Instantaneous Approx. 1.05 * threshold value
Approx. 0.95 * pickup value
Dropout
The greater dropout difference (= | pickup value – dropout value |) of the following 2 criteria
applies:
Dropout difference derived from the parameter Dropout ratio
If this parameter is not available, a dropout ratio of 95 % applies for overcurrent and of 105 % for undercur-
rent functionality.
Minimum absolute dropout difference
Protection-class current transformer 15 mA sec. (I
rated
= 1 A) or
75 mA sec. (I
rated
= 5 A)
Instrument current transformer 0.5 mA sec. (I
rated
= 1 A) or
2.5 mA sec. (I
rated
= 5 A)
Times
The maximum pickup time with operate
delay = 0 ms
Approx. 30 ms + OOT at 50 Hz
Approx. 25 ms + OOT at 60 Hz
Extension of the operate time during oper-
ation with inrush-current detection
Approx. 10 ms
Dropout time Approx. 20 ms + OOT
Frequency Operating Range
0.9 ≤ f/f
rated
≤ 1.1 According to specified tolerances
10 Hz ≤ f < 0.9 f
rated
1.1 f
rated
< f ≤ 80 Hz
Slightly expanded tolerances
f < 10 Hz
f > 80 Hz
Active with reduced sensitivity
Tolerances
Currents, method of measurement = fundamental
component
1 % of setting value or 5 mA (I
rated
= 1 A) or 25 mA
(I
rated
= 5 A)
Currents, method of measurement = RMS value
(33 % part of harmonic, referring to fundamental
component)
Up to 30th harmonic
1 % of setting value or 5 mA (I
rated
= 1 A)
or 25 mA (I
rated
= 5 A), (f
rated
± 10 %)
Up to 50th harmonic, f
rated
= 50 Hz
3 % of setting value or 20 mA (I
rated
= 1 A)
or 100 mA (I
rated
= 5 A), (f
rated
± 10 %)
Up to 50th harmonic, f
rated
= 60 Hz
4 % of setting value or 20 mA (I
rated
= 1 A)
or 100 mA (I
rated
= 5 A), (f
rated
± 10 %)
Definite-time operate time 1 % of the setting or 10 ms
Inverse-time operate time to IEC, ANSI, logarithmic
inverse-time characteristic, logarithmic inverse time
with knee-point characteristic, and user-defined charac-
teristic curve
5 % of setting value or +2 % current tolerance or 30
ms
Technical Data
11.11 Directional Time-Overcurrent Protection, Ground
SIPROTEC 5, High-Voltage Bay Controller, Manual 1139
C53000-G5040-C015-9, Edition 11.2017
To Next Page
Loading...
