Table of Contents
Advertisement
Figure 2.15.2.9 shows the energizing control scheme of the two circuit breakers in the
three-phase autoreclose. OVB and UVB are the overvoltage and undervoltage detectors of
busbar voltage V B in Figure 2.15.2.7. OVL1 and UVL1 are likewise the overvoltage and
undervoltage detectors of line voltage V L1 .
OVL2 and UVL2 are likewise the overvoltage and undervoltage detectors of line voltage V L2 .
V L2 in the center breaker is equivalent to the busbar voltage V B in the busbar breaker.
SYN1 and SYN2 are the synchronism check elements to check synchronization between the two
sides of the busbar and center breakers, respectively. SYN-OP is a voltage and synchronism
check output.
57
OVB
&
58
UVB
&
59
SYN1
60
OVL1
T3PLL
OVL1
78
(3PH)
0.01 - 1s
61
UVL1
&
62
OVL2
&
63
UVL2
64
SYN2
[ARC-CB]
+
1
1
ARC-SET
Note :
is set to "
[ARC-CB]
commands are output only for CB1(bus CB).
Figure 2.15.2.9 Energizing Control Scheme for Two Circuit Breakers
[VCHK]
+
"
OFF
"
LB1
"
LB2
"
DB
"
SYN
TLBD1
&
0.01 - 1s
TDBL1
&
0.01 - 1s
TSYN1
&
0.01 - 10s
498
3PLL
(Three phase live line)
TLBD2
&
0.01 - 1s
TDBL2
&
0.01 - 1s
TSYN2
&
0.01 - 10s
"
"
ONE
"
"
01
"
"
02
"
"
L1
"
"
L2
" only when the relay is applied to one-breaker system. Trip and reclose
ONE
127
"
"
"
"
"
≥1
&
≥1
&
&
≥1
&
&
≥1
6 F 2 S 0 8 5 0
159
≥1
SYN
-OP
Hide quick links:
Advertisement
Table of Contents
