Schweitzer Engineering SEL-351P - Appendix I: Mirrored Bits

Date Code 991201 Table of Contents iii
SEL-351P Manual Técnico
Overview......................................................................................................................................H-1
Configuration...............................................................................................................................
H-1
Data-Link Operation....................................................................................................................
H-2
Data Access Method....................................................................................................................
H-2
Device Profile ..............................................................................................................................
H-3
Object Table ................................................................................................................................
H-5
Data Map .....................................................................................................................................
H-9
Relay Summary Event Data...............................................................................................
H-12
Point Remapping........................................................................................................................
H-13
APPENDIX I: M IRRORED B ITS ™ ................................................................I-1
Overview........................................................................................................................................I-1
Operation .......................................................................................................................................
I-1
Message Transmission...........................................................................................................
I-1
Message Decoding and Integrity Checks...............................................................................
I-1
Synchronization .....................................................................................................................
I-2
Loop-Back Testing.................................................................................................................
I-3
Channel Monitoring...............................................................................................................
I-3
M
IRRORED B ITS ™ Protocol for the Pulsar 9600 Baud Modem....................................................I-3
Settings ..........................................................................................................................................
I-4
TABLES
Table G.1: SEL OGIC Control Equation Operators (listed in processing order).......................................G-3
Table G.2: Processing Order of Relay Elements and Logic (top to bottom).........................................
G-11
Table H.1: Data Access Methods ............................................................................................................
H-2
Table H.2: SEL-351P DNP Object Table................................................................................................
H-5
Table H.3: SEL-351P DNP Data Map.....................................................................................................
H-9
FIGURES
Figure F.1: Minimum Response Time Added to a Negative-Sequence Time-Overcurrent Element
51QT ..............................................................................................................................
F-2
Figure F.2: Distribution Feeder Protective Devices ..................................................................................
F-4
Figure F.3: Traditional Phase Coordination ..............................................................................................
F-4
Figure F.4: Phase-to-Phase Fault Coordination.........................................................................................
F-5
Figure F.5: Negative-Sequence Overcurrent Element Derived from “Equivalent” Phase
Overcurrent Element, 51EP ...........................................................................................
F-6
Figure G.1: Result of Rising Edge Operators on Individual Elements in Setting ER ..............................
G-6
Figure G.2: Result of Falling Edge Operator on a Deasserting Underfrequency Element.......................
G-7