GEK-34054
The
i ns ta nta neous
uni t has a conti nuous
r a ti ng of
1. 5
t i me s
mi ni mum s e tti ng or
25
a mpe re s , wh i cheve r i s s malle r .
E xample :
The
2 . 0 -16 . 0 a mpe r e i ns ta ntaneous uni t, when s e t on the low r a ng e ( 2 . 0 -
8. 0
a mpe r e s )
has a
c onti nuous
ra ti ng
of 3. 0
a mpe r e s ,
a nd
whe n
c onne c te d
for
h i g h - r a ng e
ope r a ti on
( 4. 0 - 1 6 . 0
a mpe r e s )
h a s
a
c onti nuous r a ting of 6 . 0 a mpe r e s .
The c onti nuous a nd one-second rating s for the i ns ta ntaneous uni ts
a r e shown i n Table VI I.
TABLE V I I
RANGE
0.5 - 4.0
2.0 - 16.0
10.0 - 80.0
0.5 -
1.0 -
2.0 -
4.0 -
10.0 -
20.0 -
tt
2.0
s
4.0
p
8.0
s
16.0
p
40.0
s
80.0
p
20.0 - 160.0 20.0 -
80.0
40.0 - 160.0
s
p
CONTINUOUS
RATING
0.75
1.5
3.0
6.0
15.0
25.0
25.0
25.0
t ONE
K
SECOND
25.0
625
50.0
2,500
130.0
16,900
260.0
67,600
400.0
160,000
600.0t
360,000
600.0t
360,000
600.0t
360,000
t
Hi ghe r cur r e nts ( I) may be applied for s h or te r
lengths of ti me
( T)
i n accorda nc e wi th the
for mula
l=A
T
tt
S
=
Se r i e s c onne cted, P
=
Pa r a llel c onnec ted
TARGET AND SEAL- I N UNIT
Rati ngs for the ta r g e t/s ea l-i n uni t a r e shown i n Table VI I I .
TABLE VII 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
impedance
(ohms)
50.0
0.65
50
Hz
impedance
42.0
0.54
7
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