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Technical Data
12.10 Voltage Protection
Setting Values
Pickup value of V2
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 time
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
Overvoltage Protection with Zero-Sequence Voltage/Residual Voltage
12.10.4
Setting Values
Method of measurement
Block. on measuring-voltage outage
Determ. ph. aff. by grd. flt.
Threshold value
OOT (Output Operating Time): additional delay of the output medium used, for example 5 ms with fast relays
58
59
If you have selected the method of measurement = RMS value, do not set the threshold value under 10 V.
836
rated
59
0.300 V to 200.000 V
0.00 s to 60.00 s
0.90 to 0.99
150 mV sec.
55 ms to 210 ms + OOT
(depends on the measuring-window length) at 50 Hz
48 ms to 185 ms + OOT
(depends on the measuring-window length) at 60 Hz
20 ms to 70 ms + OOT
(depends on the measuring-window length)
According to specified tolerances
Slightly expanded tolerances
Inactive
0.50 % of the setting value or 0.050 V
1.00 % of the setting value or 10 ms
RMS value
Fundamental component
Fundamental component
over 2 cycle filters
Yes
No
Yes
No
0.300 V to 340.000 V
Increments of 0.001 V
Increments of 0.01 s
Increments of 0.01
58
Increments of 0.001 V
SIPROTEC 5, Merging Unit 6MU85, Manual
C53000-G5040-C074-1, Edition 01.2020
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