
CEK—49896
CONTENTS
Description
Application
Ratings
Operating
Characteristics
Burden
Construction
Receiving.
Electrical
Drawout
Power
Acceptance
Seal—in
Periodic
Contact
Servicing
Renewal
Principles
Handling
Tests
Relays,
Requirements,
Tests
Circuit
Checks
Cleaning
Parts
and
and
Ceneral
Test
Routine
Storage
Ceneral
Maintenance
3
3
3
3
4
4
4
4
5
5
5
5
5
6
6
6
6
2

CEK-49896
Type
The
detection.
relay,
case.
12NGV29A(—)A
The
buses.
relay
The
depending
available
the
Model
The
VDC.
250
NOV
relay
It
associated
with
Typical
will
upon
12NGVZ9A(—)A
The
consists
external
indicate
which
voltage
relays
covered
relay,
diodes
of
ratings
are
by
of
designed
is
connections
whether
the
relay
continuously
SENSITIVE
(Formerly
these
two
resistors,
and
polarized
listed
is
available
is
GROUND
NGV29A
TYPE
0178A8900)
DESCRIPTION
instructions
telephone—type
APPLICATION
provide
to
such
for
ground
the
unit
in
the
RATINGS
rated
mounted
is
contacts
in
at
RELAY
is
relays,
sensitive
an
on
section
four
these
sensitive
a
in
application
the
close.
on
voltage
voltages.
DC
sensitive
a
and
Si
are
single—end
protection
shown
or
a
positive
size
ground
Ground
CRARACTERISTICS.
ratings:
relay
negative
sensitivity
24,
in
48,
for
polarized
drawout
Figure
ground
for
bus,
125
DC
6.
for
or
L
The
capable
interrupted
be
Table
Model
The
relay
telephone
The
the
(—)
and
of
is
I
**
and
sensitive
DC
R
telephone
momentarily
some
by
exceeded.
Volts
24DC
48DC
125DC
250DC
Inductance
repetitive
for
the
shown
in
12NGV29A(—)A
diode
two
shown
relay
is
relay
operate
and
bus
other
of
table.
relay
boards
will
relay
carrying
Interruption
average
protective
in
detect
to
contacts
30
suitable
CONTACT
trip
OPERATING
consists
contained
Figure
a
close
are
continuously
amperes
means
TABLE
INTERRUPTING
Capability
coil.
duty
are
PRINCIPLES
two
of
in
an
3.
current
its
leakage
contact,
250
at
if
the
I
ABILITY
1.0
1.0
0.5
0.25
The
approximately
telephone
single—ended
Si
which
rated
VDC
for
interrupting
(Amps)
Inductive**
non—inductive
relays,
to
ground
will
at
tripping
2
1/2
drawout
from
energize
3
duty,
capability
interrupting
times
sensitive
a
case.
either
amperes
either
but
the
A
the
and
should
shown
ratings
ratings
polarized
typical
(+)
the
are
in
or
L
or
3

cgK
-49896
relay,
R
indicates
to—ground
alarm
an
The
Model
current
energized
when
in
circuit
The
relay
L
The
burden
current
chart
resistance
depending
a
leakage.
or
I2NGV29A(—)A
detector.
has
DC
Voltage
imposed
drawn
out
the
values.
(—)
trip
is
DC—to—ground
a
will
available
maximum
a
24
48
125
250
by
Ri
internal
on
Tn
breaker.
The
close
Rating
by
the
and
connection
direction
the
leakage,
either
case
the
CHARACTERISTICS
telephone
contact
a
connecting
consists
that
relay
two
by
resistance—to—ground
Naximum
relay
R2
on
the
series,
in
diagram
ground—car’-ent
of
the
and
can
or
a
R
sensitive
be
3
and
(L
L
of
relays
studs
sensitivity
Resistance—to—Ground
BURD€N
DC
bus
under
divided
of
into
Figure
R
unit
output
used
and
8
the
5
pickup
wiLl
R)
for
to
15
30
normal
DC
for
DC
stud
1.25
5
flow.
relay
are
tripping
7,
as
listed
conditions
voltage.
the
will
close
the
K
K
K
K
resistor
The
indicate
a
for
output
or
if
desired.
below.
Sensitivity
contact
use
alarm.
will
Refer
and
T
unit
a
(÷)
to
as
ground—
relays,
A
(Ohms)
be
the
to
the
component
pickup
DC-
sound
and
seal—
The
relay
case
when
this,
the
relay
The
up
the
electrical
in
relay
to
two
thickness
be
included.
the
drawout
overlap
For
the
These
relays,
cartons
relay,
resulting
transportation
Office.
components
the
relay
its
case
(2)
must
when
electrical
designed
examine
from
relay
case,
inches
be
For
case
the
when
is
is
first
connections
this
is
suitable
indicated
outline
has
an
connecting
circuits
not
to
it
for
rough
company
are
in
connection
thick,
auxiliary
protect
handling
mounted
operation
disconnected
between
for
and
on
arid
drilling
plug
and
RECEIVING,
included
them
damage
any
and
promptly
CONSTRUCTION
in
a
cradle
but
by
the
block
either
semi—flush
appropriate
the
relay
brush,
is
withdrawn
the
external—connection
HANDLING
as
part
against
sustained
is
evident,
assembly
be
can
removing
case
block
be
can
hardware
order
dimensions,
as
shown
of
damage.
notify
or
AND
a
fle
easily
and
replaced
or
to
be
in
inserted.
control
in
the
that
removed
the
connection
the
surface
is
sure
see
Figure
Figure
STORAGE
Immediately
transit.
a
damage
nearest
is
cradle
by
a
mounting
available.
that
7,
diagrams
panel,
latched
when
test
proper
4.
to
If
claim
General
desired.
plug
block.
plug.
Every
provide
see
will
upon
injury
at
into
that
on
all
However,
hardware
circuit
Figures
be
receipt
once
Electric
a
completes
To
test
panels
adequate
shipped
or
with
drawout
To
do
panel
will
in
and
5
of
damage
Sales
the
6.
in
a
the
4

Reasonable
parts
the
If
original
Foreign
cover
relays
matter
is
care
irjurcd
cartons
removed,
should
nor
are
in
collected
and
not
th
a
cause
be
to
place
on
exercised
adjustments
installed
he
that
the
outside
trouble
CEK-49896
unpacking
in
disturbed.
free
is
the
in
itmuediately,
from
the
of
operation
the
moisture,
case
relay
they
may
of
the
find
in
should
dust
relay.
order
its
be
and
way
that
stored
metallic
inside
none
of
in
when
the
their
chips.
the
DRAWOUT
Since
they
all
be
effects
tested
be
plug
also
makes
be
requires
and
the
POWER
REQUIREMENTS,
Relays
rectified
operate
example,
contain
not
Apply
60%
resistor
test
a
RELAYS,
drawout
tested
of
without
used.
the
external
requiring
power.
properly,
can
of
across
resistor
GENERAL
in
enclosure
the
connections
Although
exercise
circuitry.
turn
than
more
rated
studs
across
relays
their
removing
GENERAL
DC
Unless
due
off
voltage
cases
only
this
of
control
to
during
ripple.
5%
and
4
studs
in
will.
greater
the
service
or
it
with
test
rectified
the
these
(see
6
4
ELECTRICAL
equivalent
an
accurately
he
from
the
plug
care,
power
dips
dips.
ACCEPTANCE
Table
the
and
5
and
operate
the
relay.
should
in
and
panel
allows
since
supply
the
Ifl
left
the
TESTS
in
steel
duplicated
by
Of
greater
connections
be
is
rectified
As
a
TESTS
to
studs
telephone
right
their
using
course,
tested
well
general
telephone
case.
filtered,
5(+)
relay
cases,
during
a
testing
using
power.
it
In
12XLA13A
12XLAl2A
the
made
are
rule,
and
6(—).
should
relay
is
this
testing.
flexibility,
DC
and
many
Zener
the
should
recommended
way
any
A
plug.
test
test
both
to
not
relays
diodes,
DC
source
Connect
pick
up.
pick
that
magnetic
relay
This
plug
also
it
the
relay
full—wave
will
should
test
a
Connect
up.
may
may
not
for
Rated
125
250
Note
the
that
studs
SEAL—IN
Short
relay
order
In
a
For
24
48
CIRCUIT
studs
does
more
Bus
VDC
VDC
VOC
VOC
the
mentioned
3
not
drop
to
accurate
Voltage
or
L
TEST
and
drop
out
R
8
relay
above.
to
out
L
test
or
stud
when
K,
of
60%
14.4
28.8
75
140
will
the
7
the
Rated
the
VDC
VDC
VDC
VDC
drop
and
DC
relay,
test
Bus
out
repeat
supply
TABLE
Voltage
whenever
resistor
refer
5
II
the
voltage
to
above
is
the
the
tests,
removed
must
section
test
be
Test
500K
2K
5K
10K
removed.
Resistor
resistor
and
from
SERVICING.
on
note
the
is
that
studs
Ohms
removed
L
the
mentioned.
from
or
R

GEK
896
-4
9
view
In
is
it
of
important
interval
the
and
enough
experience
requirements,
ACCEPTANCE
CONTACT
For
CLEANING
cleaning
consists
in
effect
left,
are
flexibility
use
with
knives,
an
the
rated
not
Connect
6.
Apply
operate.
the
between
user’s
TESTS
of
a
superfine
a
yet
of
adjustable
rheostat
voltage
vital
that
periodic
experience
it
be
relay
flexible
it
the
files,
to
is
checked
will
tool
PERIODIC
role
periodic
a
select
suggested
contacts,
strip
file.
abrasive
rheostat
for
set
studs
to
of
checks
with
at
clean
ensures
CHECKS
protective
test
will
periodic
the
that
an
a
of
metal
The
off
the
paper
of
maximum
5(+)
program
test
the
interval
flexible
polishing
any
cleaning
or
SERVICING
the
ohms.
and
AND
vary
with
value
ROUTINE
relays
depending
testing.
interval
points
of
corrosion
cloth
6(-);
in
be
followed.
listed
from
burnishing
etched—roughened
an
action
of
the
of
any
listed
neither
MAINTENANCE
the
operation
It
environment,
upon
Until
best
the
suited
under
one
to
two
tool
is
so
delicate
thoroughly
actual
kind
in
Table
the
to
L
of
recognized
is
user
to
ELECTRICAL
years.
should
surface,
and
points
clean
III
to
nor
the
be
that
relay
a
has
his
rapidly.
of
stud
R
power
type
accumulated
individual
TESTS
used.
resembling
rio
scratches
contact.
contacts.
4
relay
system,
that
of
and
the
relay
and
This
The
Do
stud
should
Reduce
should
resistance
Put
the
resistance;
rheostat;
Rated
Sufficient
replacement
When
ordering
Electric
complete
the
occur
remaining
rheostat
this
Bus
24VDC
48
125
250
quantities
of
Company.
nameplate
resistance
as
the
should
Voltage
VDC
VDC
VDC
any
renewal
listed
right
data,
(set
that
Specify
on
be
of
of
the
below
the
at
CR)
between
Related
Resistance
renewal
are
parts,
including
rheostat
rheostat.)
maximum
relay
to
15
30
worn,
address
the
under
should
the
Maximum
Operate
1.25K
5
K
K
K
RENEWAL
parts
broken
name
the
“Sensitivity”
resistance)
values
TABLE
to
Ground
or
the
of
serial
until
pick
should
the
the
up.
listed
III
Test
PARTS
damaged.
nearest
part
number,
to
in
be
left
studs
Measure
in
Table
Rheostat
Ohms
5K
15
K
50
K
75
K
kept
wanted,
of
in
Sales
the
“L”
Table
4
in
relay
and
the
III.
stock
Office
quantity
relay.
III.
5,
resistance
Sensitivity
Telephone
Pickup
1.75—
7
17
34
picks
and
-
—
—
for
of
(Measure
reduce
for
Relay
3K
14
K
35
K
70
K
the
the
required,
up.
This
of
prompt
General
the
the
the
and
6

GE
Power
Management
Anderson
215
Markham,
Canada
Tel:
Fax:
www.ge.comlindsyslpm
L6E
(905)
(905)
Avenue
Ontario
1B3
294-6222
201-2098