Siemens siprotec 7SA522 - Setting Notes

2 Functions
290
7SA522 Manual
C53000-G1176-C155-3
Figure 2-118 Logic diagram of frequency protection for 50 Hz rated frequency
2.16.2 Setting Notes
General Frequency protection is only in effect and accessible if address  )5(48(1&<
3URW is set to (QDEOHG during configuration of protective functions. If the function is
not required, 'LVDEOHG is to be set.
The frequency protection function features 4 frequency stages f1 to f4 each of which
can function as overfrequency stage or underfrequency stage. Each zone can be set
active or inactive. This is set in addresses:
•  28)5(4I for frequency stage f1,
•  28)5(4I for frequency stage f2,
•  28)5(4I for frequency stage f3,
•  28)5(4I for frequency stage f4,