Thytronic NA011, Manual

Page: 87 / 95

APPENDIX
87 NA011 - Manual - 05 - 2022
F_51N-I2t-Char.ai
1.1
2 3 4 5 6 7 8 9 10
20
0.01
0.1
1
10
100
1000
10000
t [s]
t
E
>
inv
= 1 s
t
E
>>
inv
= 1 s
t
E
>
inv
= 0.5 s
t
E
>>
inv
= 0.5 s
t
E
>
inv
= 0.2 s
t
E
>>
inv
= 0.2 s
t
E
>
inv
= 0.1 s
t
E
>>
inv
= 0.1 s
t
E
>
inv
= 0.02 s
t
E
>>
inv
= 0.02 s
·
[( I
E
/ I
E
>
inv
)
2
]
16
Note: match of operating and setting time takes place when I
E
/I
E
>
inv
or I
E
/I
E
>>
inv
= 4
I
E
/ I
E
>inv
I
E
/ I
E
>>inv
10 s
60 s
t
E
>
inv
t
E
>>
inv
5 s
t = t
E
>
inv
·
[( I
E
/ I
E
>>
inv
)
2
]
16
t = t
E
>>
inv
‡ Residual overcurrent 50N/51N - I
2
t inverse curves (I2t=K)