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Burden data for the standard instantaneous unit coils are given in Tabl e IV.
*
COIL-AMPS
Burden data for the high dropout instantaneous unit are given in Tabl e V.
*
The induction unit is the basic unit in all lAC relays. These units are of the induction-disk con
struction type.
The disk is actuated by a current operating coil on a laminated U-magnet. The disk shaft
carries the moving contact which compl etes the alarm or trip circuit when it touches the stationary contact.
The disk shaft is restrained by a spiral spring to give the proper contact-closing current and its motion is
retarded by a permanent magnet acting on the disk to give the correct time delay.
There is a seal-in unit mounted on the front to the l eft of the shaft.
and its contacts in parallel with the main contacts such that when the main contacts close the seal-in unit
picks up and seals in.
remains exposed until released by pressing a button beneath the l ower l eft corner of the cover.
The standard instantaneous unit is a small instantaneous hinge-type unit mounted on the right front side
of the induction unit.
Its coil is connected in series with the operating
When the current reaches a predetermined value, the instantaneous unit operates, closing the contact
and raising its target into view.
button beneath the lower left-hand corner of the relay cover.
The special high dropout instantaneous unit is constructed without a target, and is designed to drop-ou t
at
80
percent of pickup, or higher.
that it can be rotated to the most favorabl e position.
This unit is mounted in the rear of the relay.
the main unit but its contact is electricall y separate.
These rel ays, when not included as a part of a control panel, will be shipped in cartons designed to
protect them against damage.
damage sustained during shipment.
should be filed at once with the transportation company and the nearest Sales Office of the General Electric
Company notified promptl y.
*
Indicates revision
FREQ.
4 -
16
60
50
10 - 40
60
50
20 - 80
60
50
40 - 160
60
50
FREQ.
COIL-AMP S
2 - 6
60
50
4 -
12
60
50
10 - 30
60
50
20 - 60
60
50
When the seal-in unit picks up, it raises a target into view which latches up and
Its contacts are normal l y connected in parall el with the contacts of the main unit.
The target l atches in the exposed position until released by pressing the
The pole piece is constructed and secured with a special wave washer so
RECE IVING, HANDLING AND STORAGE
Immediately upon receipt of the rel ay, an examination shoul d be made for any
If injury or damage resulting from rough handl ing is evident, a claim
GEI-44233
TABLE IV
VOLT-AMPS
WATTS
5.0
4
.75
5:0
4.
75
0.8
3
0.79
0.80
0.76
0.21
0.20
0.20
0.19
0.052
0.0
49
0.05
0.048
TABLE V
V O
L
T - AMP S
WATTS
20.0
14.0
16.5
11.5
5.0
3.5
. 1
4
2.9
0.80
0.56
0.67
0.47
0.20
0
1 4
.
0.17
0.12
CONSTRUCTION
coil of
the main unit.
The armature has been shortened for the same purpose.
Its coil is connected in series with the operating coil of
5
p .F.
1
SEC. RATING
0.95
145 AMP
0.95
4
1
5
0.95
290
0.95
290
0.95
450
0.95
4
50
0.95
450
0.95
450
P.F.
SEC. RATING
1
0.70
75
0. 70
75
0. 70
145
0.70
145
0. 70
270
0.70
270
0.70
4
50
0.70
450
This unit has its coil in series
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