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

4.13

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