Signals - ABB 615 series Technical Manual

Section 5
Protection related functions
5.7.6
826
The triggering of 21FL can also be inhibited during the autoreclosing sequence. This is
achieved by connecting the inverted READY signal from the autoreclosing function 79,
which indicates that the autoreclosing sequence is in progress, to the BLOCK input of
21FL. Blocking of the 21FL triggering is suggested during the autoreclosing sequence
when the load compensation or steady-state asymmetry elimination is based on the delta
quantities. This applies to the short circuit faults when Load Com PP loops is set to
"Enabled" or, for ground faults, when EF algorithm Sel is set to "Load compensation" or
"Load modelling".

Signals

Table 717: 21FL Input signals
Name Type
I_A SIGNAL
I_B SIGNAL
I_C SIGNAL
Io SIGNAL
I SIGNAL
1
I SIGNAL
2
V_A_AB SIGNAL
V_B_BC SIGNAL
V_C_CA SIGNAL
V SIGNAL
0
V SIGNAL
1
V SIGNAL
2
BLOCK BOOLEAN
TRIGG BOOLEAN
TRIGG_XC0F BOOLEAN
Table 718: 21FL Output signals
Name Type
ALARM BOOLEAN
Default Description
0 Phase A current
0 Phase B current
0 Phase C current
0 Residual current
0 Positive sequence current
0 Negative sequence current
0 Phase to ground voltage A or phase to phase voltage AB
0 Phase to ground voltage B or phase to phase voltage BC
0 Phase to ground voltage C or phase to phase voltage
CA
0 Residual voltage
0 Positive phase sequence voltage
0 Negative phase sequence voltage
0=False Signal for blocking the triggering
0=False Distance calculation triggering signal
0=False XC0F calculation triggering signal
Description
Fault location alarm signal
1MAC059074-MB A
615 series ANSI
Technical Manual