Definite Time-Delay Trip Curve For Short - ABB PR521 Operator's Manual

Microprocessor based protection unit
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10.5. Curva di intervento a tempo fisso per pro-
tezione di corto circuito con ritardo
regolabile
100
0.01
t [s]
10
1
0.1
0.6
0.8
1
0.7
0.9
10.5. Definite time-delay trip curve for short cir-
cuit protection with adjustable time-delay
Definite Time Curve
7 8
2
3
4
5
6
5.5
I >>
10
20
I/In
9
647008/002 - 2000/05 it-en - 35/40

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