Thytronic Pro-N NVA100X-D - APPENDIX B4 - Connection diagrams; Differential protection of Transformer;generator

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NVA100X-D - Manual - 02 - 2016
APPENDIX
8.8 APPENDIX B4 - Connection diagrams
Note: All diagram must be considered just as example; they cannot be comprehensive for real applications.
For all diagrams the output contacts are shown in de-energized state for standard reference.
NVA100X-D
L1 L2 L3
P1
S1
S2
P2
C2
C1
C3
C4
C5
C6
P1
S1
S2
P2
I
L1H
I
L2H
I
L3H
S1
S2
P2
P1
S1
S2
P2
G
C7
C8
I
E2
P1
S1
S2
P2
U
L1
U
L2
U
L3
AN
BN
CN
n
a
nb
nc
B3
B4
B5
B6
B7
B8
U
L1
, U
L2
, U
L3
I
L1H
, I
L2H
, I
L3H
I
L1L
, I
L2L
, I
L3L
U
E
U
EC
U
E
U
EC
I
ECH
I
ECH
I
ECL
74CT
81U
50/51
81O
59
27V1
27
40
51V
46
49
47
37P
37
21
87G
59V2
74TCS
BF
26
*
64REF
U
EC
U
E
I
ECH
I
ECL
50N/51N(Comp)
50N.1/51N.2
87NHIZ
50N.1/51N.1
59N
67N
67N(Comp)
74VT
74CT
I
L1L
I
L2L
I
L3L
A2
A3
A4
A5
A6
A7
A8
I
E1
B9
B10
dn da
dn
db
dn
dc
(*)
(*) Antiferrorisonance
Differential protection of generator
NOTE
- To current with incoming direction in the protected component must match incoming current in the reference terminals of of the relay current inputs ,
while to current having a outgoing direction from the protected component must match output current in the reference terminals of the current inputs
of the relay.
- The input current in the reference terminals of of the relay current inputs of the are considered positive, negative for outgoing ones.
- This Convention applies: the CTs polarity P1 to the protected component.
Note *: when 87NHIZ is enabled, the 50N/51N/67N functions
can not be used with residual current (IE) measured directly