Target And Seal-In Unit - GE IAC Series Instruction Booklet

Time overcurrent relay
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The
instantaneous
minimum s etting or 25 ampe r es,
2. 0-16. 0 ampe r e instantaneous unit,
8. 0
ampe r es)
has
connect e d
fo r
continuous r a ting of 6. 0 ampe r es.
The continuous and one-second ratings fo r the instantaneous units
a r e s hown in Table V I I.
RANGE
0.5 - 4.0
2.0 - 16.0
10.0 - 80.0
20.0 - 160.0
t
High e r cur r ents
lengths
fo rmula
tt S
Se ries connected, P
=
TARGET AND SEAL- IN UNIT
Ratings for the ta rget/s eal-in unit a r e s hown in Tab l e V I I I.
D.C. resistance
Minimum operating
Carry continuously
Carry 30 amps for
Carry 10 amps for
60 Hz imped ance
50 Hz impedance
GEK-34054
unit
has
whicheve r is smaller.
a
continuous
high - r ange
ope r a tion
TABLE V I I
CONTINUOUS
tt
s
0.5 -
2.0
p
1.0 -
4.0
s
2.0 -
8.0
p
4.0 -
16.0
s
10.0 -
40.0
p
20.0 -
80.0
s
20.0
80.0
-
p
40.0 - 160.0
( I) may be applied fo r s ho r te r
of
t ime
( T)
l=A
TABLE V I I I
±
10%
a
continuous
r ating
when s et on the low
rating
of
3. 0
( 4 . 0-16. 0
t ONE
RATING
SECOND
0.75
25.0
1.5
50.0
130.0
3.0
260.0
6.0
400.0
15.0
25.0
600.0t
600.0t
25.0
25.0
600.0t
in
acco r dance
T
Pa r a lle l connected
=
0.2
(ohms)
8.3
(amperes)
0.2
(amperes)
0.37
(seconds)
0.05
(seconds)
0.45
(ohms)
50.b
42.0
7
1.5
of
times
Example:
r ange
( 2.0-
ampe r es,
and
wh en
ampe r e s )
has
K
625
2, 500
16, 900
67, 600
160, 000
360, 000
360, 000
360, 000
with
the
TAP
2.0
0.24
2.0
2.3
2.2
20.0
0.65
0.54
The
a

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