Thytronic NA30

APPENDIX
191
NA30 - Manual - 04 - 2022
Three phase CTs and residual current from common return of phase CTs (Holmgreen)
Raf (*)
da
dn
N
A
U
E
(**) Operation for 67N elements for insulated neutral systems and characteristic angle setting = 90°
NA30-SCH4.ai
BUSBAR
LINE
OPERATION (**)
NA30
L1
L2
L3
B7
B8
C1
C2
C3
C4
C5
C6
P1
S1
S2
P2
I
L1
I
L2
I
L3
I
E
C7
C8
* Raf - antiferrorisonance resistor
59N
50N/51N
49
50/51
74CT
67N
BINARY INPUTS
50BF
CB position