Ground Fault Detection 64, 50Ns, 51Ns, 67Ns - Siemens siprotec SJ62 User Manual

4 Technical Data
4.15

Ground Fault Detection 64, 50Ns, 51Ns, 67Ns

Displacement Voltage Element Characteristics - For all Types of Ground Faults
Phase Detection for Ground Faults on an Ungrounded System
Ground Fault Pickup for All Types of Ground Faults (Definite Time Characteristic)
493
Displacement Voltage, Measured
Displacement Voltage, Calculated
Pickup delay T-DELAY Pickup
Additional pickup delay 64-1 DELAY
Operating Time
Dropout Value
Measurement Tolerance
V > (measured)
N
3V0> (calculated)
Operating Time Tolerances
Measuring Principle
V (Ground Fault Phase)
PHASE MIN
V (Healthy Phase)
PHASE MAX
Measurement Tolerance acc. to VDE 0435,
Part 303
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
VN> 1.8 V to 170.0 V
(7SJ62/63)
VN> 1.8 V to 200.0 V
(7SJ64)
3V > 10.0 V to 225.0 V
0
0.04 s to 320.00 s or ∞
0.10 s to 40000.00 s or ∞
(disabled)
Approx. 60 ms
0.95 or (pickup value – 0.6 V)
3 % of setting value or 0.3 V
3 % of setting value or 3 V
1 % of setting value or 10 ms
voltage measurement (phase-to-ground)
10 V to 100 V
10 V to 100 V
3 % of setting value or 1 V
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
≤ 60 ms (non-directional)
≤ 80 ms (directional)
Approx. 0.95 for 50Ns >50 mA
2 % of setting value or 1 mA
1 % of setting value or 10 ms
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
Increments 0.1V
Increments 0.1V
Increments 0.01 s
Increments 0.01 s
Increments 1V
Increments 1V
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