CTCT
Combi
Sensor
Merging
Unit
Merging
Unit
Ethernet Switch
Combi
Sensor
Conventional VT
IEC/UCA 61850-9-2LE
IEC/UCA 61850-9-2LE
IEC/UCA 61850-9-2LE
Splitter
Electrical-to-
Optical Converter
1PPS
1PPS
1PPS
110 V 1 A
Station Wide
GPS Clock
IEC080000723enOriginal.vsd
Preprocessing blocks
SMAI
Application
MU1 MU2
1 A
TRM module
Preprocessing blocks
SMAI
IED
Access Point
IEC08000072 V3 EN-US
Figure 261: Example of signal path for sampled analogue values from MU and
conventional CT/VT
The function has the following alarm signals:
• MUDATA:
• Ok[0] indicates that the merging unit samples are received from the
merging unit and are accepted.
• ERROR[1] indicates that the merging unit samples are generated by
internal substitution.
• SYNCH:
• OK[0] indicates
1MRK 505 384-UEN A Section 14
Station communication
Breaker protection REQ650 2.2 IEC 555
Technical manual
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