Siemens siprotec 7SA522, User Manual

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Technical Data
10-20
7SA522 Manual
C53000-G1176-C119-2
10.6 Earth Fault Protection Teleprotection Schemes
Comparison
Schemes Methods directional comparison pickup scheme
directional unblocking scheme
directional blocking scheme
Application 2-terminal lines
3-terminal lines
multi-terminal lines via CFC
Send signal prolongation 0.00 s to 30.00 s (steps 0.01 s)
Release signal prolongation 0.000 s to 30.000 s (steps 0.001 s)
Transient blocking time 0.00 s to 30.00 s (steps 0.01 s)
Waiting time for transient blocking 0.00 s to 30.00 s;
∞
(steps 0.01 s)
Echo delay time 0.00 s to 30.00 s (steps 0.01 s)
Echo impulse duration 0.00 s to30.00 s (steps 0.01 s)
Time expiry tolerances 1 % of set value or 10 ms
The set times are pure delay times
.
10.7 Weak-Infeed Tripping
Operation method Phase segregated undervoltage detection after reception of a carrier signal from the
remote end
Undervoltage
Detection Setting value U
PhE
< 2 V to 70 V (steps 1 V)
Drop-out to pick-up ratios approx. 1.05
Pick-up tolerances
≤
5 % of set value or 0.5 V
Times Release delay 0.00 s to 30.00 s (steps 0.01 s)
Release prolongation 0.00 s to 30.00 s (steps 0.01 s)
Time expiry tolerances 1 % of set value or 10 ms
10.8 External Direct and Remote Tripping
External Trip of the
Local Breaker Operating time, total approx. 11 ms
Trip time delay 0.00 s to 30.00 s,
∞
(steps 0.01 s)
Time expiry tolerance 1 % of set value or 10 ms
The set time is a pure delay time.