Sensitive Ground-Fault Detection
General
Setting Values
Decay time V0 0.06 s to 0.20 s Increments of 0.01 s
Dropout delay 0.00 s to 60.00 s Increments of 0.01 s
Core balance
current transformer
current 1
Core balance
current transformer
current 2
Protection-class
current trans-
formers
For I
ph-rated
= 1 A 0.030 A to
35.000 A
Increments of 0.001 A
For I
ph-rated
= 5 A 0.15 A to 175.00 A Increments of 0.01 A
For I
N
transformer
type sensitive and
I
N-rated
= 1 A
For I
ph-rated
= 1 A 0.001 A to
35.000 A
Increments of 0.001 A
For I
ph-rated
= 5 A 0.001 A to
175.000 A
Increments of 0.001 A
For I
N
transformer
type sensitive and
I
N-rated
= 5 A
For I
ph-rated
= 1 A 0.005 A to
35.000 A
Increments of 0.001 A
For I
ph-rated
= 5 A 0.005 A to
175.000 A
Increments of 0.001 A
Core balance current transformer angle correction F1
Core balance current transformer angle correction F2
0.0° to 5.0° Increments of 0.1°
Times
Pickup times
Approx. 25 ms + OOT
91
at 50 Hz
Approx. 23 ms + OOT at 60 Hz
Dropout times Approx. 25 ms + OOT at 50 Hz
Approx. 22 ms + OOT at 60 Hz
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
92
f < 10 Hz
f > 80 Hz
Active with less sensitivity
93
Tolerances
Currents
-3I0 via sensitive current transformer:
1 % of the setting value or 0.1 mA (I
rated
= 1.6 A)
or 0.5 mA (I
rated
= 8 A, f
rated
± 10 %)
-3I0 via protection-class current transformers:
1 % of the setting value or 5 mA (I
rated
= 1 A)
or 25 mA (I
rated
= 5 A, f
rated
± 10 %)
Voltages 1 % of the setting value or 0.05 V
Times 1 % of the setting value or ±10 ms
12.18
12.18.1
91
OOT (Output Operating Time): additional delay of the output medium used, for example 5 ms with fast relays
92
Transient ground-fault stage is inactive
93
Transient ground-fault stage is inactive
Technical Data
12.18 Sensitive Ground-Fault Detection
1476 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
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