ABB Relion 615 Series Operation Manual page 160

Section 9
Glossary
152
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
SMT Signal Matrix tool in PCM600
SNTP Simple Network Time Protocol
ST Connector type for glass fiber cable
STP Shielded twisted-pair
Subnet mask A set of four numbers used to create IP address numbers
that are used only within a particular network, subnet
SVG Scalable vector graphics
SW Software
TCP Transmission Control Protocol
TCP/IP Transmission Control Protocol/Internet Protocol
Tx Transmit/Transmitted
UDP User datagram protocol
UL Underwriters Laboratories
UTC Coordinated universal time
VT Voltage transformer
WAN Wide area network
WHMI Web human-machine interface
1MAC054853-MB B
615 series ANSI
Operation Manual