Siemens SIPROTEC

Technical Data
4.19 Undervoltage and Overvoltage Protection (optional)
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
622
Phase-phase undervoltages
Undervoltage Positive Sequence SystemU
1
Undervoltage U
PhPh
<< 1.0 V to 175.0 V Increments 0.1 V
Delay T
UPhPh<<
0.00 s to 100.00 s; ∞ Increments 0.01 s
Undervoltage U
PhPh
< 1.0 V to 175.0 V Increments 0.1 V
Delay T
UPhPh<
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
Undervoltage U
1
<< 1.0 V to 100.0 V Increments 0.1 V
Delay T
U1<<
0.00 s to 100.00 s; ∞ Increments 0.01 s
Undervoltage U
1
< 1.0 V to 100.0 V Increments 0.1 V
Delay T
U1<
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