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Technical Data
12.16 Non-Directional Intermittent Ground-Fault Protection
12.16
Non-Directional Intermittent Ground-Fault Protection
Setting Values
Threshold
For current transformer type protection
value 3I0>
and I
interm.
For current transformer type protection
and I
For I
type sensitive and
I
N-rated
For I
type sensitive and
I
N-rated
Number of pickups until intermittent ground fault
Pickup extension time
Sum of extended pickup times
Reset time
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 overcurrent and of 105 % for undercur-
rent functionality.
Minimum absolute dropout differential
Protection-class current transformer
Instrument current transformer
Times
Operate time with time delay = 0 ms
Dropout time
Frequency Operating Range
0.9 ≤ f/f
≤ 1.1
rated
10 Hz ≤ f < 0.9 f
1.1 f
< f ≤ 80 Hz
rated
f < 10 Hz
f > 80 Hz
89
OOT (Output Operating Time): additional delay of the output medium used, for example 5 ms with fast relays
1472
= 1 A
rated
= 5 A
rated
transformer
For I
N
ph-rated
For I
ph-rated
= 1 A
transformer
For I
N
ph-rated
For I
ph-rated
= 5 A
rated
0.030 A to 35.000 A
0.15 A to 175.00 A
= 1 A
0.001 A to 35.000 A
= 5 A
0.001 A to 175.000 A
= 1 A
0.005 A to 35.000 A
= 5 A
0.005 A to 175.000 A
2 to 10
0.00 s to 10.00 s
0.00 s to 100.00 s
1.00 s to 600.00 s
15 mA sec. (I
rated
75 mA sec. (I
rated
0.5 mA sec. (I
rated
2.5 mA sec. (I
rated
Approx. 25 ms + OOT
Approx. 23 ms + OOT at 60 Hz
Approx. 25 ms + OOT at 50 Hz
Approx. 22 ms + OOT at 60 Hz
According to specified tolerances
Slightly expanded tolerances
Active with less sensitivity
SIPROTEC 5, Overcurrent Protection, Manual
Increments of 0.001 A
Increments of 0.01 A
Increments of 0.001 A
Increments of 0.001 A
Increments of 0.001 A
Increments of 0.001 A
Increments of 1
Increments of 0.01 s
Increments of 0.01 s
Increments of 0.01 s
= 1 A) or
= 5 A)
= 1 A) or
= 5 A)
89
at 50 Hz
C53000-G5040-C017-8, Edition 07.2017
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