ABB Relion 670 series, Техническое руководство

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ANSI09000149-4-en.vsd
AND
AND
AND
Bool to
integer
DLECND
STPG
STPP
IRELPG
IRELPP
BLOCK
AND
0
20ms
0
10ms
0
15ms
0
15ms
0
3 I IMinPUPG

0 max
3 0 _
3
100
I BLK PP
I Iph
 
0
3 0.5 I IMinPUPG
 
0
3 0 _
3
100
max
I Enable PG
I Iph
 
21 enable
LDEblock
AND
ANSI09000149 V4 EN-US
Figure 142: Phase-to-phase and phase-to-ground operating conditions (residual current
criteria)
A special attention is paid to correct phase selection at evolving faults. A PHSEL output signal is
created as a combination of the load encroachment characteristic and current criteria, refer to
figure 142 . This signal can be configured to STCND functional input signals of the distance
protection zone and this way influence the operation of the phase-to-phase and phase-to-ground
zone measuring elements and their phase related pickup and tripping signals.
Figure 143 presents schematically the composition of non-directional phase selective signals
NDIR_A (B or C). Internal signals ZMn and ZMmn (m and n change between A, B and C according to
the phase) represent the fulfilled operating criteria for each separate loop measuring element,
that is within the characteristic.
Section 7 1MRK 502 066-UUS B
Impedance protection
286
Technical manual