Table of Contents
target is displayed when
corner of the relay cover resets the
c
a
The pickup range
adjustabl e pol e piece.
stampings, an approximate val ue of
of
50%
p i ckup.
7
shows the v
Figure
en
of
h
B
d
data
r
t
e
u
PICKUP
RANGE (AMPS)
0.5 -
1
2
4
10
-
-
20
- 160
40
**Volt-amperes at
HIGH DROPOUT INSTANTANEOUS UNIT
The high d ropout instantaneous unit is similar to the standard instantaneous unit,
except the dropout current is approximatel y
to Figure
a photograph of the high d ropout unit, for the fol l owing d iscussion.
8,
The adjustabl e core
top view) l owers the pickup, whil e turning the core up (counterclockwise, top view)
increases
pi
c
up
the
k
loosened.
When l oosening or tightening the l ocknut, the sleeve
shading ring
is attached, must be held to prevent it from turning.
(D)
must be retightened a fter adjusting the core.
dropout l evel, thereby determining the quietness o f operation when in the picked-up
GEK-86105
the
unit operates.
t
a
be adjusted continuousl y over
n
When the top o f the core is 1 ined up with the calibration
pickup can be determined.
a
ri
a
t
on of operating time with
i
standard unit are tabulated in Table VIII.
TABLE VI II
BURDEN OF STANDARD INSTANTANEOUS UNIT
FREQ
AMPS
50
2
5
60
5
4
50
5
60
5
50
5
8
60
5
16
50
5
60
5
50
5
40
60
5
80
50
5
60
5
50
5
60
5
five amps
calculated from input at minimum
sets the pickup l evel .
(A)
.
Before
attempting
the button in the
Pressing
r
et
g
.
four-to-one range by using the
a
applied
VOLT -
IMPEDANCE
AMPS**
310
12.4
330
13.2
94
3.75
100
4.0
23
0.94
2 5
1.0
5.8
0.23
6.2
0.25
0.9
0.04
1.0
0.04
0.23
0.01
0.25
0.01
0.07
0.003
0.07
0.003
to
of the pickup current.
80
90%
Turning the core down
to turn the core, the
Rotating the shading ring sets the
8
lower
left
Dropout
is
bo
t
a
40
u
current for this
unit.
POWER
FACTOR
0.84
0.78
0.77
0.71
0. 77
0. 71
o.
77
0.71
0.77
0. 71
0.77
o.
71
0.71
(1 2 z).
0. 71
p
pi
c
k
u
Refer
(cl ockwise,
locknut (B)
must be
(C)
to which the
The l ocknut
to
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