Thytronic NA10 User Manual

APPENDIX
135
NA10 - Manual - 04 - 2022
 Phase overcurrent 50/51 - Electromechanical inverse curves (EM)
F_51-EM-Char.ai
1.1
2 3 4 5 6 7 8 9 10 20
I
/I>inv
0.01
0.1
1
10
100
1000
10000
t [s]
t>
inv
=
60 s
t>
inv
=
10 s
t>
inv
=
5 s
t>
inv
=
1 s
t>
inv
=
0.5 s
t>
inv
=
0.2 s
t>
inv
= 0.1 s
t>
inv
= 0.02 s
t =
t>
inv
·
[-0.236 · (I/I>
inv
)
-1
+ 0.339]
0.28
Note: match of operating and setting time takes place when I/I>
inv
= 4

Thytronic NA10 Specifications

General

Brand	Thytronic
Model	NA10
Category	Relays
Language	English