Ground Fault Detection (Sensitive/Insensitive)
Displacement Voltage Pickup for All Types of Ground Faults
Displacement voltage, measured
V
0
> 1.8 V to 170.0 V or
∞(disabled) (7SJ62)
V
0
> 0.4 V to 200.0 V or
∞(disabled) (7SJ64)
Increments
0.1 V
Displacement voltage, calculated
3V
0
> 10.0 V to 225.0 V
Increments
0.1 V
Pickup delay
T-DELAY Pickup
0 s to 320.00 s or ∞
Increments
0.01 s
Additional tripping delay
64-1 DELAY
0.10 s to 40000.00 s or ∞ (disabled)
Increments
0.01 s
Operating time
approx. 50 ms
Dropout value
0.95 or (pickup value – 0.6 V)
Measurement tolerance
V
0
> (measured)
3V
0
> (calculated)
3 % of setting value or 0.3 V
3 % of setting value or 3 V
Operating time tolerances
1 % of setting value or 10 ms
Phase Detection for Ground Faults on an Ungrounded System
Measuring Principle
Voltage measurement (phase-ground)
V
PHASE MIN
(Ground Fault Phase)
10 V to 100 V
Increments 1 V
V
PHASE MAX
(Healthy Phase)
10 V to 100 V
Increments 1 V
Measurement Tolerance acc. to VDE 0435, Part
303
3 % of setting value or 1 V
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
4.17
Technical Data
4.17 Ground Fault Detection (Sensitive/Insensitive)
484
SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016
Summary of Contents for SIPROTEC 4
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