Siemens siprotec 7SD5 User Manual page 543

Additional time delay T
3I0P add
Characteristics
Tolerances
Times
Zero Sequence Voltage Time Protection Stage (U0-inverse)
Pickup value 3I
0P
Pickup value 3U >
0
Voltage factor U
0 inv. minimal
Additional time delay
Characteristics
Tolerances times
Dropout Ratio
The set times are pure delay times
Zero Sequence Power Protection Stage
Pickup value 3I
0P
Pickup value S FORWARD
for I = 1 A
N
for I = 5 A
N
Additional time delay T
3I0P add
Characteristics
Tolerances pickup values
Tolerances times
Inrush Restraint
Second harmonic content for inrush
Inrush blocking is cancelled above
Inrush restraint may be switched effective or ineffective for each individual stage.
7SD5 Manual
C53000-G1176-C169-1
4.8 Earth Fault Protection in Earthed Systems (optional)
0.00 s to 30.00 s
or ∞ (ineffective)
See Figure 4-4
5 % ± 15 ms for 2 ≤ I/3I
inv.
def. 1 % of setting value or 10 ms
for I = 1 A 0.05 A to 25.00 A
N
or
0.003 A to 25.000 A
for I = 5 A 0.25 A to 125.00 A
N
or
0.015 A to 125.000 A
1.0 V to 10.0 V
0.1 V to 5.0 V
T 0.00 s to 32.00 s
directional
T 0.00 s to 32.00 s
non-direction-
al
See Figure 4-5
1 % of setting value or 10 ms
Current Approx. 0.95 for I/I
Voltage Approx 0.95 for 3U
for I = 1 A 0.05 A to 25.00 A
N
0.003 A to 25.000 A
for I
= 5 A 0.25 A to 125.00 A
N
0.015 A to 125.000 A
0.1 VA to 10.0 VA
0.5 VA to 50.0 VA
0.00 s to 30.00 s; ∞
See Figure 4-6
1 % of set value at sensitive earth current transformer
5 % of set value or 15 ms at sensitive earth current transformer
6 % of set value or 15 ms at normal earth current transformer
/ without earth current transformer
10 % to 45 %
Referred to fundamental wave
for I = 1 A 0.50 A to 25.00 A
N
for I = 5 A 2.50 A to 125.00 A
N
Increments 0.01 s
≤ 20 and T /s ≥ 1
0P 3I0P
Increments 0.01 A
Increments 0.001 A
Increments 0.01 A
Increments 0.001 A
Increments 0.1 V
Increments 0.1 V
Increments 0.01 s
Increments 0.01 s
≥ 0.5
N
≥ 1 V
0
Increments 0.01 A
Increments 0.001 A
Increments 0.01 A
Increments 0.001 A
Increments 0.1 VA
Increments 0.01 s
Increments 1 %
Increments 0.01 A
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