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Technical Data
12.10 Voltage Protection
T
Inv
T
add
[fo_UVP3ph_1_3pol_inverse, 2, en_US]
Where
T
Inv
T
p
V
V
thresh
k
α
c
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 time
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 for Stage Type Definite Time-Undervoltage Protection
Voltages
Currents
Time delays
65
OOT (Output Operating Time) additional delay of the output medium used, see chapter
840
Inverse-time delay
Additional time delay (Parameter Additional time delay)
Inverse-time delay
Time multiplier (Parameter Time dial)
Measured undervoltage
Threshold value (Parameter Threshold)
Curve constant k (Parameter Charact. constant k)
Curve constant α (Parameter Charact. constant α)
Curve constant c (Parameter Charact. constant c)
Approx. 25 ms + OOT
Approx. 22 ms + OOT at 60 Hz
Approx. 20 ms + OOT
rated
0.5 % of the setting value or 0.05 V
1 % of the setting value or 5 mA (I
10 %), valid for protection-class current transformers
1 % of the setting value or 0.1 mA (I
f
± 10 %), valid for instrument transformers
rated
1 % of the setting value or 10 ms
150 mV sec.
65
at 50 Hz
According to specified tolerances
Slightly expanded tolerances
Inactive
rated
12.1.4 Relay Outputs
= 1 A) or 25 mA (I
= 5 A, f
rated
= 1.6 A) or 0.5 mA (I
rated
rated
SIPROTEC 5, Merging Unit 6MU85, Manual
C53000-G5040-C074-1, Edition 01.2020
±
rated
= 8 A,
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