6385G003
SBC221AXXA
LOGIC
BOARD
0188B9752G001
SBC22
1BXXA
0188B9752G002
SBC223AXXA
0188B9752G003
SBC223BXXA
0188B9752G004
SBC223CXXA
0188B9752G005
SBC223DXXA
0188B9752G007
SBC231AXXA
0188B9752G006
-17-

GEK-100636
RENEWAL
PARTS,
continued
MODEL
NUMBER
FUNCTION
PART
NUMBER
SBC22
I AOl
A
BACKPLANE
BOARD
021
5B8410G001
SBC22
I
AO2A
021
5B84
10(3003
SBC22IAO3A
SBC221AO4A
0215B84I0G001
SBC22IBOIA
0215B8410G002
SBC22
IBO2A
021
5B8410G004
SBC22IBO3A
SBC22IBO4A
0215B8410G002
SBC223AOIA
0215B8411G001
SBC223AO2A
021
5B84
1
1G002
SBC223AO3A
SBC223AO4A
0215B841
1GOOI
SBC223BOIA
0215B841
1G003
SBC223BO2A
-
0215B8411G004
SBC223BO3A
SBC223BO4A
0215B841
1G003
SBC223COIA
SBC223CO2A
0215B841
1G004
SBC223CO3A
SBC223CO4A
0215B841
1(3003
SBC223DOIA
0215B841
1G005
SBC23IAOIA
0215B8412G001
SBC23
IAO2A
0215B8412G002
SBC23IAO3A
SBC23IAO4A
0215B8412G001
SBC2XXXXXA
EXTENDER
BOARD
0215B8031G001
CARD
PULLER
207A5404P001
UPPER
CRADLE BLOCK
0184B8624G014
LOWER CRADLE
BLOCK
0184B8624G{)13
UPPER
CASE
BLOCK 006418058(3045
LOWER
CASE
BLOCK
0064
18058(3129
SPECIFICATIONS
RATINGS
Rated Frequency
50
or
60
Hertz
DC Control Voltage
36
-
280
VDC
Input
Circuit
Current
Ratings
Nominal
Current
=
IA
Nominal
Current
5A
Continuous
2A
1OA
One Second
100A
500A
Ambient
Temperature
Range
Operation
—20°C
to
+65°C
Storage
—40°C
to
+85°C
Humidity
95%
without
condensation
-18-

GEK-1
00636
Insulation
lest
Voltage
2kV 50/60
Hz,
one
minute
Impulse
Voltage
Withstand
5kV
peak, 1.2/50
milliseconds, 0.5
joules
Interference
Test
Withstand
SWC,
per
ANSI
C37.90.1
IEC
255
BURDENS
Current
Circuits
Impedance
VA
@
5A
5A
Transactor
.029
ohm,
46.02° at
60
Hz
.026
ohm,
40.9° at
50
Hz
IA
Transactor
.597
ohm,
49.69° at
60
Hz
.541
ohm, 44.98°
at
50
Hz
DC
Battery (power
supply)
20
Watts
Max.
CONTACT
DATA
Trip
Outputs Continuous
Rating
3
Amps
Make
and
carry
30
Amps
(per
ANSI
C37.90)
Target
Operate Level
(Minimum)
150
mAmps
(Maximum)
30
Amps for
1 sec.
OVERCURRENT
UNITS
Range
in
Amps
Resolution
in
Amps
1
Amp Relay
5
Amp Relay
1
Amp
Relay
5
Amp Relay
Phase
.2
-
1.7
1
- 8.5
.1
.5
Ground
.1
-
.85
.5
- 4.25
.05
.25
TIMERS
Range
in
Milliseconds
Resolution
in
Milliseconds
A/0
10-1650
10
B/0*
10-1650
10
*
There is
no
B/0
timer
in SBC
223A
or
SBC223B
ACCURACY
IOC
5%
CASE
M2
DIMENSIONS
See
Outline and
Panel
Drilling
Dimensions, Figure
19
WEIGHT
Maximum
shipping weight
20
pounds
(9.09
kilograms)
-19-

GEK-100636
LIST
OF FIGURES
Cover
Photo:
8919529)
SBC223
1
Figure
1
External Connections
and
Logic
Diagrams
SBC223A
21
Figure
2
External Connections
and
Logic
Diagrams
SBC223B
22
Figure
3
External
Connections
and
Logic
Diagrams
SBC223C
23
Figure
4
Basic
Components
of
Breaker
Failure
Scheme
24
Figure
5
Breaker
Failure
Time
Chart
for the
SBC
Relay
25
Figure
6
Relay
Application,
Single
Bus,
Single
Breaker
26
Figure
7
Relay
Application,
Double
Bus,
Double
Breaker
26
Figure
8
Relay Application,
Breaker-and-a-Half
27
Figure
9
Relay Application,
Ring
Bus
27
Figure
10
Sample
Application
for
SBC223B
28
Figure
11
Level
Detector
Reset
Time
Graph
for the
SBC
Relay
29
Figure
12
Level
Detector
Operating
Time
for the
SBC
Relay
30
Figure
13
Internal
Connections
Diagram
31
Figure
14
SBC
with
Front
Cover
Removed
32
Figure
15
SBC
Front
View
Without
Nameplate
32
Figure
16
Rear
View
of
Relay
Case
and
Cradle
33
Figure
17
Typical
Removed
Module
34
Figure
18
Drawout
Case
Contact
Assembly
34
Figure
19
Outline
and
Panel Drilling
Dimensions
35
Figure
20
Power
Up Test
36
Figure
21
IT
Test
36
Figure
22
BFTI
and
BFT2
Test
37
Figure
23
IT
Logic
Test
37
Figure
24
Target
Test
38
LIST
OF TABLES
TABLE
1
Common
Bus
Arrangements
8
TABLE
II
IT
Test
Steps
12
TABLE
III
IT, BFT1,
&
BFT2
Test
Settings
12
Among the
changes
made
since
the first
edition
are
the
following:
the Figures have
been
moved
to
the
back
of
the
instruction
book;
references
to
the
current
detector
were
changed
to
level
detector;
output
relay
pick
up
and
dropout
times
were added,
IT
and
BFT
pickup
levels
clarified,
and
sections
on
Reset
Time
and
Power
Supply,
Calibration,
Timer
Settings
and
Ranges
were
added; revisions
have
been
made
in
sections
on
the
breaker-failure
timer,
seal-in
function,
acceptance
and
periodic
tests
Ti
and
T3,
Table
II,
and
periodic
test
T4;
backplane
part
numbers
have
been
added
for
SBCE***04A
models;
Timer
Specifications
were added;
Figures
1,
2,
3, and
5
were
revised,
Figures
11
and
12
were
changed,
Figure
13
was
added
and
subsequent
Figure
numbers
(and
text
references
to them)
changed,
and Figure
19
(formerly
18)
was
changed;
the
Surge
Ground
Stud
was
labeled
in
Figure
16.
-20-