ABB REX 521 Technical Reference Manual, General

1MRS 751108-MUM
REX 521
7
Protection Relay
Technical Reference Manual, General
1.4. Abbreviations
1.5. Related documents
Manuals for REX 521
Parameter and event lists for REX 521
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
• Technical Reference Manual, Standard Configurations 1MRS751802-MUM
• Operator’s Manual 1MRS 751107-MUM
• Installation Manual 1MRS 750526-MUM
• Technical Descriptions of Functions (CD-ROM) 1MRS750889-MCD
• Modbus Remote Communication Protocol for REX 521,
Technical Description 1MRS755017
• DNP 3.0 Remote Communication Protocol for REF 54_
and REX 521, Technical Description
1MRS755260
• Parameter List for REX 521 1MRS751999-RTI
• Event List for REX 521 1MRS752000-RTI
• General Parameters for REX 521 1MRS752156-RTI
• Interoperability List for REX 521 1MRS752157-RTI

ABB REX 521 Specifications

General

Brand	ABB
Model	REX 521
Category	Other
Language	English