ABB SPAJ 142 C - Page 57

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Fig. 8. RXIDG-type inverse-time characteristics of the overcurrent and earth-fault unit SPCJ 4D29.
0.6
0.7
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0.9
1.0
k
1
2 3 5 7 8 9 10 20
I/I>
6
0.02
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1
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70
t/s
30 40
6
9
0.05
4
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0.3