Siemens 7SJ82 Manual page 1490

Technical Data
12.20 Negative-Sequence Protection
Operate and Dropout Characteristic Curves
You can select from the following operate and dropout characteristic curves:
Table 12-3
Normal inverse: type A
Very inverse: type B
Extremely inverse: type C
Long-time inverse: type B
Table 12-4
Inverse: type C
Short inverse
Long inverse
Moderately inverse
Very inverse
Extremely inverse
Definite inverse
Extension of the Operating Time
Extension of the operate time during operation with
transformer inrush-current detection
Current Operating Range
Current range
Frequency Operating Range
0.9 ≤ f/f ≤ 1.1
rated
10 Hz ≤ 0.9 f
rated
1.1 f < f ≤ 80 Hz
rated
f < 10 Hz
f > 80 Hz
Tolerances
Reference value = rated current
Pickup value
Operate time for 2 ≤ I/I threshold value ≤ 20
Dropout time for I/I threshold value ≤ 0.90
Reference value = pos. seq. current
Pickup value
1490
Standard Characteristic Curves to IEC
Standard Characteristic Curves to ANSI
See chapter 12.5.2 Stage with Inverse-Time Charac-
teristic Curve, Figure 12-1
See chapter 12.5.2 Stage with Inverse-Time Charac-
teristic Curve, Figure 12-2
See chapter 12.5.2 Stage with Inverse-Time Charac-
teristic Curve, Figure 12-3
See chapter 12.5.2 Stage with Inverse-Time Charac-
teristic Curve, Figure 12-4
See chapter 12.5.2 Stage with Inverse-Time Charac-
teristic Curve, Figure 12-5
See chapter 12.5.2 Stage with Inverse-Time Charac-
teristic Curve, Figure 12-6
Approx. 10 ms
At least one phase current ≥ setting value I
All phase currents ≤ setting value I
According to specified tolerances
Slightly expanded tolerances
Inactive
Approx. 2 % of the setting value or
0.8 % of the absolute value
5 % of the setting value or
+ 2 % of the current tolerance or 30 ms
5 % of the setting value or
+ 2 % of the current tolerance or 30 ms
Approx. 2 % of the setting value
or 4 % of the absolute value
(I1 > 50 mA (I = 1 A) or 250 mA (I
rated
SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
release
ph, max
= 5 A))
rated