GE SPA11A User manual

GEK
-
65512
F
INSTRUCTIONS
STATIC
PILOT
WIRE
MONITORING
RELAY
TYPES
:
SPA
11
A
SPA
11
B
SPA
12
A
SPA
12
B
GE
Protection
and
Control
205
Great
Valley
Parkway
Malvern
,
PA
19355
-
1337
Courtesy of NationalSwitchgear.com

GEK
-
65512
CONTENTS
PAGE
INTRODUCTION
APPLICATION
OPTIONS
AND
FEATURES
RATINGS
TEMPERATURE
DIELECTRIC
STRENGTH
CONTACTS
TARGET
SEAL
-
IN
UNIT
SEISMIC
CAPABILITY
CHARACTERISTICS
OPERATING
PRINCIPLES
OPEN
PILOT
WIRES
SHORTED
PILOT
WIRES
GROUNDED
PILOT
WIRES
OPERATING
TIMES
TRANSFER
TRIP
LOW
PASS
FILTER
BURDENS
SETTINGS
CONSTRUCTION
RECEIVING
,
HANDLING
AND
STORAGE
ACCEPTANCE
TESTS
VISUAL
INSPECTION
MECHANICAL
INSPECTION
CRADLE
AND
CASE
BLOCKS
TARGET
SEAL
-
IN
UNIT
(
SPA
11
B
AND
12
B
)
TELEPHONE
RELAYS
ELECTRICAL
INSPECTION
250
DC
RATING
SENDING
END
UNDERCURRENT
DETECTION
(
SPA
11
A
AND
11
B
)
OVERCURRENT
DETECTION
(
SPA
11
A
AND
11
B
)
GROUND
DETECTION
(
SPA
11
A
AND
11
B
)
TRANSFER
TRIP
(
SPA
11
B
)
RECEIVING
END
UNDERCURRENT
DETECTION
(
SPA
12
A
AND
12
B
)
TRANSFER
TRIP
(
SPA
12
B
)
DIELECTRIC
TESTS
(
HIGH
POTENTIAL
TESTS
)
INTRODUCTION
HIPOT
TESTS
RESTORING
RELAY
TO
SERVICE
INSTALLATION
PROCEDURE
SETTING
THE
TAP
OF
THE
TARGET
SEAL
-
IN
UNIT
(
SPA
11
B
AND
12
B
)
SUPPLY
VOLTAGE
SETTING
TERMINAL
ARRANGEMENT
SETTING
PERIODIC
CHECKS
AND
ROUTINE
MAINTENANCE
CONTACTS
ELECTRICAL
TESTS
SERVICING
TELEPHONE
RELAYS
TARGET
SEAL
-
IN
UNIT
RENEWAL
PARTS
LIST
OF
ILLUSTRATIONS
3
3
4
5
5
5
5
5
6
6
6
7
7
7
7
8
9
9
9
10
12
12
13
13
13
13
13
13
14
14
14
14
14
14
15
15
15
15
15
16
17
17
17
17
17
18
18
18
19
19
19
19
21
2
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GEK
-
65512
STATIC
PILOT
WIRE
MONITORING
RELAY
TYPES
:
SPA
11
A
SPA
11
B
SPA
12
A
SPA
12
B
INTRODUCTION
The
Type
SPA
static
pilot
-
wire
-
monitoring
relays
are
designed
for
use
in
conjunction
with
an
SPD
pilot
-
wire
system
to
provide
detection
of
open
,
shorted
,
reversed
or
grounded
pilot
wires
.
The
relays
are
powered
by
a
dual
-
rated
,
self
-
contained
,
isolated
DC
-
to
-
DC
power
supply
,
to
reduce
the
possibility
of
battery
grounds
interfering
with
operation
of
the
pilot
-
wire
scheme
.
Models
are
available
with
48
/
110
-
125
volt
DC
ratings
.
The
Type
SPA
11
A
and
SPA
12
A
relays
provide
the
basic
pilot
-
wire
-
monitoring
functions
.
The
SPA
11
A
is
the
sending
-
end
relay
and
operates
in
conjunction
with
a
Type
SPA
12
A
receiving
-
end
relay
at
the
remote
terminal
(
or
terminals
)
of
two
(
or
three
)
terminal
lines
.
These
relays
will
close
contacts
and
operate
a
light
-
emitting
diode
(
LED
)
when
an
abnormal
pilot
-
wire
condition
is
detected
.
The
Type
SPA
11
B
and
SPA
12
B
relays
include
provisions
for
the
transmission
and
reception
of
direct
transfer
-
trip
signals
in
either
direction
,
as
well
as
the
basic
pilot
-
wire
-
monitoring
functions
.
The
SPA
monitoring
scheme
uses
a
low
-
level
DC
signal
in
order
to
avoid
interfering
with
the
primary
AC
pilot
wire
signal
(
SPD
relays
)
.
Within
the
SPA
relays
,
the
DC
monitoring
signal
is
separated
from
the
AC
signal
by
low
-
pass
filters
.
SPA
models
are
available
for
use
with
50
hertz
and
60
hertz
SPD
relays
.
The
Types
SPA
11
A
,
SPA
11
B
,
SPA
12
A
and
SPA
12
B
are
each
packaged
in
the
S
2
drawout
case
,
the
outline
and
panel
drilling
of
which
is
shown
in
Figure
11
.
APPLICATION
The
Type
SPA
static
relays
are
intended
for
application
as
pilot
-
wire
-
monitoring
relays
and
/
or
transfer
-
trip
relays
.
As
noted
above
,
they
are
designed
specifically
for
use
with
the
SPD
pilot
-
wire
relaying
system
.
When
only
the
monitoring
function
is
desired
,
the
Type
SPA
11
A
is
required
at
one
end
of
the
pilot
circuit
,
designated
as
the
sending
end
;
and
the
Type
SPA
12
A
is
required
at
the
remote
receiving
end
,
or
at
both
remote
ends
in
the
case
of
a
three
-
terminal
line
.
The
SPA
11
A
relay
at
the
sending
end
circulates
a
low
-
level
DC
current
around
the
pilot
loop
,
which
holds
the
contacts
of
the
undercurrent
(
UC
)
functions
in
both
the
sending
-
end
and
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
-
65512
receiving
-
end
relays
in
the
open
position
.
An
open
pilot
wire
will
result
in
the
closure
of
the
UC
contacts
and
operation
of
the
UC
LED
at
both
the
sending
and
receiving
ends
.
A
shorted
pilot
wire
,
resulting
in
a
significant
increase
in
the
monitoring
current
,
will
result
in
closure
of
the
contacts
of
the
overcurrent
(
OC
)
function
and
operation
of
the
OC
LED
in
the
sending
-
end
relay
,
and
the
closure
of
the
UC
function
contacts
at
the
receiving
end
.
A
grounded
pilot
-
wire
circuit
will
result
in
closure
of
the
contacts
of
the
ground
-
detection
function
and
operation
of
the
ground
-
indicating
LED
in
the
sending
-
end
relay
Specific
information
on
the
magnitude
of
the
circulating
current
,
and
operating
levels
of
the
UC
,
OC
and
ground
-
detection
functions
,
is
provided
in
the
section
on
CHARACTERISTICS
.
Elementary
diagrams
for
the
two
-
terminal
and
three
-
terminal
applica
-
tions
of
the
SPA
11
A
and
SPA
12
A
relays
are
provided
in
Figures
20
and
21
respectively
.
When
direct
transfer
tripping
over
the
pilot
wire
is
desired
,
in
addition
to
the
monitoring
functions
,
the
SPA
11
B
is
required
at
the
sending
end
and
the
SPA
12
B
at
the
receiving
end
.
These
"
B
"
relays
include
the
necessary
circuits
to
transmit
and
receive
the
direct
transfer
-
trip
signals
,
as
well
as
the
functions
required
to
monitor
the
pilot
-
wire
circuit
as
previously
described
.
Typical
elementary
diagrams
for
a
pilot
-
wire
relaying
system
with
monitoring
and
transferred
tripping
are
provided
in
Figure
22
for
two
-
terminal
lines
and
in
Figure
23
for
three
-
terminal
line
applications
.
These
diagrams
illustrate
the
two
-
way
transfer
-
trip
application
in
which
the
transfer
-
trip
signal
is
initiated
by
either
the
sending
-
end
relay
(
SPA
11
B
)
or
the
receiving
-
end
relay
(
SPA
12
B
)
.
When
the
transfer
-
trip
signal
is
to
be
sent
in
one
direction
only
,
the
same
relays
are
applied
but
the
TT
unit
would
not
be
used
at
the
transfer
-
trip
initiating
end
and
the
TTA
unit
would
not
be
Diagrams
for
tne
one
-
way
transfer
-
trip
application
used
at
the
transfer
-
trip
receiving
end
.
are
available
upon
request
.
OPTIONS
AND
FEATURES
There
are
four
types
of
SPA
relays
:
1
)
a
sending
-
end
relay
,
2
)
a
sending
-
end
relay
with
transfer
-
trip
capability
,
3
)
a
receiving
-
end
relay
,
and
4
)
a
receiving
-
end
relay
with
transfer
-
trip
capability
.
A
sending
-
end
relay
with
the
transfer
-
trip
feature
may
be
used
with
a
receiving
-
end
relay
without
the
transfer
-
trip
feature
and
vice
versa
.
The
basic
functions
of
the
four
types
of
SPA
relays
are
outlined
in
the
table
below
.
TABLE
I
FUNCTIONS
OF
THE
SPA
RELAYS
SENDING
RECEIVING
TRANSFER
TRIP
CAPABILITY
UNDERCURRENT
DETECTION
OVERCURRENT
GROUND
DETECTION
DETECTION
RELAY
END
END
SPA
11
A
SPA
11
B
SPA
12
A
SPA
12
B
X
X
X
X
XXX
X
X
X
X
X
XX
4
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GEK
-
65512
An
open
pilot
wire
will
result
in
undercurrent
detection
;
a
shorted
pilot
wire
will
result
in
overcurrent
detection
,
and
ground
on
either
conductor
of
the
pilot
wire
will
result
in
ground
detection
.
RATINGS
TEMPERATURE
These
relays
have
been
designed
for
continuous
operation
in
ambient
temperatures
between
-
20
oC
and
+
55
°
C
per
ANSI
Standard
C
37.90
-
1978
.
Over
this
range
,
the detection
levels
will
vary
by
not
more
than
three
percent
(
3
%
)
from
their
nominal values
at
20
<
>
C
.
In
addition
,
these
relays
will
not
malfunction
nor
be
damaged
if
operated
in
an
ambient
up
to
65
°
C
.
DIELECTRIC
STRENGTH
(
AC HIGH
-
POTENTIAL
TEST
)
For
the
purposes
of
dielectric
tests
,
the
SPA
relays
are
rated
600
volts
.
Per
ANSI
/
IEEE
C
37.90
-
1978
,
the
high
-
potential
test
voltage
is
2200
volts
AC
for
one
minute
.
As
described
in
the standard
,
relays
other than
new
should be
tested
at
75
%
of
this
voltage
.
CONTACTS
The
telephone
-
relay
output
contacts
in
the
SPA
will
make and
carry
30
amperes
for
tripping
duty
and
will
make and
carry
3
amperes
continuously
.
The
interrupting ratings
are
given
in
Table
II
.
TABLE II
INTERRUPTING
CURRENT
RATINGS
OF TELEPHONE
-
TYPE
RELAY
CONTACTS
AMPS
AC
VOLTS
INDUCTIVE
t
NON
-
INDUCTIVE
115
0.75
2.0
230
0.5
1.5
DC
VOLTS
48
1.0
3.0
125
0.5
1.5
250
0.25
1.0
t
The
inductive
rating
is
based
on an
L
/
R
ratio
of
0.1
second
.
5
Courtesy of NationalSwitchgear.com

GEK
-
65512
TARGET
SEAL
-
IN
UNIT
The
target
seal
-
in
unit
connected
to
studs
1
and
11
in
the
SPA
11
B
and
SPA
12
B
relays
has
the
ratings
and
characteristics
shown
in
Table
III
.
TABLE
III
RATINGS
AND
CHARACTERISTICS
OF
THE
TARGET
SEAL
-
IN
UNIT
TAP
0.2
2.0
DC
Resistance
jf
.
10
%
(
Ohms
)
Minimum
Operating
(
Amperes
)
Carry
Continuously
(
Amperes
)
Carry
30
Amps
for
(
Seconds
)
Carry
10
Amps
for
(
Seconds
)
60
Hz
Impedance
(
Ohms
)
Minimum
Dropout
(
Amperes
)
7
0.13
0.2
2.0
0.3
3
0.03
4
0.25
30
52
0.53
0.05
0.5
SEISMIC
CAPABILITY
The
Seismic
Fragility
Level
exceeds
3.5
g
ZPA
when
tested
using
a
biaxial
multi
-
frequency
input
motion
to
produce
a
Required
Response
Spectrum
in
accordance
with
ANSI
/
IEEE
C
37.98
-
1978
,
Standard
for
SeismicTesting
of
Relays
.
CHARACTERISTICS
OPERATING
PRINCIPLES
The
Type
SPA
relays
are
designed
to
detect
an
open
pilot
-
wire
,
a
shorted
pilot
wire
,
and
a
grounded
pilot
wire
in
a
protective
system
using
pilot
-
wire
relays
.
Type
SPD
pilot
-
wire
relays
are
covered
by
instruction
book
GEK
-
49794
.
The
Type
SPA
relays
operate
by
circulating
a
small
direct
current
of
approximately
0.75
milliamperes
through
the
pilot
wire
.
The
current
is
provided
by
the
power
supply
of
the
sending
-
end
monitoring
relay
(
SPA
11
A
or
SPA
11
B
)
.
The
receiving
-
end
monitoring
relay
(
s
)(
SPA
12
A
or
SPA
12
B
)
completes
the
circuit
loop
for
the
circulating
current
without
adding
or
subtracting
(
sourcing
or
sinking
)
any
current
.
OPEN
PILOT
WIRES
The
undercurrent
units
in
the
SPA
relays
are
energized
(
or
picked
up
)
under
normal
operating
conditions
.
When
an
open
circuit
of
the
pilot
wire
occurs
,
the
current
drops
to
zero
and
the
undercurrent
units
in
both
receiving
-
and
sending
-
end
relays
drop
out
and
the
UC
LED
indicators
light
.
This
is
the
extreme
case
of
the
undercurrent
condition
.
The
undercurrent
units
will
drop
out
forthe
circulating
currents
indicated
below
6
Courtesy of NationalSwitchgear.com

GEK
-
65512
TABLE
IV
UNDERCURRENT
DETECTION
LEVELS
RELAY
ARRANGEMENT
UNDERCURRENT
DETECTION
Sending
End
Receiving
End
Sending
End
Receiving
End
2
Terminal
2
Terminal
3
Terminal
3
Terminal
0.53
ma
or
less
0.43
ma
or
less
0.53
ma
or
less
0.21
ma
or
less
SHORTED
PILOT
WIRES
The
overcurrent
units
in
the
SPA
relays
are
normally
de
-
energized
(
or
dropped
out
)
.
When
a
short
circuit
of
the
pilot
wire
occurs
,
the
current
increases
significantly
,
causing
the
overcurrent
unit
in
the
sending
-
end
relay
to
pick
up
,
and
causing
the
OC
LED
indicator
to
light
.
All
the
current
circulates
through
the
short
circuit
,
thereby
reducing
the
current
at
the
receiving
end
(
s
)
to
zero
.
This
is
detected
by
the
undercurrent
unit
in
the
receiving
-
end
relay
(
s
)
.
A
short
circuit
is
the
extreme
case
of
the
overcurrent
condition
.
The
overcurrent
unit
of
the
sending
-
end
relay
will
pick
up
for
circulating
currents
of
1.35
milliamperes
or
greater
.
GROUNDED
PILOT
WIRES
When
the
resistance
-
to
-
ground
of
either
conductor
of
the
pilot
wire
falls
below
10
,
000
ohms
,
the
ground
unit
on
the
sending
-
end
relay
(
normally
dropped
out
)
will
pick
up
and
the
GND
indicator
LED
will
light
.
REVERSED
PILOT
WIRES
In
the
event
that
the
conductors
of
the
pilot
wire
are
accidentally
reversed
,
the
circulating
current
is
shunted
through
a
low
-
resistance
path
in
the
receiving
-
end
relay
.
This
results
in
overcurrent
detection
by
the
sending
-
end
relay
and
undercurrent
detection
by
the
receiving
-
end
relay
.
This
condition
is
the
same
as
in
the
case
of
shorted
pilot
wires
.
OPERATING
TIMES
The
operating
times
of
the
undercurrent
,
overcurrent
and
ground
detection
circuits
were
intentionally
made
slow
in
order
to
override
transient
disturbances
.
The
operating
times
vary
,
depending
upon
conditions
on
the
primary
system
,
application
arrangements
(
e
.
g
.
,
two
terminals
versus
three
terminals
)
,
and
the
extent
of
the
abnormal
condition
on
the
pilot
wire
.
The
values
in
Table
V
are
approximate
.
They
are
intended
to
give
a
general
idea
of
the
time
involved
.
7
Courtesy of NationalSwitchgear.com

GEK
-
65512
TABLE
V
APPROXIMATE
OPERATING
TIMES
UNIT
PILOT
WIRE
CONDITION
DETECTION
TIME
t
RESTORE
TIME
tt
UC
Open
Circuit
Short
Circuit
Grounded
Conductor
BOO
msec
.
300
msec
.
300
to
500
msec
.
2000
msec
.
700
to
2000
msec
.
400
to
800
msec
.
OC
GND
Detection
time
of
each
function
is
the
time
to
close
its
contact
upon
the
occurrence
of
the
condition
listed
in
the
table
.
Restore
time
for
each
function
is
the
time
to
reopen
its
contact
when
the
condition
listed
in
the
table
is
removed
and
normal
circuit
conditions
are
restored
.
t
tt
TRANSFER
TRIP
The
SPA
11
B
and
SPA
12
B
relays
can
send
a
transfer
-
trip
signal
over
the
pilot
wire
to
initiate
tripping
at
the
other
terminal
(
s
)
.
The
signal
can
be
sent
from
either
the
sending
-
end
relay
(
SPA
11
B
)
orthe
receiving
-
end
relay
(
SPA
12
B
)
.
It
will
initiate
the
tripping
of
both
the
local
and
remote
breakers
on
a
two
-
terminal
line
,
or
of
all
three
breakers
on
a
three
-
terminal
line
.
The
transfer
-
trip
signal
is
produced
by
energizing
the
coil
of
the
TTA
unit
through
an
external
contact
.
When
the
TTA
picks
up
,
it
reverses
the
polarity
of
the
DC
voltage
applied
to
the
pilot
wire
through
studs
7
and
8
.
The
reversed
-
polarity
voltage
on
the
pilot
wire
causes
the
operation
of
the
transfer
-
trip
(
TT
)
unit
in
the
local
and
remote
SPA
relays
.
The
TT
output
contact
connected
between
studs
1
and
11
is
provided
with
a
target
seal
-
in
unit
and
is
recommended
for
tripping
duty
.
The
TT
contact
between
studs
2
and
3
is
an
auxiliary
contact
and
has
no
target
seal
-
in
unit
.
The
operating
time
between
energizing
TTA
at
one
end
of
the
pilot
wire
and
picking
up
TT
at
the
other
end
(
remote
)
varies
slightly
with
the
length
of
the
pilot
wire
,
as
indicated
below
.
The
time
to
pick
up
the
local
unit
is
approximately
two
(
2
)
cycles
,
independent
of
the
length
of
the
pilot
wire
.
Remote
TT
Pickup
Time
Remote
TT
Dropout
Time
(
60
Hertz
Basis
)
(
60
Hertz
Basis
)
Short
Pilot
Wire
(
Series
R
=
0
ohm
)
Long
Pilot
Wire
(
Series
R
=
2000
ohms
)
approximately
4
cycles
approximately
6
cycles
approximately
5
cycles
approximately
6
cycles
8
Courtesy of NationalSwitchgear.com

GEK
-
65512
If
the
pilot
wire is
to
be used
only
for
the
transfer
trip
function
and
no
pilot
-
wire
-
differential
relays
are
connected
to
the
pilot
wire
,
the
operating
time
will
be
as
follows
:
Remote
TT
Pickup
Time
(
60
Hertz
Basis
)
approximately
2
cycles
approximately
3
cycles
Short
Pilot
Wire
Long
Pilot
Wire
The
transfer
-
trip
operating
time is
virtually
independent
of
station
battery
voltage
for
two
reasons
:
1
)
the
TT
units
are
energized
from
the
regulated
12
volt
power
supply
in
the
relay
;
and
2
)
the
operating
time
of
theTTA
units varies
only
slightly
with
battery
voltage
,
as
shown
in
Fig
.
12
.
LOW
PASS
FILTER
The
current
circulating through
the
pilot
wire is
monitored
through
a
low
-
pass
filter
in
each
of
the
SPA
relays
.
The
filter
serves
two
purposes
:
1
)
it
screens
out
the
AC
signals
transmitted
over
the
pilot
wire
by
the
SPD
relays
;
and
2
)
it
screens
out
any
AC
disturbances
or
"
noise
"
on
the
pilot
wire
.
Relay
models
are
available
for
use on
50
hertz
systems
and
60
hertz
systems
.
The
filters
are
slightly
different
,
to
ensure
adequate
attenuation
at
the
system
frequency
.
BURDENS
The
table
below
indicates
the
burdens
of
the
SPA
relays
on
the
DC
station
supply
under
normal
operating
conditions
.
TABLE
VI
DC
BURDENS
WITH TTA
ENERGIZED
48
V
110
V
125
V
48
V
110
V
125
V
SPA
11
A
SPA
11
B
SPA
12
A
SPA
12
B
60
ma
60
ma
60
ma
60
ma
25
ma
25
ma
25
ma
25
ma
30
ma
30
ma
30
ma
30
ma
150
ma
80
ma
90
ma
150
ma
80
ma
90
ma
Values
may vary
by
up
to
30
%
SETTINGS
The
SPA
relays
were
designed
and
are
factory
tested
such
that
calibration
by
the
user
is
unnecessary
.
There
are
no
adjustments
to
be
made
.
The
power
supplies
within
the
relay
must
be
set
by
the
user
to
correspond
with
the
DC
input
voltage
.
This
entails
the
positioning
of
two
adjacent
selectors
on
the
printed
-
circuit
board that
contains
the
power
supply
.
The
positions
are
clearly
labeled
on
the
printed
-
circuit
board
.
The
relays
that
include
the
transfer
trip
feature
(
SPA
11
B
and
12
B
)
contain
an
additional
voltage
link
to
be
set
.
It is
located
above the
target
seal
-
in
unit
on
the
mounting
plate
.
9
Courtesy of NationalSwitchgear.com

GEK
-
65512
The
receiving
-
end
relays
(
SPA
12
A
and
SPA
12
B
)
must
be
set
for
a
two
-
terminal
application
or
a
three
-
terminal
application
.
This
entails
the
positioning
of
a
selector
on
the
printed
-
circuit
board
.
The
target
seal
-
in
unit
tap
setting
should
satisfy
the
following
two
requirements
:
1
)
the
minimum
trip
-
circuit
current
should
be
enough
to
operate
the
target
seal
-
in
(
at
least
150
%
of
tap
is
recommended
)
;
and
2
)
the
target
seal
-
in
unit
resistance
on
the
tap
chosen
must
be
low
enough
so
that
the
required
trip
current
will
flow
.
CONSTRUCTION
The
Type
SPA
relays
are
assembled
in
the
small
-
size
,
double
-
ended
(
S
2
)
drawout
case
having
studs
at
both
top
and
bottom
ends
in
the
rear
for
external
connections
.
The
electrical
connections
between
the
relay
and
case
studs
are
through
stationary
molded
inner
and
outer
blocks
,
between
which
nests
a
removable
connection
plug
.
The
outer
blocks
attached
to
the
case
have
the
studs
for
the
external
connections
,
and
the
inner
blocks
have
the
terminals
for
the
internal
connections
.
The
four
types
of
SPA
relays
have
the
same
nameplate
,
which
is
shown
in
Figure
14
.
There
are
two
cutouts
for
the
LED
indicators
and
the
selector
pins
.
One
set
of
selector
pins
sets
the
DC
voltage
rating
,
and
the
other
selector
pin
sets
the
relay
for
two
-
or
three
-
terminal
line
applications
.
The
labels
between
the
cutouts
are
identical
for
all
four
types
of
SPA
relays
.
The
sending
-
end
relays
(
SPA
11
A
and
11
B
)
have
no
selector
pin
to
set
the
relay
for
two
-
or
three
-
terminal
applications
,
and
the
receiving
-
end
relays
(
SPA
12
A
and
12
B
)
have
no
OC
and
GND
indicator
LEDs
.
Every
circuit
in
the
drawout
case
has
an
auxiliary
brush
,
as
shown
in
Figure
13
,
to
provide
adequate
overlap
when
the
connecting
plug
is
withdrawn
or
inserted
.
Some
circuits
are
equipped
with
shorting
bars
(
see
internal
connections
in
Figures
1
,
2
,
3
,
and
4
)
.
The
relay
mechanism
is
mounted
in
a
steel
framework
called
the
cradle
,
and
is
a
complete
unit
with
all
leads
terminated
at
the
inner
blocks
.
This
cradle
is
held
firmly
in
the
case
with
a
latch
at
both
top
and
bottom
.
The
connection
plug
,
besides
making
the
electrical
connections
between
the
respective
blocks
of
the
cradle
and
case
,
also
locks
the
latch
in
place
.
The
cover
,
which
is
drawn
to
the
case
by
thumbscrews
,
holds
the
connection
plugs
in
place
.
On
the
relays
that
include
the
transfer
trip
feature
(
SPA
11
B
and
SPA
12
B
)
,
the
target
-
reset
mechanism
is
a
part
of
the
cover
assembly
.
The
relay
case
is
suitable
for
either
semiflush
or
surface
mounting
on
all
panels
up
to
two
inches
thick
,
and
appropriate
hardware
is
available
.
The
relay
is
shipped
with
hardware
suitable
for
mountinq
on
1
/
8
inch
steel
panels
.
Panel
thickness
,
if
other
than
1
/
8
inch
,
must
be
indicated
on
the
relay
order
to
ensure
that
proper
hardware
will
be
included
.
Outline
and
panel
drilling
is
shown
in
Figure
11
.
A
separate
testing
plug
can
be
inserted
in
place
of
the
connection
plug
to
test
the
relay
in
place
on
the
panel
,
either
from
its
own
source
of
current
and
voltage
,
or
from
other
sources
;
or
the
relay
can
be
drawn
out
and
replaced
by
another
that
has
been
tested
in
the
laboratory
.
10
Courtesy of NationalSwitchgear.com

GEK
-
65512
Figure
14
is
a
labeled
photograph
of
an
SPA
11
B
relay
.
With
the
exception
of
the
printed
circuit
boards
,
the
other
SPA
relays
have
the
same
construction
,
with
parts
as
indicated
in
Table
VII
.
Surge
capacitors
are
not
included
in
Table
VII
(
refer
to
the
internal
connections
diagrams
,
Fig
.
1
through
4
)
.
TABLE
VII
CONSTRUCTION
VARIATIONS
RELAY
TRANSFER
TRIP
PARTSt
OC
UNIT
UC
UNIT
GND
UNIT
GND
REACTOR
SPA
11
A
SPA
11
B
SPA
12
A
SPA
12
B
X
X
X
X
X
X
XXX
X
X
X
tTransfer
Trip
Parts
:
TT
Unit
Target
Seal
-
in
Unit
TTA
Unit
DC
Voltage
Volt
Link
R
8
-
150
Ohm
Resistor
R
93
-
1000
Ohm
Resistor
R
94
-
1000
Ohm
Resistor
R
95
-
MOV
There
are
six
different
printed
-
circuit
boards
used
in
the
four
SPA
relays
as
indicated
in
Table
VIII
.
The
sending
-
end
relays
,
SPA
11
A
and
11
B
,
each
contain
two
printed
-
circuit
boards
and
the
receiving
-
end
relays
,
SPA
12
A
and
12
B
,
each
contain
one
printed
-
circuit
board
.
For
later
model
SPA
relays
(
identified
by
a
"
Rev
.
A
"
following
the
model
number
)
there
is
a
new
PCB
-
1
,
power
supply
and
detection
board
.
The
following
tables
indicate
board
positions
for
the
original
and
"
Rev
.
A
"
models
.
The
internal
-
connection
diagrams
for
the
printed
-
circuit
boards
are
shown
in
Figures
5
through
10
.
TABLE
Vlll
-
A
PRINTED
CIRCUIT
BOARD
INFORMATION
Original
Models
PCB
TRANSFER
ASSEMBLY
RELAY
:
PC
Board
NUMBER
Hz
FRONT
VIEW
50
/
60
POSITION
TRIP
LED
INDICATORS
CIRCUITRY
Left
Slot
(
1
)
Power
Supply
(
Yellow
)
Right
Slot
(
3
)
UC
,
OC
,
GND
(
All
Red
)
Left
Slot
(
1
)
Power
Supply
(
Yellow
)
Right
Slot
(
3
)
UC
,
OC
,
GND
(
All
Red
)
Right
Slot
(
2
)
Power
Supply
(
Yellow
)
,
UC
(
Red
)
Right
Slot
(
2
)
Power
Supply
(
Yellow
)
,
UC
(
Red
)
SPA
11
A
:
PCB
-
1
SPA
11
A
:
PCB
-
2
0184
B
8614
0184
B
8617
G
2
/
G
1
G
2
/
G
1
NO
NO
SPA
11
B
:
PCB
-
1
SPA
11
B
:
PCB
-
2
0184
B
8612
0184
B
8616
G
2
/
G
1
G
2
/
G
1
YES
YES
SPA
12
A
:
PCB
-
1
0184
B
8615
G
2
/
G
1
NO
SPA
12
B
:
PCB
-
1
0184
B
8613
G
2
/
G
1
YES
11
Courtesy of NationalSwitchgear.com

GEK
-
65512
TABLE
Vlll
-
B
PRINTED
CIRCUIT
BOARD
INFORMATION
SPA
MODELS
IDENTIFIED
AS
"
REV
.
A
"
PCB
TRANSFER
ASSEMBLY
RELAY
:
PC
BOARD
NUMBER
HZ
FRONT
VIEW
50
/
60
POSITION
TRIP
LED
INDICATORS
CIRCUITRY
SPA
11
A
:
PCB
-
1
0184
B
8730
G
2
/
G
1
Left
Slot
(
1
)
Power
Supply
(
Yellow
)
NO
SPA
11
A
:
PCB
-
2
0184
B
8617
G
2
/
G
1
Right
Slot
(
3
)
UC
,
OC
,
GND
(
All
Red
)
NO
SPA
11
B
:
PCB
-
1
0184
B
8730
G
4
/
G
3
Left
Slot
(
1
)
Power
Supply
(
Yellow
)
YES
SPA
11
B
:
PCB
-
2
0184
B
8616
G
2
/
G
1
Right
Slot
(
3
)
UC
,
OC
,
GND
(
All
Red
)
YES
SPA
12
A
:
PCB
-
1
0184
B
8730
G
6
/
G
5
RightSlot
(
2
)
Power
Supply
(
Yellow
)
,
NO
UC
(
Red
)
SPA
12
B
:
PCB
-
1
0184
B
8730
G
8
/
G
7
RightSlot
(
2
)
Power
Supply
(
Yellow
)
,
YES
UC
(
Red
)
RECEIVING
,
HANDLING
AND
STORAGE
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
injury
or
damage
resulting
from
rough
handling
is
evident
,
file
a
damage
claim
at
once
with
the
transportation
company
and
promptly
notify
the
nearest
General
Electric
Sales
Office
.
When
the
relay
is
received
,
check
the
nameplate
stamping
to
make
sure
that
the
model
number
and
rating
of
the
relay
agree
with
the
requisition
.
Reasonable
care
should
be
exercised
in
unpacking
the
relay
in
order
that
none
of
the
parts
are
injured
or
the
adjustments
disturbed
.
If
the
relays
are
not
to
be
installed
immediately
,
they
should
be
stored
in
their
original
cartons
in
a
place
that
is
free
from
moisture
,
dust
and
metallic
chips
.
Foreign
matter
collected
on
the
outside
of
the
case
may
find
its
way
inside
when
the
cover
is
removed
,
and
cause
trouble
in
the
operation
of
the
relay
.
ACCEPTANCE
TESTS
Immediately
upon
receipt
of
the
relay
an
inspection
and
acceptance
test
should
be
made
to
make
sure
that
no
damage
has
been
sustained
in
shipment
.
These
tests
may
be
performed
as
part
of
the
installation
,
or
as
acceptance
tests
or
both
,
at
the
discretion
of
the
user
.
12
Courtesy of NationalSwitchgear.com

GEK
-
65512
VISUAL
INSPECTION
Check
the
nameplate
stamping
to
make
sure
that
the
model
number
and
rating
relay
agree
with
the
requisition
.
Check
that
the
model
number
on
the
label
in
the
D
the
case
agrees
with
the
nameplate
.
Remove
the
relay
from
its
case
and
check
that
there
are
no
broken
or
cracked
molded
parts
or
other
signs
of
physical
damage
,
and
that
all
screws
are
tight
.
of
the
ack
of
MECHANICAL
INSPECTION
Cradle
and
Case
Blocks
Check
that
the
fingers
on
the
cradle
and
the
case
agree
with
the
internal
connection
diagram
.
Each
cradle
finger
should
be
flush
or
project
above
the
barrier
between
finge
Check
that
there
is
a
coil
spring
under
each
finger
.
The
case
fingers
,
if
not
held
down
D
shorting
bar
,
should
come
within
one
-
sixteenth
(
1
/
16
)
of
an
inch
of
touching
a
straight
edge
bridging
the
case
block
from
side
to
side
.
If
a
finger
is
held
down
by
a
shorting
bar
,
it
should
require
at
least
one
pound
of
force
(
450
grams
)
to
open
the
electrical
circuit
between
the
finger
and
the
shorting
bar
.
See
Figure
13
.
Check
that
each
auxiliary
brush
extends
above
the
barrier
between
fingers
.
ers
.
y
a
Target
Seal
-
in
Unit
(
SPA
11
B
and
12
B
)
Pick
up
the
armature
by
hand
.
The
orange
target
should
appear
.
When
the
armature
is
released
,
the
target
should
remain
in
view
.
Push
in
on
the
reset
arm
.
The
target
should
drop
from
view
.
Hold
the
armature
up
by
hand
.
The
target
should
not
be
at
the
end
of
its
travel
.
Verify
this
by
reaching
in
one
of
the
windows
of
the
target
with
a
sharp
instrument
,
such
as
a
knife
or
scribe
,
and
pushing
upward
.
The
target
should
move
definitely
upward
(
at
least
one
sixty
-
fourth
of
an
inch
,
or
0.4
millimeter
)
.
Release
the
armature
.
The
target
should
fall
visibly
downward
(
at
least
0.010
inch
or
1
/
4
millimeter
)
before
the
target
is
caught
by
the
latch
.
Telephone
Relays
Observe
each
telephone
relay
in
the
de
-
energized
position
.
Check
that
each
normally
open
contact
has
a
gap
spacing
of
at
least
0.010
inch
or
0.25
millimeter
.
Check
that
each
normally
-
closed
contact
has
a
contact
pressure
of
at
least
five
grams
(
5
g
)
by
deflecting
the
stationary
contact
away
from
the
moving
contact
with
a
force
gage
.
Operate
each
telephone
relay
by
pressing
on
the
armature
.
In
the
operated
position
,
check
that
each
normally
closed
contact
has
at
least
0.010
inch
(
0.25
millimeter
)
gap
.
Check
that
each
normally
open
contact
has
at
least
0.005
inch
(
0.13
millimeter
)
of
overtravel
after
contact
,
by
observing
that
the
contact
still
closes
with
a
0.0025
inch
(
0.06
millimeter
)
shim
inserted
between
the
armature
and
pole
piece
.
ELECTRICAL
INSPECTION
The
correct
operation
of
the
contacts
may
be
verified
by
manually
operating
the
telephone
relays
and
monitoring
the
contacts
with
an
ohmmeter
.
13
Courtesy of NationalSwitchgear.com

GEK
-
65512
250
DC
Rating
The
250
DC
rating
is
accomplished
with
an
external
pre
-
regulator
,
0138
B
7511
G
2
and
G
3
.
The
pre
-
regulator
is
a
DC
-
to
-
DC Convertor
that reduces the
250
VDC
station
voltage
to
the
125
VDC
rating
of
the
SPA
relay
.
Therefore
,
when this
pre
-
regulator
is
used
,
the
SPA
relay
DC
pins
on
the
125
volt
position
.
The
pre
-
regulator
in
designed
to
be mounted
on
the
panel
next
to
the
relay
.
The
electrical
connections
for
the
pre
-
regulator
are
made
as
follows
:
PRE
-
REGULATOR
TERMINAL
OUTPUT
PRE
-
REGULATOR
TERMINAL
TO
SPA
RELAY
TERMINAL
INPUT
+
250
VDC
+
125
VDC
B
4
A
5
DC C DC
C
Sending
End
Undercurrent
Detection
(
SPA
11
A
and
11
B
)
Refer
to test
plug
connection
diagram
,
Figure
15
.
Apply
DC
power
to
studs
4
(
positive
) (
+
)
and
5
(
negative
) (
-
)
.
Be
sure
that the
power
supply
selector
pins
on
printed
-
circuit
board
#
1
(
left
hand board
)
are
set
properly
for
the
DC
voltage
being
used
.
It
is
necessary
to
remove
the
nameplate
and card
guide
to
reposition
the
selector
pins
.
Connect
a
39
,
000
ohm
external
resistor
(
rated
1
/
4
watt
)
between
studs
7
and
8
.
The
UC
telephone
relay
should
drop
out
and the
UC
indicator
LED
should
light
.
Replace
the
resistor
with
a
20
,
000
ohm
resistor
.
The
UC
telephone
relay
should be
picked
up
and the
UC
indicator
LED
should
be
off
.
Overcurrent
Detection
(
SPA
11
A
and
11
B
)
Refer
to test
plug
connection
diagram
.
Figure
15
.
Repeat
the
undercurrent
test
using
the
following
resistors
:
With
6
,
200
ohms
(
1
/
4
watt
)
,
the
OC
telephone
relay
should
pick
up
and the
OC
LED
should
light
.
With
13
,
000
ohms
,
the
OC
telephone
relay
should
be
dropped
out
and
the
OC
indicator
LED
should be
off
.
Ground
Detection
(
SPA
11
A
and
11
B
)
Refer
to
test
plug
connection
diagram
,
Figure
16
.
Apply
DC
power
to
studs
4
(
positive
) (
+
)
and
5
(
negative
) (
-
)
.
Connect
a
10
,
000
ohm
external
resistor
(
rated
1
/
4
watt
)
between
studs
7
and
16
.
The
GND
telephone
relay
should
pick
up
and
the
GND
indicator
LED
should
light
.
Transfer
Trip
(
SPA
11
B
)
Refer
to test
plug
connection
diagram
,
Figure
17
.
14
Courtesy of NationalSwitchgear.com

GEK
-
65512
Connect
a
24
,
000
ohm
external
resistor
(
rated
1
/
4
watt
)
between
studs
7
and
8
.
Be
sure
that
the
DC
voltage
link
above
the
target
seal
-
in
unit
is
in
the
proper
position
.
Apply
75
%
of
rated
voltage
to
studs
4
(
positive
)
(
+
)
and
5
(
negative
)
(
-
)
and
to
studs
19
(
positive
)
(
+
)
and
20
(
negative
)
(
-
)
.
Verify
that
the
TTA
and
TT
telephone
relays
pick
up
.
Receiving
End
Undercurrent
Detection
(
SPA
12
A
and
12
B
)
Referto
test
plug
connections
diagram
,
Figure
18
.
Apply
dc
power
to
studs
4
(
positive
)
(
+
)
and
5
(
negative
)
(
-
)
.
Be
sure
that
the
power
-
supply
selector
pins
on
the
printed
-
circuit
board
are
set
properly
for
the
DC
voltage
being
used
.
Set
the
two
-
or
three
-
terminal
selector
pin
on
the
printed
-
circuit
board
in
the
two
-
terminal
position
.
Connect
a
24
volt
DC
power
supply
in
series
with
a
30
,
000
ohm
resistor
(
rated
1
/
4
watt
)
between
studs
7
(
positive
)(
+
)
and
8
(
negative
)
(
-
)
.
The
UC
telephone
relay
should
drop
out
and
the
UC
indicator
LED
should
light
.
Replace
the
resistor
with
a
10
,
000
ohm
resistor
.
The
UC
telephone
relay
should
be
picked
up
and
the
UC
indicator
LED
should
be
off
.
Set
the
two
or
three
-
terminal
selector
pin
in
the
three
-
terminal
position
.
Repeat
the
above
tests
using
a
62
,
000
ohm
resistor
(
UC
LED
should
light
)
and
a
30
,
000
ohm
resistor
(
UC
LED
should
be
off
)
.
TransferTrip
(
SPA
12
B
)
Referto
test
plug
connection
diagram
,
Figure
19
.
Connect
a
24
volt
DC
supply
in
series
with
an
11
,
000
ohm
resistor
(
rated
1
/
4
watt
)
between
studs
7
(
positive
)(
+
)
and
8
(
negative
)(
-
)
.
Be
sure
that
the
DC
voltage
link
above
the
target
seal
-
in
unit
is
in
the
proper
position
.
Apply
75
%
of
rated
voltage
to
studs
4
(
positive
)(
+
)
and
5
(
negative
)
(
-
)
and
to
studs
19
(
positive
)
(
+
)
and
20
(
negative
)
(
-
)
.
Verify
that
the
TTA
and
TT
telephone
relays
pick
up
DIELECTRIC
TESTS
(
HIGH
POTENTIAL
TESTS
)
Introduction
The
surge
capacitors
(
C
24
through
C
41
)
used
in
the
SPA
relays
do
not
have
voltage
ratings
to
withstand
AC
hipot
voltage
;
therefore
,
caution
must
be
exercised
when
hipotting
,
to
avoid
damaging
these
capacitors
.
It
is
recommended
that
hipot
tests
be
performed
on
a
bench
with
the
relay
in
its
case
.
If
the
relay
is
to
be
hipot
tested
together
with
other
apparatus
in
an
equipment
,
all
external
connections
to
terminals
6
and
16
(
surge
ground
)
must
be
removed
.
The
hipot
test
should
be
2200
volts
rms
,
50
or
60
hertz
for
new
relays
or
1650
volts
rms
,
50
or
60
hertz
for
other
relays
.
New
relays
are
defined
as
those
that
have
not
been
in
service
,
which
are
not
more
than
one
year
old
from
the
date
of
shipment
,
and
that
have
been
suitably
stored
to
prevent
deterioration
.
The
duration
of
application
of
the
test
voltage
for
both
new
and
old
relays
should
be
60
seconds
.
15
Courtesy of NationalSwitchgear.com

GEK
-
65512
Hi
pot
Tests
a
)
Remove
internal
connection
from
surge
capacitor
buses
to
surge
ground
terminals
6
and
16
.
b
)
Common
Mode
Hipot
Tests
(
All
terminals
to
case
)
Temporary
connections
should
be
made
to
tie
all
relay
terminals
together
.
Hipot
voltage
can
then
be
applied
between
this
common
connection
and
the
relay
case
.
c
)
Transverse
Mode
HipotTests
(
Between
circuits
)
For
hipot
tests
between
circuits
of
the
relay
,
the
surge
capacitors
must
be
temporarily
disconnected
from
the
surge
capacitor
buses
inside
the
relay
.
Hipot
voltage
can
then
be
applied
between
any
two
of
the
circuit
groups
indicated
in
Table
IX
.
Where
there
is
more
than
one
terminal
in
a
group
,
those
terminals
should
be
jumpered
together
.
An
alternate
test
using
a
500
DC
MeggerTM
can
be
performed
between
the
circuit
groups
of
Table
IX
with
the
surge
capacitors
connected
in
their
normal
manner
.
While
this
method
does
not
test
the
relay
to
its
full
dielectric
rating
,
it
will
detect
some
cases
of
degraded
insulation
.
TABLE
IX
CIRCUIT
GROUPING
FOR
TRANSVERSE
MODE
HIPOTTESTS
RELAY
TERMINALS
OF
CIRCUIT
GROUPS
SPA
11
A
a
.
4
,
5
b
.
7
,
8
c
.
9
,
10
d
.
12
,
13
e
.
14
,
15
f
.
17
,
18
Same
as
SPA
11
A
plus
:
g
.
1
,
11
h
.
2
,
3
i
.
19
,
20
SPA
11
B
SPA
12
A
a
.
4
,
5
b
.
7
,
8
c
.
9
,
10
d
.
12
,
13
Same
as
SPA
12
A
plus
:
e
.
1
,
11
f
.
2
,
3
g
.
19
,
20
SPA
12
B
16
Courtesy of NationalSwitchgear.com

GEK
-
65512
RESTORING
RELAY
TO
SERVICE
After
the
hipot
testinq
is
completed
,
the
surge
capacitors
should
be
reconnected
to
the
surge
capacitor
buses
,
the
surge
capacitor
buses
reconnected
to
studs
6
and
16
,
and
all
external
wiring
to
terminals
6
and
16
(
surge
ground
)
should
be
reconnected
.
INSTALLATION
PROCEDURE
Mount
the
relay
vertically
in
a
clean
,
dry
and
well
lighted
place
to
allow
accessibility
for
cleaning
,
inspection
and
testing
,
and
where
it
will
not
be
subjected
to
excessive
vibration
or
heat
.
Unless
mounted
on
a
steel
panel
that
adequately
grounds
the
relay
case
,
the
case
should
be
grounded
through
a
mounting
stud
or
mounting
screw
with
a
conductor
not
less
than
#
12
AWG
copper
wire
or
its
equivalent
.
It
may
be
necessary
to
remove
paint
from
the
case
at
the
point
of
connection
to
ensure
reliable
contact
.
Terminal
6
(
bottom
surge
ground
)
should
be
connected
to
the
lower
case
-
mounting
stud
and
terminal
16
(
top
surge
ground
)
should
be
connected
to
the
upper
case
-
mounting
stud
using
#
12
AWG
copper
wire
.
Also
,
terminals
6
and
16
should
be
tied
together
with
#
12
AWG
copper
wire
to
insure
adequate
grounding
(
see
external
jumpers
in
Figures
1
through
4
)
.
Check
the
nameplate
to
be
sure
that
the
relay
is
the
desired
model
number
.
The
section
on
ACCEPTANCE
TESTS
contains
all
the
tests
that
the
user
,
at
his
discretion
,
may
want
to
perform
as
part
of
the
installation
procedure
.
SETTING
THE
TAP
OF
THE
TARGET
SEAL
-
IN
UNIT
(
SPAIIBand
12
B
)
The
contact
adjustment
will
not
be
disturbed
if
the
following
procedure
is
followed
when
changing
the
tap
.
Take
either
one
of
the
two
screws
from
the
left
contact
plate
and
transfer
it
to
the
desired
tap
position
in
the
right
tap
plate
.
Then
remove
the
screw
from
the
undesired
tap
position
in
the
right
tap
plate
and
transfer
it
to
the
vacant
location
in
the
left
contact
plate
.
Do
not
leave
the
unit
with
screws
in
both
the
tap
locations
of
the
right
plate
.
SUPPLY
VOLTAGE
SETTING
Be
sure
to
set
the
two
selector
pins
on
the
printed
circuit
containing
the
power
supply
(
left
-
hand
board
in
the
sending
-
end
relays
,
only
board
in
the
receiving
end
relays
)
to
correspond
with
the
station
battery
voltage
.
For
SPA
relays
with
REV
A
on
the
nameplate
there
is
only
one
power
-
selection
link
to
set
.
Place
in
the
setting
corresponding
to
the
station
battery
.
For
the
SPA
11
B
and
12
B
,
which
contain
the
transfer
-
trip
feature
,
it
is
also
necessary
to
set
a
link
above
the
target
seal
-
in
unit
.
TERMINAL
ARRANGEMENT
SETTING
The
SPA
12
A
and
12
B
receiving
-
end
relays
are
to
be
set
for
either
a
two
-
or
a
three
-
accomplished
by
positioning
a
selector
pin
on
the
printed
terminal
arrangement
.
This
is
circuit
board
.
The
positions
are
clearly
labeled
on
the
board
.
17
Courtesy of NationalSwitchgear.com

GEK
-
65512
PERIODIC
CHECKS
AND
ROUTINE
MAINTENANCE
WARNING
:
HIGH
VOLTAGES
MAY
APPEAR
ON
PILOT
WIRES
UNEXPECTEDLY
AT
ANY
TIME
.
USE
APPROPRIATE
CARE
WHEN
MAKING
CONTACT
WITH
PILOT
WIRES
OR
EQUIPMENT
CONNECTED
TO
THEM
The
pilot
wire
protective
equipment
,
if
installed
,
is
designed
to
limit
the
pilot
-
wire
voltages
to
a
level
that
will
not
damage
the
wires
or
equipment
connected
to
them
.
It
does
not
limit
the
voltages
to
a
level
that
is
safe
for
unprotected
personnel
contacting
the
pilot
wires
or
connected
equipment
.
THEREFORE
,
USE
APPROPRIATE
CARE
WHEN
MAKING
CONTACT
WITH
PILOT
WIRES
,
EVEN
WHEN
THE
PILOT
-
WIRE
PROTECTIVE
EQUIPMENT
IS
IN
PLACE
.
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
points
listed
under
ACCEPTANCE
TESTS
be
checked
at
an
interval
of
from
one
to
two
years
.
Check
the
items
described
under
ACCEPTANCE
TESTS
-
VISUAL
INSPECTION
AND
MECHANICAL
INSPECTION
.
Examine
each
component
for
signs
of
overheating
,
deterioration
or
other
damage
.
Check
that
all
connections
are
tight
by
observing
that
the
lockwashers
are
fully
collapsed
.
CONTACTS
Examine
the
contacts
for
pits
,
arc
or
burn
marks
,
corrosion
,
and
insulating
films
.
For
cleaning
contacts
,
a
flexible
burnishing
tool
should
be
used
.
This
consists
of
a
flexible
strip
of
metal
with
an
etch
-
roughened
surface
,
resembling
in
effect
,
a
superfine
file
.
The
polishing
action
is
so
delicate
that
no
scratches
are
left
,
yet
any
corrosion
is
thoroughly
and
rapidly
cleaned
.
The
flexibility
of
the
tool
ensures
the
cleaning
of
the
actual
points
of
contact
.
Do
not
use
knives
,
files
,
abrasive
paper
or
cloth
of
any
kind
to
clean
relay
contacts
.
ELECTRICAL
TESTS
The
tests
described
in
the
electrical
inspection
of
the
ACCEPTANCE
TESTS
suffice
as
periodic
checks
for
the
SPA
relays
.
Refer
to
Figures
15
through
19
for
the
test
plug
connections
.
If
a
relays
fails
to
pass
one
or
more
of
these
tests
,
it
requires
servicing
.
18
Courtesy of NationalSwitchgear.com

GEK
-
65512
SERVICING
CAUTION
:
ALL
power
from
the
relay
before
removing
or
inserting
any
of
the
printed
-
circuit
boards
.
Failure
to
observe
this
caution
may
result
in
damage
to
and
/
or
misoperation
of
the
relay
.
Telephone
Relays
Adjustment
of
telephone
relays
requires
skill
and
experience
for
best
results
.
The
following
guidelines
may
be
of
assistance
.
Increasing
the
stroke
of
the
moving
spring
will
raise
pickup
,
as
will
decreasing
normally
-
closed
contact
overtravel
.
Increasing
normally
-
open
contact
overtravel
or
increasing
residual
gap
will
increase
dropout
.
After
adjusting
,
be
sure
to
check
gaps
and
overtravels
and
readjust
if
necessary
to
keep
them above
their
minimum values
.
Target
Seal
-
in
Unit
As
readjustment
of
the
target
seal
-
in
unit
may
affect
the
Seismic
Fragility
Level
,
it is
advised that
no
mechanical
adjustments
be
made
if
seismic
capability
is
of
concern
.
The
two
moving
contacts
should
be
horizontal and
both
should
meet
the
stationary
contacts
together
.
There should
be
approximately
one
sixty
-
fourth
inch
(
0.4
millimeter
)
gap
between
the
armature
and
the
pole
piece
when the
contacts
touch
.
Adjust
the
stationary
contact
positions
if
required
to
obtain these conditions
.
Usinq
well
-
filtered
direct
current
(
DC
)
,
check
the
pickup
and
dropout
current
and
compare
the
values
to
those
given
in
RATINGS
.
If
necessary
,
adjust
the
spring
tension
and
contact
overtravel
.
RENEWAL
PARTS
It
is
recommended
that
sufficient
quantities
of
renewal
parts
be
carried
in
stock
to
enable
the
prompt
replacement
of
any
that
are
worn
,
broken
or
damaged
.
Should
a
printed
-
circuit
card become
inoperative
,
it
is
recommended that this card be
replaced
with
a
spare
.
In
most
instances
,
the
user
will
be
anxious
to return
the
equipment
to
service
as soon
as
possible
and the
insertion
of
a
spare
card
represents
the
most
expeditious
means
of
accomplishing
this
.
The
faulty
card
can
then be returned
to
the
factory
for
repair
or
replacement
.
Although
it
is
not
generally
recommended
,
it
is
possible
,
with
the
proper
equipment
and trained
personnel
,
to
repair
cards
in
the
field
.
This
means
that
a
troubleshooting
program
must
isolate
the
specific
component
on
the card
that has
failed
.
By
referring
to
the
internal
-
connection
diagram
for
the
card
,
it
is
possible
to trace
through
the
card
circuit
by
signal
checking
and
,
hence
determine
which
component
has
failed
.
This
,
however
,
may
be
time
consuming
and
if
the card
is
being
checked
in
place
in
its
unit
,
as
is
recommendea
,
will
extend the
outage
time
of
the
equipment
.
See
Cautions
,
next
page
.
19
Courtesy of NationalSwitchgear.com

GEK
-
65512
CAUTION
:
Great
care
must
be
taken
in
replacing
components
on
the
cards
.
Special
soldering
equipment
suitable
for
use
on
the
delicate
solid
-
state
components
must
be
used
and
,
even
then
,
care
must
be
taken
not
to
cause
thermal
damage
to
the
components
,
and
not
to
damage
or
bridge
over
the
printed
circuit
buses
.
The
repaired
area
must
be
coated
with
a
suitable
high
-
dielectric
plastic
coating
to
prevent
possible
breakdowns
across
the
printed
-
circuit
buses
due
to
moisture
or
dust
.
ADDITIONAL
CAUTION
:
Dual
in
-
line
integrated
circuits
are
especially
difficult
to
remove
and
replace
without
specialized
equipment
.
Furthermore
,
many
of
these
components
are
used
on
printed
-
circuit
cards
that
have
bus
runs
on
both
sides
.
These
additional
complications
require
very
special
soldering
equipment
and
removal
tools
as
well
as
additional
skills
and
training
,
which
must
be
considered
before
field
repairs
are
attempted
.
When
ordering
renewal
parts
,
address
the
nearest
Sales
Office
of
the
General
Electric
Company
,
specify
quantity
required
,
number
of
the
relay
for
which
the
part
is
required
.
name
of
the
part
wanted
,
and
the
complete
model
Since
the
last
edition
,
Figures
20
and
21
have
been
revised
.
20
Courtesy of NationalSwitchgear.com