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4.12
Frequency Protection (Optional)
Frequency Elements
Quantity
4, depending on setting effective on f< or f>
Pickup Values
f> or f< adjustable for each element
at f
= 50 Hz
Nom
at f
= 60 Hz
Nom
Times
Pickup times f>, f<
Dropout times f>, f<
Time delays T
The set times are pure time delays.
Note on drop-off times:
Drop-off was enforced by current = 0 A and voltage = 0 V.
Enforcing the drop-off by means of a frequency change below the drop-off threshold extends the drop-off times.
Dropout Difference
Δf = Ι pickup value - dropout value Ι
Operating Ranges
In voltage range
In frequency range
Tolerances
Frequencies f>, f< in specific range (f
Time delays T(f<, f>)
SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018
45.50 Hz to 54.50 Hz
55.50 Hz to 64.50 Hz
approx. 85 ms
approx. 30 ms
0,00 s to 600,00 s
0.02 Hz to 1 Hz
approx. 0.65 · V
25 Hz to 70 Hz
± 10 %)
15 mHz in range V
Nom
1 % of setting value or 10 ms
4.12 Frequency Protection (Optional)
Increments 0.01 Hz
Increments 0.01 Hz
Increments 0,01 s
to 230 V (phase-to-phase)
N
: 50 V to 230 V
PhPh
Technical Data
281
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