Functional Diagrams For Measurement Functions - ABB relion REF615 Applications Manual

1MRS756378 S
3.12.3.5
REF615
Application Manual
CONTROL_LOCAL
FALSE
CONTROL_REMOTE
FALSE
GUID-3D63AADE-4D5E-47D2-B05F-54245A9157E8 V1 EN
Figure 484: External opening command for circuit breaker

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 current input to high impedance restricted earth fault protection function is
measured by RESCMMXU2.
The three-phase bus side phase voltage and single phase line side phase voltage inputs
to the IED are 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.
The power quality functions CMHAI1 and VMHAI1 can be used to measure the
harmonic contents of the phase current and phase voltages. The voltage variation, that
is, sage and swells can be measured by the voltage variation function PHQVVR1. By
default these power quality functions are not included in the configuration. The
required logic connections can be made depending on the application using PCM600.
GUID-E62D2A19-1203-43F8-BFD7-D422CCC20304 V1 EN
Figure 485: Current measurement: Three-phase current measurement
REF615 standard configurations
AND
B1 O
B2
B1
B2
AND
B1 O
B2
CMMXU1
BLOCK HIGH_ALARM
HIGH_WARN
LOW_WARN
LOW_ALARM
Section 3
OR
O
CBXBCR1_AU_OPEN
315