"R"
RECR and RECL
*Two Answers
Recloser and Reclosing
ROBB
Racked-Out Breaker Blocks
TCS
Telecommunications System
TB
Tie Breaker
RT
Red Tag
RECPT
Receptacle
Reactive Kilovolt-Ampere
KVAR
TPG
Temporary Protective Grounds
Transfer Bus
TFR BUS
REL
Regulator, Regulate, Regulation
REG
Reactive Kilovolt-Ampere-Hour
KVARH
TP, TPDT, TPST
Transfer
TRF
Remote Terminal Unit
RTU
Rectifier
RECT
Reactive Megavolt-Ampere
MVAR
T.O.
Throwover
Trip Coil and Trip Cut Off
*2 Answers
TC and TCO
RJR
Remote Jumper Receptacle
RSD
Request for Shut Down
Reactive Volt-Ampere
VAR
TRK
Trunk
TRSD
Trouble Request for Shutdown
Single and Three Phase
*Two Answers
S (with phase symbols) and 3 (with phase symbols)