-ETHOD OF OPERATION3*
6
#
' #
WITH A DELAY OF S 7HEN THE INTERLOCKING SIGNAL IS
TRANSMITTED VIA A NORMALLY CLOSED DC CIRCUIT THE DC
LINK CAN EASILY BE MONITORED BY AN AUXILIARY RELAY
) )
3* 3*
) )
3* 3*
) )
3* 3*
BLOCKING SIGNALS INTERLOCKING
PICK UP OF THE NON DIRECTIONAL STAGE
)
PICK UP IN THE CORRESPONDING FAULT DI
RECTION
)
&IGURE &AST PROTECTION BY REVERSE INTERLOCKING
)
,
) $)2
)P $)2
S
,
,
,
3TABILIZED DIRECTION
DISCRIMINATION
,
)
,
5
, ,
&.O
<))P, FW
&.O
FORWARD DIRECTION
REVERSE DIRECTION
)
%
)% $)2
)%P $)2
3TABILIZED DIRECTION
DISCRIMINATION
%
&.O
< )%)%P FW
&.O
< )%)%P RW
)NTERLOCKING OF FORWARD
DIRECTION DISTURBED
&.O
"LK FW FAIL
&.O
"LK FW FAILED
S
&.O
"LK RW FAIL
&.O
"LK RW FAILED
)NTERLOCKING OF REVERSE
DIRECTION DISTURBED
<))P, FW
<))P, FW
<))P, RW
<))P, RW
<))P, RW
FORWARD DIRECTION
REVERSE DIRECTION
!NNUNCIATION
&UNCTION NUMBER
&IGURE ,OGIC DIAGRAM OF ANNUNCIATIONS FOR INTERLOCKING AND PILOW WIRE SUPERVISION
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