GEK-45376
TABLE 1 1
Rel ay
Hz
s
Min.
Max.
IFC66
50 and 60
1 8 . 0
1 9. 2
H I - SE I SM IC INSTANTANEOUS UN I T
Make sure that the instantaneous unit l ink is in the correct position for the range in which it is to
operate. See the interna l cOnnections diagram Figure 4 and connect as indicated in the test circuit of
Figure 1 6. Whenever possibl e use the higher range since the higher range has higher continuous rating.
�
Setting The Hi- Seismic Instantaneous Unit
(
C)
The instantaneous unit has an adjustab l e core l ocated at the top of the unit as shown in Figure 1 . To
set the instantaneous unit to a desired pickup l oosen the l ocknut and adjust the core. Turning the core
cl ockwise decreases the pickup, turning the core countercl ockwise increases the pickup. Bring up the current
s l ow l y until the unit picks up. It may be necessary to repeat this operation, until the desired pickup val ue
is obtained. Once the desired pickup va l ue is reached, tighten the l ocknut.
CAUT I ON:
REFER TO TABLE 5 FOR THE CONT I NUOUS AND ONE SECOND RAT I NGS OF THE I NSTANTANEOUS UN I T. DO NOT EXCEED
T HE SE RAT I NGS WHEN APPL Y ING CURRENT TO THE I NSTA NTANEOUS UN IT.
The range of the instantaneous unit (see Tab l e
5)
must be obtained between a core position of l /8 of a
turn of fu l l c l ockwise and 20 turns counterc l ockwise from the fu l l c lockwise position. Do not l eave the
core in the fu l l c l ockwise position.
1-! IGH D ROPOUT I NSTANTANEOUS UN IT
Make sure that the movabl e l ead (see Figure 2) is in the correct position for the range in which it is
to operate. Whenever possibl e use the higher range since the higher range has higher continuous rating. SeL
the interna l connections diagram Figure
5
and connect as indicated in the test circuit of Figure 1 6.
The
Instantaneous Unit
The high dropout instantaneous unit has an adjustab l e core l ocated at the top of the unit as shown in
Figure 2 . To set the instantaneous unit to a desired pickup l oosen the l ocknut and adjust the core. Turning
the core c l ockwise decreases the pickup, turning the core countercl ockwise increas�s the pickup. Bring up
the current s l ow l y until the unit picks up. It may be necessary to repeat this operation, until the desired
pickup va l ue is obtained . Once the desired pickup va l ue is reached, tighten the l ocknut. With the unit
picked up, s l ow l y reduce the current until the unit drops out. Dropout current must be 80 percent or
greater than the pickup va l ue .
CAUT I ON:
REFER TO TABLE 6 FOR THE CONT I NUOUS AND ONE SECOND RAT I NGS OF THE I NSTANTANEOUS UN IT. DO NOT EXCEED
THE SE RAT I NGS WHE N APPL Y I NG CURRENT TO THE I NSTANTANEOUS UN IT.
The range of the instantaneous unit (See Tab l e 6 ) must be obtained between a core position of l /8 of a
turn of ful l cl ockwise and 20 turns countercl ockwise from the ful l c l ockwise position.
HI- SE I SM IC TARGET AND SEAL - I N UN I T
The target and seal -in unit has an operating coil tapped at 0. 2 and 2. 0 amperes. The rel ay is shipped
from the factory with the tap screw in the higher ampere position. The tap screw is the screw hol ding the
right hand stationary contact. To change the tap setting, first remove one screw from the l eft hand
stationary contact and pl ace it in the desired tap. Next remove the screw from the undesired tap and
� l ace it on the l eft hand stationary contact where the first screw was removed. See Figure l . This proce
Jre is necessary to prevent the right hand stationary contact from getting out of adjustment. Screws
shou l d never be l eft in both taps at the same time.
1 1
www . ElectricalPartManuals
. com
www
. ElectricalPartManuals
. com
