Intermittent Ground Fault Protection
Intermittent Ground Fault Protection
Pickup Threshold
with
Ι
N
for
Ι
Nom
= 1 A
for
Ι
Nom
= 5 A
0.05 A to 35.00 A
0.25 A to 175.00 A
Increments 0.01 A
Increments 0.01 A
with 3
Ι
0
for
Ι
Nom
= 1 A
for
Ι
Nom
= 5 A
0.05 A to 35.00 A
0.25 A to 175.00 A
Increments 0.01 A
Increments 0.01 A
with
Ι
Ns
for
Ι
Nom
= 1 A
for
Ι
Nom
= 5 A
0.005 A to 1.500 A
0.025 A to 7.500 A
Increments 0.001 A
Increments 0.001 A
Pickup extension time T
v
0.00 s to 10.00 s
Increments 0.01 s
Ground Fault Accumulation Time T
sum
0.00 s to 100.00 s
Increments 0.01 s
Reset Time for Accumulation T
res
1 s to 600 s
Increments 1 s
Number of Pickups for Intermittent Ground Fault 2 to 10
Increments 1
Times
Pickup Times
– Current = 1.25 x Pickup Value
– for ≥ 2 · Pickup Value
Dropout Time (without extension time)
approx. 30 ms
approx. 22 ms
approx. 22 ms
Tolerances
Pickup threshold
Ι
ie>
for
Ι
Nom
= 1 A 3 % of setting value or 10 mA
for
Ι
Nom
= 5 A 3 % of setting value or 50 mA
Times T
V
, T
sum
, T
res
1 % of setting value or 10 ms
Influencing Variables
Power supply direct voltage in range 0.8 ≤ V
PS
/V
PSNim
≤ 1.15
<1 %
Temperature in range 23.00 °F (-5 °C) ≤ Θ
amb
≤ 131.00 °F (55 °C)
<0.5 %/ K
Frequency in range 25 Hz to 70 Hz
<5 % relating to the set time
4.18
Technical Data
4.18 Intermittent Ground Fault Protection
SIPROTEC 4, 7SJ62/64, Manual
493
C53000-G1140-C207-8, Edition 08.2016
Summary of Contents for SIPROTEC 4
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