Functional Diagrams For Measurement Functions - ABB relion REF615 Applications Manual

Section 3
REF615 standard configurations
3.10.3.5
250

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 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.
GUID-58044A48-84FA-4E5E-9CEF-962184380C35 V1 EN
Figure 367: Current measurement: Three-phase current measurement
GUID-6F4AF6B3-2DBD-4BF8-8915-4226EA3FF1F8 V1 EN
Figure 368: Current measurement: Sequence current measurement
GUID-119FD230-A037-434D-8A86-375BE112675E V1 EN
Figure 369: Current measurement: Residual current measurement
GUID-A0A7875D-7234-4435-A673-0878D1176605 V1 EN
Figure 370: Voltage measurement: Three-phase voltage measurement
CMMXU1
BLOCK HIGH_ALARM
HIGH_WARN
LOW_WARN
LOW_ALARM
CSMSQI1
RESCMMXU1
BLOCK HIGH_ALARM
HIGH_WARN
VMMXU1
BLOCK HIGH_ALARM
HIGH_WARN
LOW_WARN
LOW_ALARM
1MRS756378 S
REF615
Application Manual