GE SLR12A User manual

GEK
-
86653
C
INSTRUCTIONS
RECLOSER
RELAYS
TYPE
SLR
12
A
and
SLR
12
B
GENERAL
ELECTRIC
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GEK
-
86653
CONTENTS
PAGE
INTRODUCTION
4
DESCRIPTION
4
APPLICATION
4
Block
Instantaneous
Tripping
Block
Automatic
Tap
Changer
.
Selective
Reclosing
Synchronism
Check
Delayed
Reset
.
Pause
Function
Special
Input
Capabilities
Setting
Up
the
SLR
12
to
Operate
as
an
SLR
11
5
6
6
7
7
Dual
Use
8
8
8
OPERATION
9
SLR
12
Inputs
and
Outputs
Basic
Operation
Additional
Features
DC
Power
Supply
AC
Power
Supply
Printed
Circuit
Board
Assembly
Settings
Programming
Read
Power
Up
and
Power
Down
Ratings
Burdens
9
10
11
13
13
13
14
15
18
22
24
25
TESTING
25
Recloser
Self
Test
Dielectric
Tests
.
.
Functional
Test
.
.
.
25
27
28
INSTALLATION
31
31
Receiving
,
Handling
and
Storage
Case
Mounting
Connections
Relay
Removal
and
Insertion
.
.
.
.
31
32
32
32
RENEWAL
PARTS
32
CAUTIONS
33
33
WARNING
2
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GEK
-
86653
TABLES
,
TIMING
DIAGRAM
AND
FIGURES
TABLES
Interrupting
Ratings
of
Telephone
-
Type
Relay
Contacts
Interrupting
Ratings
of
Auxiliary
Relay
Contacts
Input
VA
and
Power
Ratings
Hipot
Circuit
Groups
24
I
24
II
25
III
27
IV
22
TIMING
DIAGRAM
FIGURES
Elementary
Diagram
Showing
Typical
External
Connections
to
the
SLR
12
A
Elementary
Diagram
Showing
Typical
External
Connections
to
the
SLR
12
B
Use
of
Contact
to
Block
Instantaneous
Trip
Circuit
Prior
to
First
Reclosure
RI
and
Delayed
Trip
Diagrams
Connections
for
two
Separate
Single
-
Shot
Reclosures
,
Each
With
a
Different
Time
Delay
Connections
for
Synchronism
Check
Function
Delay
Reset
for
Ground
Faults
Pause
Function
Internal
Connections
for
SLR
12
A
Internal
Connections
for
SLR
12
B
DC
Power
Supply
AC
Power
Supply
Nameplate
Relay
and
Power
Supply
Logic
and
Control
r
.
.
.
Functional
Test
Diagrams
SLR
12
A
Relay
,
Side
View
(
Power
Supply
)
SLR
12
B
Relay
,
Side
View
(
Power
Supply
)
SLR
12
Relay
,
Side
View
(
Relay
and
Power
Supply
)
SLR
12
Relay
,
Rear
View
(
Surge
Board
)
Outline
and
Panel
Drilling
Dimensions
for
SLR
Relay
.
.
1
.
34
2
.
35
3
.
36
4
.
37
5
.
38
38
6
.
39
7
.
Dual
Use
39
8
.
40
9
.
41
10
.
42
11
.
43
12
.
44
13
.
45
14
.
46
15
.
47
16
.
48
17
.
49
18
.
50
19
.
51
20
.
52
21
.
(
8043813
)
SLR
12
Relay
(
In
Case
)
Cover
photograph
:
These
instructions
do
not
purport
to
cover
all
details
or
variations
in
equipment
nor
provide
for
every
possible
contingency
to
be
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
purchaser
'
s
purposes
,
the
matter
should
be
referred
to
the
General
Electric
Company
.
To
the
extent
required
the
products
described
herein
meet
applicable
ANSI
,
IEEE
and
NEMA
standards
;
but
no
such
assurance
is
given
with
respect
to
local
codes
and
ordinances
because
they
vary
greatly
.
3
Courtesy of NationalSwitchgear.com

GEK
-
86653
INTRODUCTION
The
SLR
12
A
and
SLR
12
B
relays
can
be
used
to
reclose
a
breaker
up
to
four
times
following
tripping
by
protective
relays
.
These
relays
can
be
set
to
provide
one
instantaneous
(
no
intentional
delay
)
and
three
time
-
delayed
reclosures
.
Any
,
or
all
,
of
the
reclosures
can
be
disabled
.
The
SLR
12
A
relay
is
designed
for
use
with
DC
voltages
(
48
,
110
,
125
,
220
,
250
)
,
whereas
the
SLR
12
B
relay
is
designed
for
use
with
AC
voltages
(
120
/
240
)
.
Typical
external
connections
to
the
SLR
12
A
and
SLR
12
B
relays
are
shown
in
Figures
1
and
2
respectively
.
DESCRIPTION
The
SLR
12
relays
are
microprocessor
-
controlled
and
designed
for
use
in
the
reclosing
of
a
circuit
breaker
following
tripping
by
protective
relays
.
Up
to
four
reclosures
can
be
selected
,
with
one
being
instantaneous
and
the
other
three
being
settable
over
various
time
ranges
.
Additional
features
,
to
be
discussed
subsequently
,
are
also
included
.
A
Liquid
Crystal
Display
(
LCD
)
is
included
in
the
relay
to
display
all
settings
that
are
directly
programmable
from
the
front
of
the
relay
.
Programming
is
done
via
a
set
of
four
CODE
switches
,
a
set
of
4
NUMBER
switches
and
an
ENTER
button
(
see
the
nameplate
,
Figure
13
,
for
details
)
.
The
CODE
switches
(
set
to
1
or
0
)
are
used
to
select
which
setting
is
to
be
made
,
whereas
the
NUMBER
switches
(
set
to
IN
or
OUT
)
are
used
to
make
the
actual
setting
.
After
the
CODE
and
NUMBER
switches
have
been
set
,
the
ENTER
button
is
pushed
to
store
the
setting
in
the
relay
.
Further
details
can
be
found
under
the
Settings
section
.
Settings
can
be
checked
by
pushing
the
READ
button
,
which
will
cause
the
settings
to
be
sequentially
displayed
on
the
LCD
(
see
Read
section
)
.
The
READ
button
can
be
pushed
at
any
time
to
check
the
settings
.
The
recloser
is
also
programmed
to
perform
a
self
-
test
by
pushing
the
TEST
button
,
which
will
cause
the
recloser
to
go
through
its
operating
sequence
without
energizing
the
output
relays
(
see
TESTING
section
)
.
The
READ
and
TEST
buttons
can
be
pushed
at
any
time
without
the
need
for
removing
the
recloser
from
service
:
however
,
the
relay
must
be
enabled
for
the
TEST
button
to
work
.
If
a
reclosing
operation
is
called
for
during
either
the
test
or
read
sequence
,
they
will
be
overridden
and
the
recloser
will
then
run
through
its
normal
operating
sequence
.
APPLICATION
The
SLR
12
relays
can
be
used
to
close
a
circuit
breaker
up
to
four
times
following
tripping
by
protective
relays
.
Any
,
or
all
,
of
the
reclosures
can
be
selected
.
If
all
four
reciosures
are
selected
,
the
first
reclosure
will
always
be
instantaneous
,
4
Courtesy of NationalSwitchgear.com

GEK
-
86653
If
three
,
or
less
,
reclosures
are
followed
by
three
time
-
delayed
reclosures
,
selected
,
all
three
may
be
time
delayed
,
or
one
instantaneous
reclosure
followed
by
one
or
two
delayed
reclosures
may
be
used
.
intentional
time
delay
.
The
reclosure
and
reset
times
are
as
follows
:
The
instantaneous
reclosure
has
no
TIKE
RANGE
SECONDS
RESOLUTION
MULTIPLIER
Instantaneous
Reclosure
No
delay
0.1
to
15.9
First
Timed
Reclosure
0.1
/
Second
Timed
Reclosure
1.0
to
159
1.0
0.5
,
1.0
,
2.0
,
4.0
1.0
to
159
1.0
Third
Timed
Reclosure
1.0
to
159
Reset
Time
1.0
The
time
multiplier
works
on
all
time
ranges
concurrently
:
i
.
e
.
,
it
is
not
possible
to
change
only
one
time
range
.
The
multiplier
has
no
effect
on
the
instantaneous
reclosure
.
Typical
external
connections
to
the
SLR
12
A
and
SLR
12
B
relays
are
shown
in
Figures
1
and
2
respectively
.
These
diagrams
illustrate
the
connections
to
be
used
in
simple
,
straightforward
applications
without
any
special
requirements
such
as
synchronism
check
,
delayed
reset
,
etc
.
These
special
requirements
will
be
discussed
separately
.
A
breaker
control
switch
(
52
CS
)
and
breaker
auxiliary
"
a
"
and
"
b
"
switches
are
required
as
shown
in
the
connections
.
A
control
switch
contact
(
5
-
5
C
)
that
is
closed
only
in
the
"
close
"
and
"
normal
after
close
"
positions
is
employed
to
prevent
automatic
reclosing
of
the
breaker
following
a
manual
trip
.
With
this
switch
arrangement
,
the
relay
will
sense
that
reclosing
is
being
prevented
,
and
it
will
go
to
lockout
when
it
tries
to
close
the
breaker
following
a
manual
trip
.
The
SLR
12
relays
have
many
unique
features
and
a
great
deal
of
flexibility
in
how
they
may
be
employed
.
Following
is
a
description
of
how
these
features
can
be
used
in
some
special
applications
.
Please
refer
to
the
OPERATION
section
for
specific
details
on
each
of
the
functions
used
in
these
applications
.
The
figures
used
in
the
following
descriptions
apply
only
to
the
pertinent
input
connections
.
Refer
to
the
overall
elementaries
,
Figures
1
and
2
,
for
the
remainder
of
the
connections
.
Block
Instantaneous
Tripping
It
is
sometimes
desirable
on
distribution
circuits
to
block
the
instantaneous
trip
circuits
after
the
first
trip
but
before
the
first
reclosure
is
completed
,
thus
providing
for
coordination
with
branch
circuit
fuses
.
This
can
be
implemented
with
the
normally
-
closed
BI
contact
as
shown
in
the
simplified
connection
diagram
of
Figure
3
.
The
diagram
represents
an
application
with
time
overcurrent
(
TOC
)
and
instantaneous
overcurrent
(
IOC
)
functions
.
Note
that
the
BI
contact
opens
at
the
first
selected
reclosure
and
stays
open
during
the
remainder
of
the
reclosing
cycle
,
and
in
the
lockout
position
if
reclosing
proves
to
be
unsuccessful
.
A
contact
of
the
breaker
control
switch
is
shown
,
connected
across
the
BI
contact
.
This
control
switch
contact
,
which
is
closed
in
the
"
close
"
position
of
the
switch
,
is
used
to
re
-
establish
the
instantaneous
trip
circuit
when
the
breaker
is
manually
reclosed
with
the
SLR
relay
in
the
lockout
position
.
5
Courtesy of NationalSwitchgear.com

GEK
-
86653
It
is
also
possible
to
use
the
normally
-
closed
RS
contact
to
block
instantaneous
tripping
.
second
,
delayed
reclosure
and
thus
allow
instantaneous
tripping
to
occur
two
,
or
even
three
,
times
rather
than
just
once
,
as
can
be
done
with
the
BI
contact
,
that
the
RS
function
can
be
set
to
drop
out
at
the
lockout
position
;
thus
,
instantaneous
tripping
is
re
-
instated
at
that
time
and
it
is
not
necessary
to
use
the
control
switch
contact
described
in
the
preceding
paragraph
.
Block
Automatic
Tap
Changer
In
this
case
,
RS
can
be
set
to
pick
up
after
the
first
,
or
even
the
Note
The
normally
-
closed
RS
contact
can
be
used
to
block
the
automatic
tap
changer
circuit
during
the
reclosing
cycle
.
The
RS
contact
would
typically
be
set
to
open
at
the
start
of
the
reclosing
cycle
and
to
close
when
lockout
is
reached
.
Selective
Reclosing
In
some
applications
it
may
be
desirable
to
initiate
instantaneous
plus
delayed
reclosures
following
a
high
-
speed
trip
,
but
to
allow
delayed
reclosures
only
,
following
a
time
-
delayed
trip
.
This
can
be
accomplished
by
applying
a
signal
from
the
time
delay
trip
bus
to
the
DR
input
of
the
SLR
relays
as
shown
in
Figure
4
.
With
this
connection
,
the
recloser
will
skip
the
instantaneous
reclosure
(
or
the
first
selected
reclosure
)
and
go
immediately
to
the
next
selected
reclosure
.
It
is
possible
to
use
the
high
-
speed
reclose
initiate
(
RI
)
output
from
the
protective
relaying
scheme
to
initiate
the
reclose
cycle
,
but
it
must
be
parallelled
by
a
breaker
"
b
"
switch
contact
as
shown
in
Figure
4
to
ensure
completion
of
the
reclose
cycle
.
It
is
also
possible
to
set
the
SLR
relays
to
provide
two
separate
single
-
shot
reclosures
,
with
each
reclosure
having
a
different
time
delay
,
might
be
desirable
to
provide
a
single
-
shot
of
reclosing
with
a
long
time
delay
for
ground
faults
,
but
to
provide
a
single
-
shot
of
faster
reclosing
for
phase
faults
.
This
can
be
accomplished
via
the
connections
shown
in
Figure
5
.
example
,
that
a
single
-
shot
instantaneous
reclosure
is
required
following
phase
faults
,
but
that
a
single
-
shot
time
-
delayed
reclosure
is
required
following
ground
faults
.
To
do
this
,
make
the
connections
shown
in
Figure
5
with
a
contact
from
the
ground
fault
detection
circuit
connected
to
the
DR
input
(
select
single
-
shot
No
.
2
)
of
the
SLR
relay
.
Make
the
following
settings
:
Select
instantaneous
(
INST
)
and
first
(
1
st
)
reclosure
.
For
example
,
it
Assume
,
as
an
1
.
Set
the
first
reclosure
time
delay
to
that
required
for
ground
faults
.
2
.
Set
pause
control
jumper
P
9
to
the
IN
position
3
.
4
.
Set
pause
select
jumper
P
10
in
the
1
to
A
position
Set
pause
time
setting
to
zero
(
0
)
5
.
Set
appropriate
reset
time
.
6
.
6
Courtesy of NationalSwitchgear.com

GEK
-
86653
With
these
connections
and
settings
the
following
will
occur
.
For
phase
faults
-
when
a
phase
fault
occurs
,
there
will
be
no
DR
input
to
the
SLR
relay
.
Consequently
,
when
the breaker
trips
and the
"
b
"
switch closes
,
the
SLR
relay
will
initiate
an
instantaneous
reclose
output
to
close
the
breaker
.
At
the
same
time
,
the
BI
contacts
will
open
to
remove
the
pause
input
.
If
the
reclosure
is
successful
,
the
SLR
will
reset
following
the
reset
time
(
BI
contacts
will
close
at
that time
)
.
If
the
reclosure
is
not
successful
and
the
breaker
retrips
,
the
SLR
will
count
down the
first
reclose time
and
then
try
to
close
the
breaker
.
Reclosing
will
not
be
permitted
,
however
,
because
of
the
open
pause
input
,
and
the
SLR
will
then
immediately
go
to
lockout
.
Thus
,
only
one
reclosure
is
permitted
.
For
ground
faults
-
when
a
ground
fault
occurs
,
there
will
be
an
input
applied
to
the
DR
input
of
the
relay
(
must
be
applied
before
"
b
"
closes
)
.
At
that
time
,
the instantaneous
reclosure
will
be
skipped
and
the
SLR
will
start
to
count
down
to
the
first
reclosure when
the
"
b
"
switch closes
.
The
breaker
will
thus
be
closed
following
a
delay
equal
to
the
first
reclose
time
,
reclosure is
successful
,
the
SLR
will
go
to reset
.
If
the
breaker
retrips
,
the
SLR
will
go
immediately
to
lockout
.
Flere
too
,
only
one
reclosure
is
allowed
.
1
.
2
.
If
the
Synchronism
Check
Synchronism
check
may
be
used
with
the
SLR
reclosers via
the
pause
input
,
as
shown
in
Figure
6
.
In
this
connection
,
the
synchronism
check
contact
must
be
closed when
the
system
is
in
synchronism
and
open
when the
system
is
out
of
synchronism
.
Thus
,
when
a
reclose
is
called
for
it
will
be
permitted
if
the
system
is
in
synchronism
,
or
blocked
if
the
system
is
out
of
synchronism
.
The
pause
time
setting
is the
time
that is
permitted
for
a
synchronism
check
input
to
be
produced
and is started
when
a
reclose
output
is
called
for
.
If
a
synchronism
check
input
is
not
present
when
the
pause
time
elapses
,
the
SLR
will
go
immediately
to
lockout
.
Note
that
a
synchronism
check
input
is
required
at
all
selected
reclosures
when
the
pause
function
is
implemented
.
If
it
is desired
not
to
synchronism
check
a
reclosure
,
some
means
must
be used
to
bypass
the
synchronism
check
input
at
the
reclosure
where
synchronism
check
is
not
wanted
.
For
example
,
the
RS
normally
-
closed
contact
may
be
used
to
eliminate
the
synchronism
check
requirement
for
an
instantaneous
reclosure
by
connecting
it
as
shown dotted
in
Figure
6
.
For
this
connection
to
be
effective
for
the described
condition
,
RS
should
be
set
to
pick
up
with
0
time
and
to
drop
out
at
lockout
.
In
this
way
,
synchronism
check
will
be
required
on
all
delayed
reclosures
but
not
on
the instantaneous
reclosure
.
Delayed
Reset
Some
applications
may
require
a
delay
in
(
extension
of
)
the
reset
time
to
allow
certain
events
to
occur
before
the
SLR
is
allowed
to
go
to reset
.
For
example
,
it
may
take
a
time
overcurrent
function
a
very
long
time
to
operate
for
low
-
level
ground
faults
,
whereas
the
phase
time
overcurrent
functions
may
operate
very
quickly
.
Thus
,
long
reset
times
may
be
required
to
accommodate
the low
-
level
ground
faults
,
whereas shorter
reset
times
may
be
required
for
phase
faults
.
The
pause
input
to
the
SLR
relays
can
be
used
to
accomplish
this
requirement
.
A
simplified
connection
diagram
to meet
this
requirement
is
shown
in
Figure
7
.
Note
that
a
sensitively
-
set
instantaneous
overcurrent
(
IOC
)
function
and
an
auxiliary
function
79
X
are
required
.
With
this connection
,
the
pause
input
will
be
open
whenever
IOC
operates
.
The
pause
time
will
last
as
long
as
IOC
is
picked
up
or
until
the
pause
time
elapses
,
and
the
reset
time
will
be
extended
accordingly
.
In
this
way
,
time
will
be
allowed
for
the
TOC
to
operate
before
the
SLR
resets
.
7
Courtesy of NationalSwitchgear.com

GEK
-
86653
Pause
Function
-
Dual
Use
Two
separate
and
distinct
applications
have
been
described
using
the
pause
function
.
It
is
possible
to
use
the
pause
function
during
both
reclose
and
reset
,
but
special
connections
are
required
,
as
shown
in
Figure
8
.
Note
that
although
the
synchronism
check
and
reset
delay
functions
are
totally
isolated
in
this
example
,
they
both
operate
for
a
common
pause
time
;
i
.
e
.
,
it
is
not
possible
to
use
separate
pause
time
settings
when
the
pause
function
is
used
for
a
dual
purpose
.
Special
Input
Capabilities
There
are
4
special
input
capabilities
designed
into
the
SLR
12
recloser
to
increase
the
flexibility
in
its
application
.
A
signal
on
the
DR
input
will
cause
the
recloser
to
skip
the
first
selected
reclose
.
(
The
SLR
11
was
designed
to
skip
Instantaneous
with
a
DR
signal
.
)
1
.
The
recloser
can
now
be
set
up
as
a
1
shot
recloser
with
a
short
-
time
or
long
-
time
delay
using
the
DR
input
.
(
The
52
a
input
The
reclose
cycle
can
be
operated
using
the
52
b
input
only
,
stud
#
9
must
be
connected
to
relay
stud
#
2
on
the
SLR
12
A
or
to
stud
#
4
on
the
SLR
12
B
.
)
2
.
This
connection
was
included
in
the
design
for
applications
where
only
one
signal
was
available
for
reclosing
;
it
requires
that
the
signal
have
a
bounce
time
less
than
16
milliseconds
.
reclosing
where
a
52
a
and
a
52
b
signal
are
available
!
During
the
reset
time
(
52
a
closed
and
52
b
open
)
the
recloser
can
be
returned
to
the
reset
condition
by
opening
52
a
for
.
3
seconds
or
more
.
When
52
a
closes
,
the
recloser
will
go
to
reset
.
This
connection
is
not
recommended
for
3
.
During
the
reclose
time
(
52
a
open
and
52
b
closed
)
,
the
recloser
can
be
put
directly
into
the
lockout
condition
by
opening
52
b
for
.
3
seconds
or
more
.
When
52
b
closes
,
the
recloser
will
go
to
lockout
.
4
.
Setting
Up
the
SLR
12
to
Operate
as
an
SLR
11
The
The
SLR
12
is
designed
to
operate
as
a
direct
replacement
for
the
SLR
11
.
following
is
the
procedure
for
setting
the
SLR
12
to
operate
in
an
SLR
11
case
without
changing
any
wiring
to
the
SLR
11
case
.
Set
P
9
to
the
out
position
.
Set
Pll
to
the
B
to
2
position
.
Set
P
6
to
the
N
.
O
.
position
.
Set
P
7
to
the
N
.
C
.
position
.
If
the
SLR
12
B
(
AC
recloser
)
is
being
used
,
set
PI
to
the
correct
voltage
.
Program
the
recloser
.
1
.
2
.
3
.
4
.
5
.
6
.
8
Courtesy of NationalSwitchgear.com

GEK
-
86653
It
should
be
noted
that
the
SLR
12
does
not
need
a
manual
close
signal
(
Stud
8
on
the
SLR
11
)
.
With
P
9
set
to
the
OUT
position
,
any
signal
at
Stud
8
of
the
relay
case
will
be
ignored
.
With
the
signal
at
stud
8
ignored
,
the
position
of
P
10
is
irrelevant
.
Because
Stud
11
is
not
used
on
the
SLR
11
case
,
the
position
of
P
8
is
irrelevant
.
OPERATION
SLR
12
Inputs
and
Outputs
The
SLR
12
family
of
relays
consists
of
2
models
,
input
with
an
input
voltage
of
48
,
125
,
250
volts
DC
(
see
Figure
9
)
.
designed
for
an
AC
input
with
an
input
voltage
of
120
/
240
volts
AC
(
see
Figure
10
)
.
The
SLR
12
A
is
designed
for
a
DC
The
SLR
12
B
is
Each
model
has
4
inputs
and
5
outputs
as
listed
below
.
Inputs
:
"
Delayed
Reclose
"
is
used
to
skip
the
first
selected
reclose
signal
.
"
Pause
"
is
used
to
delay
the
start
of
the
reclose
signal
,
or
to
extend
the
reset
time
,
or
both
.
Auxiliary
contacts
of
the
circuit
breaker
used
to
indicate
the
state
of
the
breaker
.
DR
P
52
a
,
52
b
Outputs
:
"
In
Progress
"
is
used
to
indicate
that
the
recloser
is
in
progress
for
a
reclose
or
reset
.
"
Relay
Spare
"
is
an
auxiliary
relay
which
can
be
operated
at
any
selected
reclose
with
adjustable
pickup
and
dropout
times
.
"
Lockout
"
is
used
to
indicate
the
relay
is
in
lockout
,
stud
15
is
shared
by
IP
and
L
0
.
)
"
Block
Instantaneous
"
operates
at
the
first
reclose
signal
and
remains
on
until
the
recloser
is
reset
.
"
Reclose
"
is
the
reclose
signal
.
The
reclose
relay
is
a
telephone
type
that
is
mounted
with
its
contacts
visible
through
the
front
of
the
SLR
relay
case
.
It
should
be
noted
that
shorting
bars
are
used
across
the
normally
-
closed
contacts
of
RS
and
BI
to
complete
the
circuits
if
the
connection
plug
is
withdrawn
from
the
case
.
IP
RS
(
Note
that
L
0
BI
REC
Surge
capacitors
are
installed
from
all
input
and
output
circuits
to
surge
ground
.
9
Courtesy of NationalSwitchgear.com

GEK
-
86653
Basic
Operation
The
recloser
is
not
enabled
until
all
of
the
CODE
switches
are
placed
in
the
"
1
"
position
and
the
ENTER
button
pushed
.
Note
that
the
NUMBER
switches
in
this
case
control
the
state
of
the
BI
,
RS
,
IP
and
LC
relays
on
loss
of
and
return
of
power
(
see
step
7
in
the
Programming
section
)
.
The
CODE
switches
must
all
be
left
in
the
"
1
"
position
for
the
recloser
to
remain
enabled
.
If
any
of
the
switches
are
set
to
"
0
"
,
the
recloser
will
be
disabled
and
will
not
respond
to
any
external
input
If
any
of
the
switches
are
set
to
"
0
"
,
the
LCD
display
will
be
blank
,
When
the
recloser
is
enabled
,
it
will
commands
.
indicating
that
the
recloser
is
disabled
,
display
RES
.
if
it
is
in
reset
or
L
.
O
.
and
B
.
I
.
if
it
is
in
lockout
.
Once
the
recloser
is
enabled
,
operation
is
controlled
by
the
breaker
auxiliary
"
a
"
and
"
b
"
switches
and
the
breaker
control
switch
52
CS
.
2
,
which
show
typical
external
connections
to
the
SLR
relays
.
Please
refer
to
Figures
1
and
If
the
breaker
is
closed
when
the
recloser
is
enabled
,
it
will
recognize
that
the
"
a
"
switch
is
closed
,
and
that
the
"
b
"
switch
is
open
,
and
will
"
awaken
"
in
the
reset
(
RES
)
position
.
RES
.
will
be
displayed
on
the
LCD
.
If
the
breaker
is
open
when
the
recloser
is
enabled
,
the
auxiliary
switches
will
be
in
the
opposite
state
;
the
recloser
will
recognize
this
and
it
will
"
awaken
"
in
the
L
0
"
Lockout
"
position
.
L
.
O
.
and
B
.
I
.
will
be
displayed
on
the
LCD
.
When
the
breaker
is
closed
manually
,
the
auxiliary
switches
will
transfer
state
(
"
a
"
closes
,
"
b
"
opens
)
and
the
recloser
will
start
to
count
down
from
a
time
equal
to
the
reset
setting
(
this
can
be
observed
on
the
LCD
)
.
At
the
end
of
the
reset
period
,
the
recloser
will
assume
the
reset
position
and
RES
.
will
be
displayed
on
the
LCD
.
If
the
breaker
were
to
trip
as
the
recloser
was
counting
down
,
the
auxiliary
switches
would
again
change
state
and
the
recloser
would
immediately
go
to
the
lockout
position
,
thus
preventing
any
further
reclosures
.
At
that
time
,
L
.
O
.
and
B
.
I
.
would
be
displayed
on
the
LCD
.
If
the
breaker
is
tripped
manually
,
the
recloser
will
count
down
to
the
first
reclosure
selected
(
no
countdown
if
instantaneous
was
selected
)
and
at
that
time
will
produce
an
output
to
reclose
the
breaker
,
however
,
because
the
5
-
5
C
contacts
of
the
control
switch
(
52
CS
)
will
be
open
at
that
time
.
At
the
instant
that
the
reclose
output
is
produced
,
the
recloser
will
check
to
see
if
the
breaker
auxiliary
switches
transfer
,
i
.
e
.
closes
.
A
time
limit
is
built
into
the
recloser
for
this
transfer
to
occur
,
and
is
equal
to
0.9
times
the
time
multiplier
in
seconds
(
see
Set
Time
Multiplier
in
the
Programming
section
)
.
Thus
,
if
a
time
multiplier
of
1.0
is
selected
,
the
transfer
of
the
auxiliary
switches
must
occur
within
0.9
seconds
after
a
reclose
output
is
produced
.
If
the
transfer
does
not
occur
within
this
time
period
,
the
recloser
will
immediately
go
to
lockout
,
following
a
manual
trip
,
the
recloser
will
go
to
lockout
following
any
manual
trip
.
THE
ABOVE
-
DESCRIBED
TIME
LIMIT
APPLIES
ANY
TIME
THAT
THE
RECLOSER
PRODUCES
A
RECL
0
SE
OUTPUT
.
No
reclosure
will
take
place
,
if
"
b
"
opens
and
"
a
"
Since
reclosing
is
prevented
by
the
control
switch
If
the
breaker
is
tripped
by
the
protective
relays
,
the
5
-
5
C
contacts
of
the
control
switch
will
be
closed
,
and
the
recloser
will
go
through
its
programmed
sequence
following
closure
of
the
"
b
"
switch
.
When
the
first
reclosure
point
is
reached
,
a
reclose
output
will
be
produced
to
close
the
breaker
.
If
the
breaker
closes
successfully
as
indicated
by
a
transfer
of
the
auxiliary
switches
within
the
specified
time
limit
,
the
recloser
will
start
to
count
down
to
reset
.
If
no
tripping
occurs
during
this
period
,
the
recloser
will
reset
and
be
ready
to
initiate
another
complete
reclose
cycle
when
called
for
.
If
a
trip
does
occur
during
the
reset
period
,
the
recloser
will
then
go
on
to
the
next
reclosure
,
if
one
has
10
Courtesy of NationalSwitchgear.com