[logikdiagramm-frequenzschutz-wlk-190802, 1, en_US]
Figure 2-52
Logic diagram of frequency protection for 50 Hz rated frequency
Setting Notes
General
Frequency protection is only in effect and accessible if address 136
81 O/U
is set to
Enabled
during configu-
ration of protective functions. If the function is not required, set
Disabled
.
The frequency protection function features 4 frequency elements f1 to f4 each of which can function as over-
frequency element or underfrequency element. Each zone can be set active or inactive. This is set in
addresses:
•
3601
81 O/U FREQ. f1
for frequency element f1,
•
3611
81 O/U FREQ. f2
for frequency element f2,
•
3621
81 O/U FREQ. f3
for frequency element f3,
•
3631
81 O/U FREQ. f4
for frequency element f4.
The following 3 options are available:
2.9.2
Functions
2.9 Frequency Protection (optional) 81
SIPROTEC 4, 7SD80, Manual
125
E50417-G1100-C474-A2, Edition 02.2018
Summary of Contents for SIPROTEC 4 7SD80
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