Siemens SIPROTEC 4 7SJ61 - Ground Fault Detection (Sensitive;Insensitive)

Ground Fault Detection (Sensitive/Insensitive)
Ground Fault Pickup for All Types of Ground Faults (Definite Time Characteristic)
Pickup current 50Ns-2 PICKUP
for sensitive transformer
for normal 1-A transformer
for normal 5-A transformer
0.001 A to 1.500 A
0.05 A to 35.00 A
0.25 A to 175.00 A
Increments
0.001 A
Increments
0.01 A
Increments
0.05 A
Time Delay 50Ns-2 DELAY 0.00 s to 320.00 s or ∞ (disabled) Increments
0.01 s
Pickup current 50Ns-1 PICKUP
for sensitive transformer
for normal 1-A transformer
for normal 5-A transformer
0.001 A to 1.500 A
0.05 A to 35.00 A
0.25 A to 175.00 A
Increments
0.001 A
Increments
0.01 A
Increments
0.05 A
Time Delay 50Ns-1 DELAY 0.00 s to 320.00 s or ∞ (disabled) Increments
0.01 s
Dropout Time Delay 50Ns T DROP-OUT 0.00 s to 60.00 s Increments 0.01
s
Operating Time ≤ 50 ms (non-directional)
≤ 50 ms (directional)
Dropout Ratio
approx. 0.95 for Ι
Ns
> 50 mA
Measurement Tolerance 2 % of setting value or 1 mA
Operating Time Tolerance 1 % of setting value or 20 ms
Ground Fault Pickup for All Types of Ground Faults (Inverse Time Characteristic)
User-defined Curve (defined by a maximum of 20 value pairs of current and time delay)
Pickup Current 51Ns
for sensitive transformer
for normal 1-A transformer
for normal 5-A transformer
0.001 A to 1.400 A
0.05 A to 4.00 A
0.25 A to 20.00 A
Increments
0.001 A
Increments
0.01 A
Increments
0.05 A
Time multiplier T
Ι51Ns
0.10 s to 4.00 s or ∞ (disabled) Increments
0.01 s
Pickup Threshold
approx. 1.10 · Ι
51Ns
Dropout ratio
approx. 1.05 · Ι
51Ns
for Ι
51Ns
> 50 mA
Measurement Tolerance 2 % setting value or 1 mA
Operating Time Tolerance in Linear Range
7 % of reference value for 2 ≤ Ι/Ι
51Ns
≤ 20 + 2 % current
tolerance, or 70 ms
4.13
Technical Data
4.13 Ground Fault Detection (Sensitive/Insensitive)
SIPROTEC 4, 7SJ61, Manual 317
C53000-G1140-C210-6, Edition 05.2016