4 Technical Data
550
7SD5 Manual
C53000-G1176-C169-1
4.9 Teleprotection for Earth Fault Protection (optional)
Mode
Comparison Schemes
For two line ends One channel for each direction or three channels each direc-
tion for phase-segregated transmission
For three line ends With one channel for each direction or connection
Method Dir. comp. pickup
Directional unblocking scheme
Directional blocking scheme
Send signal prolongation 0.00 s to 30.00 s Increments 0.01 s
Enable delay 0.000 s to 30.000 s Increments 0.001 s
Transient blocking time 0.00 s to 30.00 s Increments 0.01 s
Wait time for transient blocking 0.00 s to 30.00 s; ∞ Increments 0.01 s
Echo delay time 0.00 s to 30.00 s Increments 0.01 s
Echo impulse duration 0.00 s to 30.00 s Increments 0.01 s
Time expiry tolerances 1 % of setting value or 10 ms
The set times are pure delay times
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