OR6
O:70|T:2.5|I:23
B1
B2
B3
B4
B5
B6
O
CBXCBR1_52-1_BLK_CLOSET1PTTR1_49F_BLK_CLOSE
GUID-E9EA0997-1241-47C5-B899-AC7D4E3411B4 V1 EN
Figure 205: Circuit breaker 1 close blocking logic
3.6.3.5 Functional diagrams for measurement functions
The phase current inputs to the relay are measured by the three-phase current
measurement function CMMXU1. The current input is connected to the X120 card in the
back panel. Similarly, the sequence current measurement CSMSQI1 measures the
sequence current and the residual current measurement RESCMMXU1 measures the
residual current.
The three-phase bus side phase voltage and single phase line side phase voltage inputs to
the protection relay can be measured by three-phase voltage measurement VMMXU1 and
VMMXU2. The voltage input is connected to the X130 card in the back panel. The
sequence voltage measurement VSMSQI1 measures the sequence voltage and the
residual voltage measurement RESVMMXU1 measures the residual voltage.
The measurements can be seen from 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.
The frequency measurement FMMXU1 of the power system and the three-phase power
and energy measurement PEMMXU1 are available. Load profile record LDPRLRC1 is
included in the measurements sheet. LDPRLRC1 offers the ability to observe the loading
history of the corresponding feeder.
CMMXU1
O:154|T:5|I:1
BLOCK HIGH_ALARM
HIGH_WARN
LOW_WARN
LOW_ALARM
GUID-DE29661F-BEE7-45D4-A44F-9C8BA6E5FF52 V1 EN
Figure 206: Three-phase current measurement
GUID-A9D709EE-7B3D-43B1-A793-BFE289E02F9E V1 EN
Figure 207: Sequence current measurements
Section 3 1MAC109016-MB C
REF615 standard configurations
158 REF615 ANSI
Application Manual
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