7/24/2019 Schema releu NA30
1/1193NA 30 - Manuae - 01 - 2011APPENDIX
Two phase CTs and residual current from core balanced CT
Raf (*)
da
dn
N
A
UE
(**) Operation for 67N elements for insulated neutral systems and characteristic angle setting = 90
NA30-SCH2.ai
BUSBAR
LINE
OPERATION(
**)
NA30
L1
L2L3
B7
B8
IE
C7
C8
P1
S1
S2
P2
*Raf - antiferrorisonance resistor
59N
50N/51N
49
50/51
74CT
67N
BINARYINPUTS
50BF
CB position
C2
C1
C3
C4
C5
C6
P1
S1
S2
P2
IL1
IL2
IL3
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