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.
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