4.17
Intermittent Ground Fault Protection
Setting Ranges / Increments
Pickup Threshold
with IN
with 3I0
with INs
Pickup extension time T
Ground Fault Accumulation Time T
Reset Time for Accumulation T
Number of Pickups for Intermittent Ground
Fault
Times
Pickup Times
– Current = 1.25 x Pickup Value
– for ≥ 2 · Pickup Value
Dropout Time (without extension time)
Tolerances
Pickup threshold I
Times T
, T
V
sum
Influencing Variables
Power supply direct voltage in range 0.8 ≤ V
Temperature in range 23.00 °F (-5 °C) ≤ Θ
Frequency in range 0.95 ≤ f/f
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
for I
= 1 A
Nom
for I
= 5 A
Nom
for I
= 1 A
Nom
for I
= 5 A
Nom
v
sum
res
, T
res
amb
≤ 1.05
Nom
0.05 A to 35.00 A
0.25 A to 175.00 A
0.05 A to 35.00 A
0.25 A to 175.00 A
0.005 A to 1.500 A
0.00 s to 10.00 s
0.00 s to 100.00 s
1 s to 600 s
2 to 10
Approx. 30 ms
Approx. 22 ms
Approx. 22 ms
3 % of set value or 10 mA for I
or 50 mA for I
= 5 A
Nom
1 % of setting value or 10 ms
≤ 1.15
/V
<1 %
PS
PSNom
≤ 131.00 °F (55 °C) <0.5 %/ K
<5% relating to the set time
Technical Data
4.17 Intermittent Ground Fault Protection
Increments 0.01 A
Increments 0.01 A
Increments 0.01 A
Increments 0.01 A
Increments 0.001 A
Increments 0.01 s
Increments 0.01 s
Increments 1 s
Increments 1
= 1 A
Nom
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