Micom P634 - Amplitude Matching

REF_1:
Bl.f.DIFF trigg. PSx
[ * ]
0
0: No
1
REF_1:
Ready
[ 019 054 ]
DIFF:
Meas.system 1 trigg.
[ 041 124 ]
DIFF:
Meas.system 2 trigg.
[ 041 125 ]
DIFF:
Meas.system 3 trigg.
[ 041 126 ]
REF_1:
Blocking EXT
[ 019 051 ]
REF_1:
Enabled
[ 041 132 ]
PSU:
PS y active
[ ** ]
64Z5300C
REF_1:
General enable USER
[ 019 050 ]
0
0: No
1
REF_1:
Enable PSx
[ * ]
0
0: No
1
REF_1:
Enable PSx
072 141
073 141
074 141
075 141
REF_1:
Bl.f.DIFF trigg. PSx
080 006
081 006
082 006
083 006
Parameter
set 1
set 2
set 3
set 3
PSU:
PS y active
036 090
036 091
036 092
036 093
y
1
2
3
4
1: Yes
** *
≥1
≥1
1: Yes
1: Yes
Fig. 3-99: Enabling, disabling and readiness of ground differential protection
3.22.3 Amplitude Matching
For amplitude matching, the nominal power of the transformer end should first
be set as the reference power. The reference current is then calculated by the
P634 on the basis of the set reference power and the set primary nominal
voltage of the transformer end.
I
ref ,N,a
=
S
ref
3 ⋅ V
nom,a
S
ref
: reference power
I
ref ,N,a
: reference current of the ground differential protection function, end a
V
nom,a
: nominal voltage, end a
The P634 calculates the matching factors on the basis of the reference currents
and the set primary nominal currents of the system transformers.
P634
3 Operation
3-142 P634/EN M/R-42-A // P634‑311‑653