GEK-34054
The one- second the rma l ratings are li s ted in Table I I I .
TABLE III
TIME OVERCURRENT UNIT
1-SEC RATING
K
-{AMPS)
{AMPS)
0.5 -
4.0
140.0
19,600
1.5 - 12.0
260.0
67,600
2.0 - 15.0
260.0
67,600
For r a ting s of le s s than one second, the rating may be c a lc ula te d
accord i ng t o the for mula
I=�
T
whe r e
T
is the time i n seconds tha t the cur r ent flows .
The c on tinu ous cur r e nt ra tings of the time-overcurre n t units a re
s hown i n Tables I V, V and VI.
0.5 - 4.0
AMP RANGE
TAP
0.5
0.6
0.7
0.8
RATING
4.0
4.5
5.5
5.5
1.5 - 12.0
AMP RANGE
TAP
1.5 2.0
2.5
3.0
RATING
10.0 11.5 13.0 14.5
2.0
-
16.0
AMP RANGE
TAP
2.0 2.5
3.0
4.0
RATING
10.0 12.0 13.0 15.0
INSTANTANEOUS UNIT
TABLE I V
1.0
1.2
1.5
2.0
6.0
7.0
7.5
9.0
TABLE V
4.0
5.0
6.0
7.0
17.0 19.0 21.0 23.0
TABLE VI
5.0
6.0
7.0
8.0
16.0
18.0
20.0 20.0
2.5
3.0
4.0
10.0 11.0 13.0
8.0
10.0
12.0
23.5
27.5
30.5
10.0 12.0
16.0
20.0 20.0
20.0
The i ns tantaneous unit has a double-wound c oil for opera tion on
e ither one of two r a nges.
Any setting obta ined in the l ower ra nge
( s e r i e s c on necte d ) i s doubled, with i n
±3% ,
when the unit is c onnected
for hig h - ra ng e ope r ati on (pa rallel c onnecte d ) .
6
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