382
APPENDIX
XMR-D
L1 L2 L3
P1
S1
S2
P2
I
L1H
I
L2H
I
L3H
I
E2
P1
S1
S2
P2
U
L1
, U
L2
, U
L3
I
L1H
, I
L2H
, I
L3H
I
L1L
, I
L2L
, I
L3L
I
ECH
I
ECL
74CT
81U
50/51
81O
59
27V1
27
46
49
47
37
87T
59V2
74TCS
BF
26
*
87NHIZ.2
74VT
74CT
P1
S1
S2
P2
I
L1L
I
L2L
I
L3L
A2
A3
A4
A5
A6
50/51
50N/51N(Comp)
50N.2/51N.2
*
87NHIZ.1
64REF
50N/51N(Comp)
50N.1/51N.1
A7
A8
I
E1
P1
S1
S2
P2
U
L1
U
L2
U
L3
A N
B N
C N
n
a
n b
n c
B1
B2
B3
B4
B5
B6
B7
B8
dn da
dn
db
dn
dc
(*)
U
EC
U
E
59N
(*) Antiferrorisonance
Note *: when 87NHIZ is enabled, the
50N/51N/67N functions can not be used with
residual current (IE) measured directly
Differential Protection - 2 Coils Transformer
NOTE
Incoming currents must be connected to relay reference amperometric input terminals; outgoing currents must be connected to protection relay
amperometric output terminals.
Incoming currents in relay reference terminals are considered positive, while the outgoing ones are considered negative.
CONVENTION - CT’s P1 polarity is indicated towards protected component.
Z1
Z2
Z3
Z4
Z5
Z6
Z7
Z8
U
E
A1
XMR-D EQUIPMENT MANUAL
Ed. 2.9 - 02/2021
To Next Page
Loading...
Need help?
General
