Siemens siprotec 7SA522 User Manual

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.

Siemens siprotec 7SA522 Specifications

General

Brand	Siemens
Model	siprotec 7SA522
Category	Protection Device
Language	English