Toshiba GRL100-701B Instruction Manual page 75

PSBSZ and PSBGZ have same functions and characteristics as shown in Figures 2.3.3.1 and
2.3.3.2, and block tripping of phase and earth fault elements respectively.
593:PSBSOUT-AB
594:PSBSOUT-BC
595:PSBSOUT-CA
PSBSOUT
596:PSBSIN-AB
597:PSBSIN-BC
598:PSBSIN-CA
PSBSIN
EFL
≥1
PSB_BLOCK
1877
587:PSBGOUT-A
588:PSBGOUT-B
589:PSNGOUT-C
PSBGOUT
590:PSBGIN-A
591:PSBGIN-B
592:PSBGIN-C
PSBGIN
PSB_F.RESET
1987
One- and two-phase faults can be protected with the command protection even during a power
swing.
The PSB can be disabled or reset by the PLC signal PSB_BLOCK or PSB_F.RESET.
&
t
0.02 - 0.06s
T2
t 0
&
0.5s
&
t
0.02 - 0.06s
T2
t 0
&
0.5s
Figure 2.3.3.2 Power Swing Detection Logic
 74 
TPSB
0
S Q
F/F
R
≥1
TPSB
0
S Q
F/F
R
≥1
6 F 2 S 0 8 5 0
765
PSBS_DET
766
PSB_DET
≥1
764
PSBG_DET