Siemens siprotec 7SD5 User Manual

2.7 Teleprotection for Distance Protection (optional)
205
7SD5 Manual
C53000-G1176-C169-1
An endless echo signal between the line ends can be avoided (e.g. interference cou-
pling in the signal path) by blocking a new echo for a certain time Echo BLOCK Time
(address 2504) after each output of an echo signal. The typical setting is approx. 50
ms. After the distance protection signal was sent, the echo is equally blocked for the
time Echo BLOCK Time. This setting is only possible via DIGSI
®
at Additional Set-
tings.
If the distance protection and earth fault protection use a common transmission chan-
nel, spurious tripping may occur when the distance protection and the earth fault pro-
tection create an echo independently of each other. For this scenario, parameter
Echo:1channel (address 2509) must be set to YES. The default setting is NO.
Note
The „ECHO SIGNAL“ (No. 4246) must be allocated separately to the output relays for
the transmitter actuation, as it is not contained in the transmit signals of the transmis-
sion functions.
The echo function settings are common to all weak infeed measures and summarized
in tabular form in Section 2.10.1.
2.7.15 Settings
Addresses which have an appended "A" can only be changed with DIGSI, under Ad-
ditional Settings.
2.7.16 Information List
Addr. Parameter Setting Options Default Setting Comments
2101 FCT Telep. Dis. ON
OFF
ON Teleprotection for Distance prot. is
2102 Type of Line Two Terminals
Three terminals
Two Terminals Type of Line
2103A Send Prolong. 0.00 .. 30.00 sec 0.05 sec Time for send signal prolongation
2107A Delay for alarm 0.00 .. 30.00 sec 10.00 sec Time Delay for Alarm
2108 Release Delay 0.000 .. 30.000 sec 0.000 sec Time Delay for release after
pickup
2109A TrBlk Wait Time 0.00 .. 30.00 sec; ∞ 0.04 sec Transient Block.: Duration exter-
nal flt.
2110A TrBlk BlockTime 0.00 .. 30.00 sec 0.05 sec Transient Block.: Blk.T. after ext.
flt.
No. Information Type of In-
formation
Comments
4001 >Dis.Telep. ON SP >Distance Teleprotection ON
4002 >Dis.Telep.OFF SP >Distance Teleprotection OFF
4003 >Dis.Telep. Blk SP >Distance Teleprotection BLOCK
4005 >Dis.RecFail SP >Dist. teleprotection: Carrier faulty
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Siemens siprotec 7SD5 Specifications

General

Brand	Siemens
Model	siprotec 7SD5
Category	Relays
Language	English