ABB Relion 630 Series Commissioning Manual page 46

Section 6
Glossary
38
PC Personal computer; Polycarbonate
PCM600 Protection and Control IED Manager
RJ-45 Galvanic connector type
RMS Root-mean-square (value)
Rx Receive/Received
SAT Site acceptance testing
SOTF Switch on to fault
TCP/IP Transmission Control Protocol/Internet Protocol
TCS Trip-circuit supervision
Tx Transmit/Transmitted
VT Voltage transformer
WAN Wide area network
WEI Weak-end infeed logic
1MRS756801 A
630 series
Commissioning Manual