Siemens siprotec 7SA6 User Manual page 261

Sequence
7SA6 Manual
C53000-G1176-C133-1
A
Z1B(B)
Z1
(A)
T1
T1B
Z1B
&
(A)
further
zones
Figure 6-44 Operation scheme of the permissive underreach transfer trip method via Z1B
Figure 6-45 shows the logic diagram of the permissive underreach transfer trip
scheme for one line end.
Dis Telep. off
FNo 4003
>Dis.Telep. Blk
FNo 4005
>Dis.RecFail
! "
Dis. forward
Dis Z1 L1
Dis Z1 L2
Dis Z1 L3
Dis Z1
! ! GvrÃ8‚svtÃ
„1"
4006 >DisTel Rec.Ch1
4010 >DisTel Rec.Ch2
4007 >Dis.T.Rec.Ch1 L1
4008 >Dis.T.Rec.Ch1 L2
4009 >Dis.T.Rec.Ch1 L3
Figure 6-45 Logic diagram of the permissive underreach transfer trip (PUTT) scheme using
Z1B (one line end)
Z1(B)
T
S
transm.
≥1
trip
rec..
≥1
TrqÃQ…‚y‚tÃ
0 T
&
0 T
&
0 T
&
0 T
&
Two terminals
Three terminals
≥1
Two terminals
Three terminals
Z1(A)
B
T
S
transm.
T1
T1B
≥1
&
trip
rec..
4052 Dis.Telep.OFF
4055
&
4057
Dis.T.SEND L1
&
4058 Dis.T.SEND L2
&
Dis.T.SEND L3
4059
&
4056 Dis.T.SEND
&
≥1
&
Dis Enable Z1B/T1B L1
≥1
& Dis Enable Z1B/T1B L2
≥1
&
Dis Enable Z1B/T1B L3
Functions
Z1B(A)
Z1
(B)
Z1B
(B)
further
zones
Dis.T.Carr.Fail.
6-79