GE IFC66A Instructions Manual page 11

Hi-Seismic
Instantaneous
Unit (Amps)
2 - 50
6 - 150
*The range is approximate, which means that the 2-10, 10-50 may be 2-8, 8-50.
one ampere overlap between the maximum L setting and the minimum H setting.
select the higher range, since it has the higher continuous rating.
**Higher currents may be applied for shorter lengths of time in accordance with the formula:
HI-SEISMIC HIGH DROPOUT INSTANTANEOUS UNIT
The high drooout instantaneous unit is tapped for operation on either of two ranges (H or L) .
of the high or low range is accomplished by means of a movable lead located in the rear of the relay.
Unit Tap
Position
L
2 - 8
H
*The range is approximate which means that the 2-4 , 4-8 may be 2-5, 4-8.
ampere overlap between the maximum
range, since it has the higher continuous rating.
**Higher currents may be applied for shorter lengths of time in accordance with the formula:
Since the high dropout unit coil is in series with the time overcurrent unit coil and the Hi-Seismic
instanta�eous unit coil, see Tables 3, 4, 5 and 6 to determine the current limiting element for both
continuous
and short time ratings.
MlO
HI-SEISMIC
TARGET
Ratings for the target and seal-in unit are shown in Table 7.
ind�cates revision
*
-----
---- ·-
--
*
Link
Range
Position
(Amps)
L
2 - 10
H
10 - 50
L
6 - 30
H
30 - 180
*Range
Continuous
Rating
(Amps)
2 - 4 3. 7
4 - 8
4. 8
L
setting and the minimum H setting.
SEAL-IN UNIT
G!:K-45376
TABLE 5
**One
Continuo us )
Second
Rat in
Rat in
(Amps
(Amps
3.7
130
7.5
10.2
260
19.6
f
I K / T
=
TABLE 6
**One
Second
Ratin
J
(Amps
130
16900
r'KiT
I
=
6
}
K
16,900
67,600
There will always be at least
Whenever possible, always
K
There will always be at least one
Whenever possible select the higher
Selection