Functions
6-857SA6 Manual
C53000-G1176-C133-1
function. This “Weak Infeed Function” (echo function) is referred to in Sub-section
6.4.1.11. It is activated when a signal is received from the opposite line end — in the
case of three terminal lines from at least one of the opposite line ends — without the
device having detected a fault.
The circuit breaker can also be tripped at the line end that has only weak or no infeed.
This “Weak-Infeed Tripping” is referred to in Section 6.7.
Figure 6-50 Logic diagram of the directional comparison pick-up scheme (one line end)
Two terminals
Dis Telep. off
>Dis.Telep. Blk
≥1
Dis. forward L1
Dis. forward L2
Dis. forward. L3
Dis. forward
Send Prolong
T0
&
&
&
&
>Dis.T.RecCh1L1
>Dis.T.RecCh1L3
>Dis.T.RecCh1L2
&
&
&
≥1
≥1
≥1
Z4 instantaneous trip L3
>DisTel Rec.Ch1
>DisTel Rec.Ch2
Three terminals
Two terminals
Three terminals
„1“
Line Config.
≥1
&
TRIP Command
&
&
&
&
T0
T0
T0
≥1
≥1
≥1
≥1
≥1
≥1
Dis.Telep.OFF
Dis.T.SEND L1
Dis.T.SEND L2
Dis.T.SEND L3
Dis.T.SEND
&
&
Transient Blocking
(Section 6.4.1.10)
Echo function
Section 6.4.1.11
FNr 4003
FNr 4006
FNr 4010
FNr 4007
FNr 4008
FNr 4009
FNr 4052
FNr 4057
FNr 4058
FNr 4059
FNr 4056
>Dis. RecFail
FNr 4005
Z4 instantaneous trip L2
Z4 instantaneous trip L1
Dis.T.Carr.Fail
FNr 4055
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