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Dropout time, typical
Dropout time, maximum
Frequency Operating Range
0.9 ≤ f/f
≤ 1.1
rated
10 Hz ≤ f < 0.9 f
1.1 f
< f ≤ 90 Hz
rated
f < 10 Hz
f > 90 Hz
Tolerances
Voltages
Time delays
12.10.9
Overvoltage Protection with Negative-Sequence Voltage/Positive-Sequence
Voltage
Setting Values for the Function
Measuring window
Minimum voltage V1
Setting Values for Stage Types
Pickup value of V2/V1
Operate delay
Dropout ratio
Dropout
The greater dropout differential (= | pickup value – dropout value |) of the following 2 criteria
applies:
Dropout differential derived from the parameter Dropout ratio
If this parameter is not available, a dropout ratio of 95 % applies for the overvoltage and of 105 % for the
undervoltage functionality.
Minimum absolute dropout differential
Times
Pickup times
Dropout times
69
OOT (Output Operating Time): additional delay of the output medium used, for example 5 ms with fast relays
SIPROTEC 5, Merging Unit 6MU85, Manual
C53000-G5040-C074-1, Edition 01.2020
According to specified tolerances
Slightly expanded tolerances
rated
Inactive, maintained;
Dropout of the pickup induced by blocking or by increasing the
measurand beyond the dropout threshold
0.5 % of the setting value or 0.05 V
1 % of the setting value or 10 ms
Approx. 25 ms + OOT
Approx. 30 ms + OOT
1 cycle to 10 cycles
0.300 V to 60.000 V
0.50 % to 100.00 %
0.00 s to 60.00 s
0.90 to 0.99
150 mV sec.
69
55 ms to 210 ms + OOT
(depends on the measuring-window length) at 50 Hz
48 ms to 190 ms + OOT
(depends on the measuring-window length) at 60 Hz
22 ms to 55 ms + OOT
(depends on the measuring-window length) at 50 Hz
18 ms to 45 ms + OOT
(depends on the measuring-window length) at 60 Hz
Technical Data
12.10 Voltage Protection
Increments of 1 cycle
Increments of 0.001 V
Increments of 0.01 %
Increments of 0.01 s
Increments of 0.01
843
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