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
170
REF 610REF 610
Feeder Protection Relay
Technical Reference Manual
1MRS755310
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