Thytronic NA11

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142
NA11 - Manual - 02 - 2009
APPENDIX
Phase overcurrent 50/51 - Rectifi er curves
F_51-RI-Char.ai
0.01
0.1
1
100
10
1000
10 000
100 000
1000 000
t [s]
1.1
2 3 4 5 6 7 8 9 10 20
I /I >inv
t>
inv
= 60 s
t>
inv
= 10 s
t>
inv
= 5 s
t>
inv
= 1 s
t>
inv
= 0.1 s
t>
inv
= 0.5 s
t>
inv
= 0.02 s
t>
inv
= 0.1 s
t =
t>
inv
·
[(I/I>
inv
)
5.6
-1]
2351
Note: match of operating and setting time takes place when I/I>
inv
= 4