ABB RELION 615 Series Applications Manual page 81

1MRS758955 A
REV615
Application Manual
RSTP Rapid spanning tree protocol
RTD Resistance temperature detector
RTU Remote terminal unit
SAN Single attached node
Single-line diagram Simplified notation for representing a three-phase
power system. Instead of representing each of three
phases with a separate line or terminal, only one
conductor is represented.
SLD Single-line diagram
SMV Sampled measured values
SNTP Simple Network Time Protocol
SO Signal output
TCS Trip-circuit supervision
VT Voltage transformer
WAN Wide area network
WHMI Web human-machine interface
Section 6
Glossary
75