Time multiplier 0.00 to 15.00 Increments of 0.01
Minimum time of the curve 0.00 s to 1.00 s Increments of 0.01 s
Additional time delay 0.00 s to 60.00 s Increments of 0.01 s
Dropout
The greater dropout differential (= | pickup value – dropout value |) of the following 2 criteria
applies:
Dropout 95 % of 1.1 ⋅ threshold value
Minimum absolute dropout differential
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)
Reset of the Integration Timer
Instantaneous With dropout
Disk emulation Approx. < 0.90 ⋅ threshold value
Operate Curves and Dropout-Time Characteristic Curves according to IEC
Normal inverse: type A
See Figure 11-8 in chapter 11.16.2 Stage with
Inverse-Time Characteristic Curve
Very inverse: type B
Extremely inverse: type C See Figure 11-9 in chapter 11.16.2 Stage with
Inverse-Time Characteristic Curve
Long-time inverse: type B
Short-time inverse
(Only in the advanced stage)
See Figure 11-10 in chapter 11.16.2 Stage with
Inverse-Time Characteristic Curve
Operate Curves and Dropout-Time Characteristic Curves according to ANSI/IEEE
Inverse: type C
See Figure 11-11 in chapter 11.16.2 Stage with
Inverse-Time Characteristic Curve
Short inverse
Long inverse See Figure 11-12 in chapter 11.16.2 Stage with
Inverse-Time Characteristic Curve
Moderately inverse
Very inverse See Figure 11-13 in chapter 11.16.2 Stage with
Inverse-Time Characteristic Curve
Extremely inverse
Definite inverse See Figure 11-14 in chapter 11.16.2 Stage with
Inverse-Time Characteristic Curve
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 operation with
inrush-current detection
Approx. 10 ms
Dropout time Approx. 20 ms + OOT
Technical Data
11.18 Directional Overcurrent Protection, Ground
954 SIPROTEC 5, Low-Impedance Busbar Protection, Manual
C53000-G5040-C019-C, Edition 04.2021
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