Table 11-4 Standard Characteristic Curves to ANSI
Inverse: type C See chapter 11.8.2 Stage with Inverse-Time Charac-
teristic Curve, Figure 11-3
Short inverse
Long inverse See chapter 11.8.2 Stage with Inverse-Time Charac-
teristic Curve, Figure 11-4
Moderately inverse
Very inverse See chapter 11.8.2 Stage with Inverse-Time Charac-
teristic Curve, Figure 11-5
Extremely inverse
Definite inverse See chapter 11.8.2 Stage with Inverse-Time Charac-
teristic Curve, Figure 11-6
Extension of the Operating Time
Extension of the operate time during operation with
transformer inrush-current detection
Approx. 10 ms
Current Operating Range
Current range At least one phase current ≥ setting value I
release
All phase currents ≤ setting value I
ph, max
Frequency Operating Range
0.9 ≤ f/f
rated
≤ 1.1 According to specified tolerances
10 Hz ≤ 0.9 f
rated
1.1 f
rated
< f ≤ 80 Hz
Slightly expanded tolerances
f < 10 Hz
f > 80 Hz
Inactive
Tolerances
Reference value = rated current
Pickup value Approx. 2 % of the setting value or
0.8 % of the absolute value
Operate time for 2 ≤ I/I threshold value ≤ 20 5 % of the setting value or
+ 2 % of the current tolerance or 30 ms
Dropout time for I/I threshold value ≤ 0.90 5 % of the setting value or
+ 2 % of the current tolerance or 30 ms
Reference value = pos. seq. current
Pickup value Approx. 2 % of the setting value
or 4 % of the absolute value
(I1 > 50 mA (I
rated
= 1 A) or 250 mA (I
rated
= 5 A))
Operate time for 2 ≤ I/I threshold value ≤ 20 5 % of the reference (calculated) value
+ 2 % current tolerance or 30 ms
Dropout time for I/I threshold value ≤ 0.90 5 % of the reference (calculated) value
+ 2 % current tolerance or 30 ms
Technical Data
11.30 Stage with Inverse-Time Characteristic Curve
SIPROTEC 5, High-Voltage Bay Controller, Manual 1189
C53000-G5040-C015-A, Edition 05.2018
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