Siemens siprotec 7SA522 - Overvoltage Protection

Technical Data
10-257SA522 Manual
C53000-G1176-C119-2
Non-Synchronous
System Conditions
∆f-measurement 0.03 Hz to 2.00 Hz
(steps 0.01 Hz)
Tolerance 15 mHz
Threshold synchronous /
non-synchronous 0.01 Hz
Circuit-breaker operating time 0.01 s to 0.60 s
Times Minimum measuring time approx. 80 ms
Maximum time delay 0.01 s to 600.00 s; ∞
(steps 0.01 s)
Tolerance of all timers 1 % of set value or 10 ms
10.13 Overvoltage Protection
Phase Voltages Measurement voltages phase–earth
separate reference voltage U
x
Pick-up value U
Ph
> 1.0 V to 170.0 V (steps 0.1 V)
Delay time T
UPh>
0.00 s to 30.00 s (steps 0.01 s)
Drop-out to pick-up ratio approx. 0.95
Pick-up time approx. 30 ms
Drop-out time approx. 30 ms
Trip command local and/or transfer
Carrier impulse time T
Uph>Imp
0.05 s to 0.50 s (steps 0.01 s)
Tolerances U
Ph
> ≤ 3 % of set value or 1 V
T
UPh>
1 % of set value or 10 ms
Displacement
Voltage
Measurement zero sequence voltage 3·U
0
Pick-up value 3U
0
> 1.0 V to 300.0 V (steps 0.1 V)
Delay time T
3U0>
0.00 s to 30.00 s (steps 0.01 s)
Drop-out to pick-up ratio 0.50 to 0.95 (steps 0.01)
Pick-up time approx. 65 ms
Drop-out time approx. 30 ms
Trip command local and/or transfer
Trip impulse time T
3U0>Imp
0.05 s to 0.50 s(steps 0.01 s)
Tolerances 3U
0
> ≤ 3 % of set value or 1 V
T
3U0>
1 % of set value or 10 ms