Micom P634 - Acquisition of the Differential and Restraining Currents

●
The maximum phase currents for each end of the transformer
●
The residual current calculated from the phase currents
●
The current measured by the P634 at transformer -Tx4 (x: 1, 2 or 3) The
fault currents are displayed as per-unit quantities referred to I
nom
.
64Z5057A
FT_DA:
Fault curr.IP,a p.u.
[ 025 086 ]
FT_DA:
Fault curr.IN,a p.u.
[ 025 087 ]
FT_DA:
Fault curr.IP,b p.u.
[ 026 086 ]
FT_DA:
Fault curr.IN,b p.u.
[ 026 087 ]
FT_DA:
Fault curr.IP,c p.u.
[ 027 086 ]
FT_DA:
Fault curr.IN,c p.u.
[ 027 087 ]
FT_DA:
Fault curr.IP,d p.u.
[ 028 086 ]
FT_DA:
Fault curr.IN,d p.u
[ 028 087 ]
FT_DA:
Fault curr.IY,a p.u.
[ 025 088 ]
FT_DA:
Fault curr.IY,b p.u.
[ 026 088 ]
FT_DA:
Fault curr.IY,c p.u.
[ 027 088 ]
IA,a
FT_RC:
Record. in progress
[ 035 000 ]
FT_DA:
Save measured values
305 052
IB,a
IC,a
IA,b
IB,b
IC,b
IA,c
IB,c
IC,c
IA,d
IB,d
IC,d
IY,a
IY,b
IY,c
ΣIP,a
ΣIP,b
ΣIP,c
MAIN:
General reset USER
[ 003 002 ]
1: execute
MAIN:
Reset LED
306 020
Imax,a
Imax,b
Imax,c
Active measur. loop
Fig. 3-79: Acquisition of the fault currents
3.19.4 Acquisition of the Differential and Restraining Currents
The P634 stores the differential and restraining current data determined at the
acquisition time by the differential protection and ground differential protection
functions. Moreover, the values for the second and fifth harmonics of the
differential current are stored.
3 Operation
P634
P634/EN M/R-42-A // P634‑311‑653 3-115