Siemens 7 SK 88 A Series Installation And Maintenance Instructions Manual page 15

3
4·
5 . - - -....
6'
2----~
relay
input
C.T.
1 __ --------~
4/2215
Test current injection
Response time
measurement
y
b
- 14 -
br
g
plugs'
Fig.
9: Diagrammatic representation of effect of inserted
test plug
7XV8~10
300
100
50
30
10
5
3
': i- -
...
~~
- 1 I __
. :'-1: L
n
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.-
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j-f'I:--:
-
.
,~ ...
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10
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'
-1 1
:- i -
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I
10
100
Imox/5~
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;...
.
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l
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.
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-: 7
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I
~
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I
-r
t,
I
1
I
4-10
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+~
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1
T~
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..
i:
1,
1000
I
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Fig. 10: Thermal withstand of current circuit
1SK88