12
t
t
CHECK
CHECK
t
PULSE
t
PULSE
R
R
CS13
cond13
BS13
out13
NC13
CSF13
&
&
500 ms
min.
100 ms
Fig. 10. A simplified block diagram for the command mode operation.
Abbreviations used in the block diagrams:
U1, U2, U3
Measured bus/line voltages
BS13
External blocking signal for stage 1
BS23
External blocking signal for stage 2
CS13
External command signal for stage 1
CS23
External command signal for stage 2
SGF
Functional switchgroup SGF
SGB
Functional switchgroup SGB
SGR
Functional switchgroup SGR
CB13
Closing signal of stage 1
CB23
Closing signal of stage 2
ALARM
Alarm signal output for stage 1 and 2
Yellow LED indicator for closing operation
T1, T2, T3, T4, T5, T6
Operation indicators indicated on the display
cond13
Closing conditions for stage 1
cond 23
Closing conditions for stage 2
out13
Output signal from stage 1 in command mode operation
out23
Output signal from stage 2 in command mode operation
NC13
Alarm for failed closing attempt from stage 1
NC23
Alarm for failed closing attempt from stage 2
CSF13
Alarm for too long a command signal CS13 from stage 1
CSF23
Alarm for too long a command signal CS23 from stage 2
Note!
All input and output signals from the synchro-
check module are not necessarily wired to the
terminals of every relay assembly using this
module. The signals wired to the terminals of
the relay are shown in the diagram illustrating
the signal flow between the plug-in modules of
the relay assembly.