Siemens 7SK80 - Page 399

Technical Data
4.19 Flexible Protection Functions
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A5, Release date 11.2012
399
Function Limits
Times
Power measurement three-phase for I
Nom
= 1 A Positive sequence system current > 0.03 A
for I
Nom
= 5 A Positive sequence system current > 0.15 A
Power measurement single-phase for I
Nom
= 1 A Phase current > 0.03 A
for I
Nom
= 5 A Phase current > 0.15 A
Relationship I
2
/I
1
measurement
for I
Nom
= 1 A Positive or negative sequence system current >
0.1 A
for I
Nom
= 5 A Positive or negative sequence system current >
0.5 A
Pickup times:
Current, voltage (phase quantities)
for 2 times the setting value
for 10 times the setting value
approx. 30 ms
approx. 20 ms
Current, voltage (symmetrical components)
for 2 times the setting value
for 10 times the setting value
approx. 40 ms
approx. 30 ms
Power
typical
maximum (small signals and threshold values)
approx. 120 ms
approx. 350 ms
Power factor 300 to 600 ms
Frequency approx. 100 ms
Frequency change for 1.25 times the setting value approx. 220 ms
Voltage change dV/dt for 2 times the setting value approx. 220 ms
Binary input approx. 20 ms
Dropout times:
Current, voltage (phase quantities) < 20 ms
Current, voltage (symmetrical components) < 30 ms
Power
typical
maximum
< 50 ms
< 350 ms
Power factor < 300 ms
Frequency < 100 ms
Frequency change < 200 ms
Voltage change <200 ms
Binary input < 10 ms