Ground Fault Detection (Sensitive/Insensitive) - Siemens 7SC80 Manual

Technical Data

4.15 Ground Fault Detection (Sensitive/Insensitive)

4.15 Ground Fault Detection (Sensitive/Insensitive)
Displacement Voltage Element For all Types of Ground Faults
Displacement voltage, measured
Displacement voltage, calculated
Pickup delay T-DELAY Pickup
Additional tripping delay 64-1 DELAY
Operating time
Dropout value
Measurement tolerance
Ve> (measured)
3V0> (calculated)
Operating time tolerances
Phase Detection for Ground Faults on an Ungrounded System
Measuring Principle
V (Ground Fault Phase)
PHASE MIN
V (Healthy Phase)
PHASE MAX
Measurement Tolerance acc. to VDE 0435, Part
303
Ground Fault Pickup for All Types of Ground Faults (Definite Time Characteristic)
Pickup current 50Ns-2 PICKUP, 50Ns-1 PICKUP
for sensitive 1 A transformer
for sensitive 5 A transformer
for normal 1 A transformer
for normal 5 A transformer
Time delay50Ns-2 DELAY, 50Ns-1 DELAY
Dropout time delay 50Ns T DROP-OUT
Operating time
Dropout ratio
Measurement tolerance
sensitive
non-sensitive
Operating time tolerance
546
Ven> 1.8 V to 200.0 V
3V > 5.0 V bis 225.0 V
0
0.04 s to 320.00 s or ∞
0.10 s to 40000.00 s or ∞ (disa-
bled)
approx. 50 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-ground)
10 V to 100 V
10 V to 100 V
3 % of setting value or 1 V
0.001 A to 1.600 A
0.005 A to 8.000 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 ΙNs > 50 mA
for Ι = 1 A 3 % of setting value or 1 mA
Nom
= 5 A 3 % of setting value or 5 mA
Ι
Nom
for setting values < 10 mA ca. 20 %
= 1 A 3 % of setting value or 15 mA
for Ι
Nom
for Ι = 5 A 3 % of setting value or 75 mA
Nom
1 % of setting value or 10 ms
E50417-G1140-C486-A8, Edition 07.2017
Increments 0.1 V
Increments 0.1 V
Increments 0.01 s
Increments 0.01 s
Increments 1 V
Increments 1 V
Increments 0.001 A
Increments 0.005 A
Increments 0.01 A
Increments 0.05 A
Increments 0.01 s
Increments 0.01 s
SIPROTEC Compact, 7SC80, Manual