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3.6.3.5
Functional diagrams for measurement functions
The phase current inputs to the IED are measured by the three-phase current
measurement function CMMXU1. The current input is connected to the X120 card in
the back panel. The sequence current measurement CSMSQI1 measures the sequence
current and the residual current measurement RESCMMXU1 measures the residual
current.
The measurements can be seen in the LHMI and they are available under the
measurement option in the menu selection. Based on the settings, function blocks can
generate low alarm or warning and high alarm or warning signals for the measured
current values.
Load profile record LDPRLRC1 is included in the measurements sheet. LDPRLRC1
offers the ability to observe the loading history of the corresponding feeder.
CMMXU1
BLOCK
HIGH_ALARM
HIGH_WARN
LOW_WARN
LOW_ALARM
GUID-05BA9BEE-064A-4C7C-B486-F82231CB43CF V1 EN
Figure 157:
Current measurement: Three-phase current measurement
CSMSQI1
GUID-7F0D54B4-B973-4A6D-A6F8-AAB376A1351F V1 EN
Figure 158:
Current measurement: Sequence current measurement
RESCMMXU1
BLOCK
HIGH_ALARM
HIGH_WARN
GUID-DB3CEBE7-820F-4F79-964A-D63B89AD2233 V1 EN
Figure 159:
Current measurement: Residual current measurement
FLTRFRC1
BLOCK
CB_CLRD
GUID-ABC2FDF0-5586-4463-B1C1-3C7C8300B65A V2 EN
Figure 160:
Other measurement: Data monitoring
LDPRLRC1
RSTMEM
MEM_WARN
MEM_ALARM
GUID-16FAB2AA-E0CF-4904-AD60-A9951BBB3CAC V2 EN
Figure 161:
Other measurement: Load profile record
Section 3
1MRS756378 S
REF615 standard configurations
132
REF615
Application Manual
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