Toshiba GRL100-701B Instruction Manual page 119

Voltage Mode
Busbar voltage (V B )
Line voltage (V L )
The synchronism check is performed for voltage mode 1 while the voltage check is performed
for voltage modes 2 and 3.
57
OVB
58
UVB
60
OVL1
OVL1
78
(3PH)
61
UVL1
59
SYN1
Figure 2.15.2.3 Energizing Control Scheme
Figure 2.15.2.3 shows the energizing control scheme. The voltage and synchronism check
output signal SYN-OP is generated when the following conditions have been established:
• Synchronism check element SYN1 operates and on-delay timer TSYN1 is picked up.
• Busbar overvoltage detector OVB and line undervoltage detector UVL1 operate, and
on-delay timer TLBD1 is picked up. (This detects the live bus and dead line condition.)
• Busbar undervoltage detector UVB and line overvoltage detector OVL1 operate, and
on-delay timer TDBL1 is picked up. (This detects the dead bus and live line condition.)
Using the scheme switch [VCHK], the energizing direction can be selected.
Setting of [VCHK]
LB
DB
SYN
OFF
When [VCHK] is set to "LB", the line is energized in the direction from the busbar to line under
the "live bus and dead line" condition. When [VCHK] is set to "DB", the lines are energized in
the direction from the line to busbar under the "dead bus and live line" condition.
When the synchronism check output exists, autoreclose is executed regardless of the position of
1 2
live live
live dead
[VCHK]
+
" "
OFF
" "
LB
" "
DB
" "
SY
TLBD1
LBDL
&
0.01 – 1.00S
TDBL1
DBLL
&
0.01 – 1.00S
T3PLL
498
0.01 – 1.00S
TSYN1
0.01 – 10.00S
Energizing control
Reclosed under the "live bus and dead line" condition or with synchronism check.
Reclosed under the "dead bus and live line" condition or with synchronism check.
Reclosed with synchronism check only.
Reclosed without voltage and synchronism check.
 118 
3 4
dead dead
live dead
&
&
3PLL
(Three phase live line)
6 F 2 S 0 8 5 0
159
SYN-OP
≥1