ABB REF 543 - Page 66

Feeder Terminal REF 541, REF 543, REF 545.
1MRS750443-MBG
66
Fig. 19 Symbol notations, part II
SYMNOT2
2
51NC
DI>
3
= three-phase start-up supervision for motors
= three-phase thermal overload protection for devices
= current unbalance protection for shunt capacitor banks
= phase-sequence voltage protection, stages 1 and 2 available
= three-phase overload protection for shunt capacitor banks
I
s
t
, n<
48, 14, 16
49
U
U
1
,<U
2
>
,>
1
27, 47, 59
3I>, 3I<
51C,37C,
68C
3I >
&
MCS
TCS
CBCM
U
90V
U
Q
P
3I
3U
I
0
f
pf
U
0
= arc protection
= measuring circuit supervision
= trip circuit supervision
= circuit-breaker condition monitoring
= automatic voltage regulation
= manual voltage regulation
= active power measurement, indication and supervision
= reactive power measurement, indication and supervision
= 3-phase current measurement, indication and supervision
= 3-phase voltage or phase-to-phase voltage measurement, indication
and supervision
= frequency measurement, indication and supervision
= power factor measurement, indication and supervision
= residual current measurement, indication and supervision
= residual voltage measurement, indication and supervision