Siemens siprotec 7SA6 User Manual

Functions
6-92 7SA6 Manual
C53000-G1176-C156-2
The permissive transfer trip should only trip for faults in the Forward direction. Ac-
cordingly, the first zone Z1of the distance protection must definitely be set to
Forward
in address 1301 Op. mode Z1, refer also to Subsection 6.2.4.2 under the margin
heading “Independent Zones Z1 up to Z5”.
On two terminal lines, the signal transmission may be done phase segregated. On
three end lines, the transmit signal is sent to both opposite line ends. The receive sig-
nals are then combined with an
OR logic function. By means of the parameter Line
Config.
(address 2102) the device is informed whether it has one or two opposite
ends.
If at one line end there is weak or zero infeed, so that the distance protection does not
pick up, the circuit breaker can still be tripped. This “weak-infeed tripping” is referred
to in Section 6.9.
Figure 6-51 Logic diagram of the permissive underreach transfer trip (PUTT) scheme with
pick-up (one line end)
4007
>Dis.T.Rec.Ch1 L1
4006
>DisTel Rec.Ch1
Dis Z1 L1
&
Dis Z1 L2
&
Dis Z1 L3
&
Dis Z1
&
Dis. forward
T0
T0
T0
T0
&
&
&
&
&
&
&
≥1
≥1
≥1
Dis Enable Pickup L2
Dis Enable Pickup L3
Dis Enable Pickup L1
Three terminals
Two terminals
Three terminals
Two terminals
„1“
2102
Line Config.
≥1
&
Dis.T.SEND L1
Dis.T.SEND L2
Dis.T.SEND L3
Dis.T.SEND
2103
Send Prolong.
4057
4058
4059
4056
4010
>DisTel Rec.Ch2
4008
>Dis.T.Rec.Ch1 L2
4009
>Dis.T.Rec.Ch1 L3
>Dis.Telep. Blk
>Dis.RecFail
FNo 4005
≥1
Dis Telep. off
Dis.Telep.OFF
Dis.T.Carr.Fail.
4055
4052

Siemens siprotec 7SA6 Specifications

General

Brand	Siemens
Model	siprotec 7SA6
Category	Relays
Language	English