ABB REX 521 Technical Reference Manual, Standard Configurations page 202

REX 521
202
Protection Relay
Technical Reference Manual, Standard Configurations
= energy counter, forward or reverse active / reactive energy
E
= measuring circuit supervision
MCS
= trip circuit supervision
TCS
= circuit-breaker condition monitoring
CBCM
= active power measurement, indication and supervision
P
= reactive power measurement, indication and supervision
Q
= 3-phase current measurement, indication and supervision
3I
= 3-phase voltage or phase-to-phase voltage measurement, indication
3U
and supervision
= frequency measurement, indication and supervision
f
= power factor measurement, indication and supervision
pf
= residual current measurement, indication and supervision
I
0
U
= residual voltage measurement, indication and supervision
0
1MRS 751802-MUM
SYMNOTREX2