AND
B1
B2
O
AND
B1
B2
O
OR
B1
B2
O
FALSE
FALSE
CONTROL_LOCAL
CONTROL_REMOTE
CBXCBR1_AU_OPEN
GUID-39E32323-F206-41CB-9140-3C148E75CD09 V2 EN
Figure 112:
External opening command for circuit breaker 1
3.4.3.5
Functional diagram for measurement functions
The phase current inputs to the relay are measured by the three-phase current
measurement function CMMXU1. The three-phase 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 three-phase terminal side voltage inputs to the relay are measured by the three-
phase voltage measurement function VMMXU1. In addition to phase voltage,
terminal side and neutral side residual voltage are measured by residual voltage
measurement RESVMMXU1 and RESVMMXU2. The three-phase voltage input as
well as residual voltages are connected to the X130 card in the back panel. The
sequence voltage measurement VSMSQI1 measures the sequence voltage.
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.
The frequency measurement FMMXU1 of the power system and 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
BLOCK
HIGH_ALARM
HIGH_WARN
LOW_WARN
LOW_ALARM
GUID-808ADD59-F47E-4B78-B3E0-2DC325894287 V2 EN
Figure 113:
Current measurement: Three-phase current measurement
CSMSQI1
GUID-4938BE4F-F61D-4B6E-AC06-C77D5DD06B05 V2 EN
Figure 114:
Current measurement: Sequence current measurement
1MRS758272 B
Section 3
REG615 standard configurations
REG615
91
Application Manual
