Siemens 7XV5654-0BA00 Directions For Use Manual page 50

English
Synchronizing of maximum 6 differential protection relays 7SD52
With the GPS-Receiver 7XV5664-0AA00 and the 2-channel Sync.-Transceiver in a
substation up to 6 SIPROTEC 4 differential protection devices 7SD52 can be
synchronized with high accuracy. For the GPS-synchronization of the differential
topology in each substation, where differential relays are located, a GPS-Receiver must
be mounted.
Output A of the GPS-Receiver send an IRIG-B telegram and output B a high precision
second pulse. The accuracy of the second pulse is 1 us. This pulse is given out exact at
the same moment from each receiver, so the differential relays get an absolute time tag
at each substation. With the absolute time in each relay the transmission time of receive
and transmit path of the data connection between the relays can be measured exactly.
So different transmission times in receive and transmit path can be calculated with the
exact value by each relay. The time telegram is used to set the internal clock in the
relays, but is not used by the differential protection algorithm.
Substation 1
GPS-antenna
RS232 GPS
GPS-Receiver
7XV5664-0AA00
A B
DCF-SIM
FO1 FO2 IRIG-B
A= IRIG-B telegramm
B= periodic second pulse
FO1 FO2 BI2
R1 R2
7XV5654 Sync-Trans.
X1
24V
- -
+ +
1 3 8 4
Y-cable 7XV5105-0AAxx
1 3 8 4
V4
SIPROTEC
SIEMENS
RUN ERROR
L1 402,1A Max450.1A
L2 402,1A Max450.1A
L3 402,1A Max450.1A
E 00.0A
7SD52
Anr. L1
Anr. L2
Anr. L3
Anr. Erde
Automat
1
Fig. 6: Synchronizing of maximum 6 differential protection relays 7SD52
in two substations
50 / 69
U
H
Power-
supply
24V
K2
1 3 8 4
V4
SIPROTEC
SIEMENS
RUN ERROR
L1 402,1A Max450.1A
L2 402,1A Max450.1A
L3 402,1A Max450.1A
E 00.0A
Anr. L1
Anr. L2
Anr. L3
Anr. Erde
Automat
6
to max.
Substation 2
GPS-antenna
RS232 GPS
GPS-Receiver
7XV5664-0AA00
A B
DCF-SIM
FO1 FO2 IRIG-B
A= IRIG-B telegram
B= periodic second-pulse
FO1 FO2 BI2
R1 R2
7XV5654 Sync-Trans.
X1
K2
24V
- -
+ +
1 3 8 4
Y-cable 7XV5105-0AAxx
1 3 8 4
V4
SIPROTEC
SIEMENS
RUN ERROR
L1 402,1A Max450.1A
L2 402,1A Max450.1A
L3 402,1A Max450.1A
E 00.0A
7SD52
Anr. L1
Anr. L2
Anr. L3
Anr. Erde
Automat
1
to max.
C53000-B1175-C168-1
7XV5654-0BA00
U
H
Power-
supply
24V
1 3 8 4
V4
SIPROTEC
SIEMENS
RUN ERROR
L1 402,1A Max450.1A
L2 402,1A Max450.1A
L3 402,1A Max450.1A
E 00.0A
Anr. L1
Anr. L2
Anr. L3
Anr. Erde
Automat
6