PLC
Programmable logical controller
PO
Power output, process object
RMS
Root mean square
RTU
Remote terminal unit
SGB
Switchgroup for digital inputs
SGF
Switchgroup for functions
SGL
Switchgroup for LEDs
SGR
Switchgroup for output contacts
SO
Signal output
SP
Second-pulse
SPA
Data communication protocol developed by ABB
TCS
Trip-circuit supervision
UDR
User-defined register
UR
Unsolicited reporting
174
REF610
REF610
Feeder Protection Relay
Technical Reference Manual - ANSI Version
1MRS755535
Summary of Contents for RELION REF610
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