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Technical Data
4.19 Undervoltage and Overvoltage Protection (optional)
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
621
Overvoltage negative sequence system U
2
Overvoltage zero sequence system 3U
0
or any single-phase voltage U
X
Phase-earth undervoltages
Overvoltage U
2
>> 2.0 V to 220.0 V;
∞
Increments 0.1 V
Delay T
U2>>
0.00 s to 100.00 s;
∞
Increments 0.01 s
Overvoltage U
2
> 2.0 V to 220.0 V;
∞
Increments 0.1 V
Delay T
U2>
0.00 s to 100.00 s;
∞
Increments 0.01 s
Dropout ratio 0.30 to 0.99 Increments 0.01
Pick-up times Approx. 35 ms
Dropout time Approx. 30 ms
Tolerances Voltages 3 % of setting value or 1 V
Times 1 % of setting value or 10 ms
Overvoltage 3U
0
>> 1.0 V to 220.0 V;
∞
Increments 0.1 V
Delay T
3U0>>
0.00 s to 100.00 s;
∞
Increments 0.01 s
Overvoltage 3U
0
> 1.0 V to 220.0 V;
∞
Increments 0.1 V
Delay T
3U0>
0.00 s to 100.00 s;
∞
Increments 0.01 s
Dropout ratio 0.30 to 0.99 Increments 0.01
Pick-up times
With repeated measurement
Approx. 75 ms
Without repeated measurement Approx. 35 ms
Dropout time
With repeated measurement
Approx. 75 ms
Without repeated measurement Approx. 30 ms
Tolerances Voltages 3 % of setting value or 1 V
Times 1 % of setting value or 10 ms
Undervoltage U
Ph
<< 1.0 V to 100.0 V Increments 0.1 V
Delay T
UPh<<
0.00 s to 100.00 s;
∞
Increments 0.01 s
Undervoltage U
Ph
< 1.0 V to 100.0 V Increments 0.1 V
Delay T
UPh<
0.00 s to 100.00 s;
∞
Increments 0.01 s
Dropout ratio 1.01 to 1.20
Current criterion Can be switched on/off
Pick-up times Approx. 35 ms
Dropout time Approx. 30 ms
Tolerances Voltages 3 % of setting value or 1 V
Times 1 % of setting value or 10 ms