Abbreviations; Related Documents - ABB REX 521 Technical Reference Manual, General

1MRS 751108-MUM
1.4.
1.5.
Protection Relay
Technical Reference Manual, General

Abbreviations

ASCII American Standard Code for Information Interchange
CRC Cyclic Redundancy Check
CT Current transformer
DI Digital Input
HMI Human-machine interface
HSPO High-speed power output
IRF Internal relay fault
LCD Liquid crystal display
MMI Man-machine interface
NC Normally closed
NO Normally open
PO Power output
RS Rogowski sensor
RTC Real-time clock
RTU Remote Terminal Unit
SA Substation automation
SO Signalling output
TCS Trip-circuit supervision
VD Voltage divider
VT Voltage transformer

Related documents

Manuals for REX 521
• Technical Reference Manual, Standard Configurations
• Operator's Manual
• Installation Manual
• Technical Descriptions of Functions (CD-ROM)
• Modbus Remote Communication Protocol for REX 521,
Technical Description
• DNP 3.0 Remote Communication Protocol for REF 54_
and REX 521, Technical Description
Parameter and event lists for REX 521
• Parameter List for REX 521
• Event List for REX 521
• General Parameters for REX 521
• Interoperability List for REX 521
REX 521
1MRS751802-MUM
1MRS 751107-MUM
1MRS 750526-MUM
1MRS750889-MCD
1MRS755017
1MRS755260
1MRS751999-RTI
1MRS752000-RTI
1MRS752156-RTI
1MRS752157-RTI
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