Earth Fault Protection Teleprotection Schemes - Siemens siprotec 7SA522 User Manual

Technical Data
10.6

Earth Fault Protection Teleprotection Schemes

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