Frequency Protection - Siemens SIPROTEC 4 7UT6 Series Manual

4.16

Frequency Protection

Measuring Range of the Frequency Functions
Lower frequency limit
Upper frequency limit
Minimum positive sequence
voltage for frequency measure-
ment (phase-phase voltage)
Minimum positive sequence
voltage for frequency measure-
ment (non-interlinked voltage)
Setting Ranges / Increments
Number of frequency elements
Pickup values f<, f<<, f<<<
Pickup value f>
Delay times T f<<
Delay times T f<, T f<<<,T f>
Undervoltage blocking
(positive sequence component U
The set times are pure delay times
1) No pickup is effected below the minimum voltage for frequency measurement
Times
Pickup times f>, f<
Dropout times f>, f<
Dropout difference
Δf = | Pickup Value – Dropout Value |
Dropout ratio
Dropout ratio for Undervoltage Blocking
SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016
Rated frequency 50/60/16.7 Hz
Rated frequency 50/60 Hz
Rated frequency 16.7 Hz
approx. 8.6 V
approx. 5 V
4; can be set to f<, f<<, f<<< or f>
Rated frequency 50 Hz
Rated frequency 60 Hz
Rated frequency 16.7 Hz
Rated frequency 50 Hz
Rated frequency 60 Hz
Rated frequency 16.7 Hz
0.00 s to 600.00 s
or ∞ (disabled)
0.00 s to 100.00 s
or ∞ (disabled)
10.0 V to 125.0 V and
) 0 V (no blocking)
1)
1
50/60 Hz
16.7 Hz
50/60 Hz
16.7 Hz
approx. 20 mHz
approx. 1.10
Technical Data
4.16 Frequency Protection
approx. 9.25 Hz
approx. 70 Hz
approx. 23.33 Hz
40.00 to 49.99 Hz
or 0 (disabled)
50.00 to 59.99 Hz
or 0 (disabled)
10.00 to 16.69 Hz
or 0 (disabled)
50.01 to 66.00 Hz
or ∞ (disabled)
60.01 to 69.99 Hz
or ∞ (disabled)
60.01 to 69.99 Hz
or ∞ (disabled)
Increments 0.01 s
Increments 0.01 s
Increments 0.1 V
approx. 100 ms
approx. 300 ms
approx. 160 ms
approx. 480 ms
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