Siemens SIPROTEC 7SJ80

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 3Ι0 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
Ιie>
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
4.15
Technical Data
4.15 Intermittent Ground Fault Protection
SIPROTEC 4, 7SJ80, Manual 401
E50417-G1140-C343-A8, Edition 12.2017