2.6 Teleprotection for distance protection
149
7SA522 Manual
C53000-G1176-C155-3
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
(FKRFKDQQHO (address ) must be set to <(6. The default setting is 12.
Note
The ´(&+26,*1$/µ (FNo. 4246) must be allocated separately to the output relays
for the transmitter actuation, as it is not contained in the transmit signals of the trans-
mission functions. On the digital protection data interface with permissive overreach
transfer trip mode, the echo is transmitted as a separate signal without taking any
special measures.
The echo function settings are common to all weak infeed measures and summarized
in tabular form in Section 2.9.1.
2.6.11 Settings
Addresses which have an appended "A" can only be changed with DIGSI, under Ad-
ditional Settings.
2.6.12 Information List
Addr. Parameter Setting Options Default Setting Comments
2101 FCT Telep. Dis. ON
PUTT (Z1B)
POTT
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
4006 >DisTel Rec.Ch1 SP >Dis.Tele. Carrier RECEPTION Channel 1
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