GE IAC User Manual

GEK
-
86054
STANDARD
INSTANTANEOUS
UNIT
The
standard
instantaneous
unit
is
an
electromagnet
that
attracts
a
hinged
armature
when
sufficient
current
is
applied
,
contact
that
bridges
two
stationary
contacts
when
the
coil
is
energized
.
A
target
is
displayed
when
the
unit
operates
.
Pressing
the
button
in
the
lower
left
corner
of
the
relay
cover
resets
the
target
.
The
armature
carries
a
"
T
"
shaped
moving
The
pickup
range
can
be
adjusted
continuously
over
a
four
to
one
range
by
using
the
adjustable
pole
piece
.
When
the
top
of
the
core
is
lined
up
with
the
calibration
stampings
,
an
approximate
value
of
pickup
can
be
determined
.
Dropout
is
about
40
to
50
%
of
pickup
.
Figure
7
shows
the
variation
of
operating
time
with
applied
current
for
this
unit
.
Burden
data
of
the
standard
instantaneous
unit
is
tabulated
in
Table
IX
.
TABLE
IX
BURDEN
OF
STANDARD
INSTANTANEOUS
UNIT
IMPEDANCE
(
OHMS
)
POWER
FACTOR
VOLT
-
AMPStt
FREQ
PICKUP
RANGE
(
AMPS
)
(
HZ
)
AMPS
12.4
310
0.84
0.5
-
2
50
5
13.2
0.78
330
60
5
0.77
94
3.75
1
50
5
4
0.71
100
4.0
60
5
0.77
23
0.94
8
50
5
2
0.71
1.0
25
60
5
0.23
0.77
16
5
5.8
50
4
0.71
6.2
0.25
5
60
0.77
0.9
0.04
10
5
50
40
0.71
1.0
0.04
5
60
0.01
0.77
0.23
50
5
20
80
0.71
0.01
0.25
60
5
0.71
0.003
0.003
0.07
40
-
160
5
50
0.71
0.07
60
5
ft
Volt
-
amperes
at
5
amps
calculated
from
input
at
minimum
pickup
(
I
2
Z
)
.
CONSTRUCTION
The
IAC
66
A
,
B
,
and
C
relays
are
mounted
in
an
SI
case
(
that
does
not
have
an
upper
contact
block
)
.
The
case
is
suitable
for
either
semi
-
flush
or
surface
mounting
on
panels
up
to
two
inches
thick
.
Hardware
is
available
for
all
panel
thicknesses
.
To
be
sure
that
the
proper
hardware
will
be
provided
,
panel
thickness
should
be
specified
on
the
order
for
the
relay
.
Outline
and
panel
drilling
dimensions
are
shown
in
Figure
5
.
8
Courtesy of NationalSwitchgear.com

GE IAC Specifications

General

Brand	GE
Model	IAC
Category	Relays
Language	English