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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”.
5.7.6
Signals
Table 717:
21FL Input signals
Name
Type
Default
Description
I_A
SIGNAL
0
Phase A current
I_B
SIGNAL
0
Phase B current
I_C
SIGNAL
0
Phase C current
Io
SIGNAL
0
Residual current
I
1
SIGNAL
0
Positive sequence current
I
2
SIGNAL
0
Negative sequence current
V_A_AB
SIGNAL
0
Phase to ground voltage A or phase to phase voltage AB
V_B_BC
SIGNAL
0
Phase to ground voltage B or phase to phase voltage BC
V_C_CA
SIGNAL
0
Phase to ground voltage C or phase to phase voltage
CA
V
0
SIGNAL
0
Residual voltage
V
1
SIGNAL
0
Positive phase sequence voltage
V
2
SIGNAL
0
Negative phase sequence voltage
BLOCK
BOOLEAN
0=False
Signal for blocking the triggering
TRIGG
BOOLEAN
0=False
Distance calculation triggering signal
TRIGG_XC0F
BOOLEAN
0=False
XC0F calculation triggering signal
Table 718:
21FL Output signals
Name
Type
Description
ALARM
BOOLEAN
Fault location alarm signal
Section 5
1MAC059074-MB A
Protection related functions
826
615 series ANSI
Technical Manual
Содержание Relion 615 series
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