136
6
F
2
S
0
8
3
4
F/F
F/F
F/F
F/F
&
≥
1
SP2
SP1
FT
MSARC1
≥
1
≥
1
FT
MSARC2
SP1
F/F
FT
MSARC3
SP2
5 - 300s
FT
ARC
ARC
SYN-OP
"S2", "S3", "S4"
+
TP
ARC1
ARC1
t
0
STEP COUNTER
MULT.ARC
SP3
SP2
SP1
MSARC1
TS2R
TS2
5 - 300s
t
0
&
≥
1
5 - 300s
t
0
5 - 300s
t
0
5 - 300s
t
0
5 - 300s
t
0
MSARC2
MSARC3
TS4R
MAR-FT
FT2
FT1
TS4
TS3R
TS3
&
SP2
SP1
&
SP3
FT3
&
≥
1
&
≥
1
≥
1
&
&
&
CLR
CLOCK
1
0.1s
0
t
MSARC
≥1
FT
"S3"
"S4"
"S2"
[ARC-SM]
[ARC-SM]
0.5s
303
308
Figure 2.7.2.5 Scheme Logic for Multi-Shot Autoreclose
In low-speed autoreclose, the dead time counter TS2 for the second shot is activated if high-speed
autoreclose is performed (ARC = 1), but tripping occurs again (TP = 1). Second shot autoreclose is
performed only when the voltage and synchronism check element operates (SYN-OP = 1) after a
period of time set on TS2 has elapsed. At this time, outputs of the step counter are: SP1 = 1, SP2 =
0, and SP3 = 0.
Autoreclose is completed at this step if the two-shot mode is selected for the multi-shot mode.
Therefore, the tripping following the "reclose-onto-a-fault" becomes the final tripping (FT1 = 1).
If the voltage and synchronism check element does not operate within the period of time set on the
timer TS2R which is started at the same time as TS2 is started, the multi-shot autoreclose is
cancelled (MAR-FT = 1).
When the three shots mode is selected for the multi-shot mode, autoreclose is further retried after
the above tripping occurs. At this time, the TS3 and TS3R are started. The third shot autoreclose is
performed only when the voltage and synchronism check element operates after the period of time
set on the TS3 has elapsed. At this time, outputs of the step counter are: SP1 = 0, SP2 = 1, and SP3
= 0.
The three shot mode of autoreclose is then completed. Therefore, the tripping following the
"reclose-onto-a-fault" becomes the final tripping (FT2 = 1).
If the voltage and synchronism check element does not function within the period of time set on
the TS3R, multi-shot autoreclose is cancelled.
When four-shot autoreclose is selected, low-speed autoreclose is further retried once again for
tripping that occurs after the "reclose-onto-a-fault". This functions in the same manner as the
three-shot autoreclose.
www
. ElectricalPartManuals
. com
Summary of Contents for GRZ100-211B
Page 323: ... 322 6 F 2 S 0 8 3 4 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Page 343: ... 342 6 F 2 S 0 8 3 4 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Page 383: ... 382 6 F 2 S 0 8 3 4 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Page 395: ... 394 6 F 2 S 0 8 3 4 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Page 411: ... 410 6 F 2 S 0 8 3 4 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Page 423: ... 422 6 F 2 S 0 8 3 4 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Page 443: ... 442 6 F 2 S 0 8 3 4 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Page 451: ... 450 6 F 2 S 0 8 3 4 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Page 459: ... 458 6 F 2 S 0 8 3 4 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Page 463: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...