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