Impedance Protection (Ansi 21) - Siemens Siprotec 7UM611 Manual

4 Technical Data
4.9

Impedance Protection (ANSI 21)

Pickup
Impedance Measurement
Times
Influencing Variables for Pickup Values
322
Pickup current IMP I> for I
for I
Dropout Ratio
Measuring Tolerances for I
acc. to VDE 0435
for I
Undervoltage Seal-In U<
Dropout Ratio
Characteristic
Impedance Z1 (secondary, Based on I
1 A)
Impedance Z1 (secondary, Based on I
5 A)
Impedance Z1B (secondary, Based on I
= 1 A)
Impedance Z1B (secondary, Based on I
= 5 A)
Impedance Z2 (secondary, Based on I
1 A)
Impedance Z2 (secondary, Based on
I = 5 A)
N
Measuring Tolerances as per VDE0435
part 303 with Sinusoidal Quantities
Delay Times
Shortest Tripping Time
Typical Tripping Time
Dropout Time
Holding Time of Undervoltage Seal-In
Delay Time Tolerances
Auxiliary DC voltage in range
0.8 ≤ U ≤ 1.15
/U
Aux AuxN
Temperature in Range
23°F or –5 °C ≤ Θ ≤ 131°F or 55 °C
amb
Frequency in Range 0.95 ≤ f/f
Harmonics
- Up to 10 % 3rd harmonic
- Up to 10 % 5th harmonic
= 1 A 0.10 A to 20.00 A
N
= 5 A 0.50 A to 100.00 A
N
approx. 0.95
= 1 A 1 % of setting value or 10 mA
N
= 5 A 1 % of setting value or 50 mA
N
10.0 V to 125.0 V
approx. 1.05
Polygonal, 3 independent stages
0,05 Ω up to 130.00 Ω
=
N
0,01 Ω up to 26.00 Ω
=
N
0,05 Ω up to 65.00 Ω
N
0,01 Ω up to 13.00 Ω
N
0,05 Ω up to 65.00 Ω
=
N
0,01 Ω up to 13.00 Ω
|∆Z/Z| ≤ 5 % for 30° ≤ ϕ
0.00 s to 60.00 s
35 ms
approx. 40 ms
approx. 50 ms
0.10 s to 60.00 s
1 % of setting value or 10 ms
≤ 1 %
≤ 0.5 % / 10 K
≤ 1.05 ≤ 1 %
N
≤ 1 %
≤ 1 %
Increments 0.01 A
Increments 0.05 A
Increments 0.1 %
Increments 0.1 V
Increments 0.01 Ω
Increments 0.01 Ω
Increments 0.01 Ω
≤ 90° or 10 mΩ
K
Increments 0.01 s
Increments 0.01 s
7UM61 Manual
C53000-G1176-C127-3