Functional Diagrams For Measurement Functions - ABB RELION 615 Series Applications Manual

1MRS758955 A
3.3.3.5
REV615
Application Manual
CONTROL_LOCAL
FALSE
CONTROL_REMOTE
FALSE
GUID-E4861647-EF79-432A-B3B7-344BE9086611 V1 EN
Figure 46: External opening command for circuit breaker

Functional diagrams for measurement functions

The phase current inputs to the protection relay 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.
Three-phase capacitor unbalance current measurement is available in CUBPTOC
protection function.
The three-phase capacitor phase voltage inputs to the protection relay are measured by
three-phase voltage measurement VMMXU1. 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. It is also possible to measure capacitor unbalance voltage by the
residual voltage measurement RESVMMXU2.
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. The load profile function
LDPRLRC1 is included in the measurements sheet. LDPRLRC1 offers the ability to
observe the loading history of the corresponding feeder.
Current total demand distortion CMHAI1 and voltage total harmonic distortion
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 voltage
variation PHQVVR1. By default these power quality functions are not included in the
configuration. Depending on the application, the needed logic connections can be
made by PCM600.
GUID-7D33AD69-87B7-4875-B6C5-BCD11765D01E V1 EN
Figure 47: Current measurement: Three-phase current measurement
REV615 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
53