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Mmxn: Analog Measured Values; Protection And Other Logical Nodes - GE B90 UR Series Instruction Manual

Low impedance bus differential system.
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APPENDIX C
A limited number of measured analog values are available through the MMXN logical nodes.
Each MMXN logical node provides data from a B90 current and voltage terminal. There is one MMXN available for each
configurable terminal (programmed in the
data from B90 terminal 1, and MMXN2 provides data from B90 terminal 2.
MMXNx logical nodes provide the following data for each terminal:
MMXN1.MX.Amp: terminal current magnitude and angle
MMXN1.MX.Vol: terminal voltage magnitude and angle
The following list describes the protection elements for all UR-series relays. The B90 relay will contain a subset of protec-
tion elements from this list.
PDIF: bus differential, transformer instantaneous differential, transformer percent differential, current differential
PDIS: phase distance, ground distance
PIOC: phase instantaneous overcurrent, neutral instantaneous overcurrent, ground instantaneous overcurrent, nega-
tive-sequence instantaneous overcurrent.
PTOC: phase time overcurrent, neutral time overcurrent, ground time overcurrent, negative-sequence time overcur-
rent, neutral directional overcurrent, negative-sequence directional overcurrent
PTUV: phase undervoltage, auxiliary undervoltage, third harmonic neutral undervoltage
PTOV: phase overvoltage, neutral overvoltage, auxiliary overvoltage, negative sequence overvoltage
RBRF: breaker failure
RREC: autoreclosure
RPSB: power swing detection
RFLO: fault locator
XCBR: breaker control
XSWI: circuit switch
CSWI: switch controller
The protection elements listed above contain start (pickup) and operate flags. For example, the start flag for PIOC1 is
PIOC1.ST.Str.general. The operate flag for PIOC1 is PIOC1.ST.Op.general. For the B90 protection elements, these flags
take their values from the pickup and operate FlexLogic operands for the corresponding element.
Some protection elements listed above contain directional start values. For example, the directional start value for PDIS1 is
PDIS1.ST.Str.dirGeneral. This value is built from the directional FlexLogic operands for the element.
The RFLO logical node contains the measurement of the distance to fault calculation in kilometers. This value originates in
the fault locator function.
The XCBR logical node is directly associated with the breaker control feature.
XCBR1.ST.Loc: This is the state of the XCBR1 local/remote switch. A setting is provided to assign a FlexLogic operand
to determine the state. When local mode is true, IEC 61850 client commands will be rejected.
XCBR1.ST.Opcnt: This is an operation counter as defined in IEC 61850. Command settings are provided to allow the
counter to be cleared.
XCBR1.ST.Pos: This is the position of the breaker. The breaker control FlexLogic operands are used to determine this
state.
Intermediate state (00) is indicated when the
Off state (01) is indicated when the
On state (10) is indicated when the
GE Multilin

SETTINGS
SYSTEM SETUP
BREAKER 1 OPEN
operand is On.
BREAKER 1 OPEN
operand is On.
BREAKER 1 CLOSED
B90 Low Impedance Bus Differential System
C.2 SERVER DATA ORGANIZATION
C.2.6 MMXN: ANALOG MEASURED VALUES

settings menu). MMXN1 provides
AC INPUTS
C.2.7 PROTECTION AND OTHER LOGICAL NODES
and
BREAKER 1 CLOSED
C
operands are both On.
C-3

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