Siemens siprotec 7SD5

4 Technical Data
542
7SD5 Manual
C53000-G1176-C169-1
Inverse Time Overcurrent Stage (IEC)
Inverse Time Overcurrent Stage (ANSI)
Inverse Time Overcurrent Stage with Logarithmic-inverse Characteristic
Pickup time (fast relays/high-speed relays)
(1.5 set value)
(2.5 set value)
approx. 40/35 ms
approx. 30/25 ms
Dropout time Approx. 30 ms
Tolerances Current 3 % of setting value or 1 % nominal current
Time 1 % of setting value or 10 ms
The set times are pure delay times
Pickup value 3I
0P
for I
N
= 1 A 0.05 A to 25.00 A
or
0.003 A to 25.000 A
Increments 0.01 A
Increments 0.001 A
for I
N
= 5 A 0.25 A to 125.00 A
or
0.015 A to 125.000 A
Increments 0.01 A
Increments 0.001 A
Time Factor D
3I0P
0.05 s to 3.00 s
or ∞ (ineffective)
Increments 0.01 s
Additional time delay T
3I0P add
0.00 s to 30.00 s
or ∞ (ineffective)
Increments 0.01 s
Characteristics See Figure 4-1
Tolerances Current Pickup at 1.05 ≤ I/3I
0P
≤ 1.15
Time 5 % ± 15 ms for 2 ≤ I/3I
0P
≤ 20 and T
3I0P
/s ≥ 1
Pickup value 3I
0P
for I
N
= 1 A 0.05 A to 25.00 A
or
0.003 A to 25.000 A
Increments 0.01 A
Increments 0.001 A
for I
N
= 5 A 0.25 A to 125.00 A
or
0.015 A to 125.000 A
Increments 0.01 A
Increments 0.001 A
Time Factor D
3I0P
0.50 s to 15.00 s
or ∞ (ineffective)
Increments 0.01 s
Additional time delay T
3I0P add
0.00 s to 30.00 s
or ∞ (ineffective)
Increments 0.01 s
Characteristics See Figure 4-2 and 4-3
Tolerances Current Pickup at 1.05 ≤ I/3I
0P
≤ 1.15
Time 5 % ± 15 ms for 2 ≤ I/3I
0P
≤ 20 and D
3I0P
/s ≥ 1
Pickup value 3I
0P
for I
N
= 1 A 0.05 A to 25.00 A
or
0.003 A to 25.000 A
Increments 0.01 A
Increments 0.001 A
for I
N
= 5 A 0.25 A to 125.00 A
or
0.015 A to 125.000 A
Increments 0.01 A
Increments 0.001 A
Start Current Factor 3I
0P FACTOR
1.0 to 4.0 Increments 0.1
Time Factor D
3I0P
0.05 s to 15.00 s; ∞ Increments 0.01 s
Maximum Time T
3I0P max
0.00 s to 30.00 s Increments 0.01 s
Minimum Time T
3I0P min
0.00 s to 30.00 s Increments 0.01 s
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