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4 Technical Data
4.13
Impedance Protection (ANSI 21)
Overcurrent Fault
Detection
Impedance
Measurement
Power Swing
Blocking
Times
Influencing
Variables for
Pickup
426
Pickup Current
Drop-Off ratio
Measuring Tolerances acc.to
VDE 0435 part 303
Undervoltage Seal-In U<
Drop-Off ratio
1
) For I
= 1 A, divide all limits and increments by 5.
N
Characteristic
Impedance Z1 (Based on I
Impedance Z1B (Based on I
Impedance Z2 (Based on I
Measuring Tolerances as per
VDE0435 part 303
with Sinusoidal Quantities
2
) Secondary values for I
always 0.01 Ω.
Difference Power Swing Polygon/
Trip Polygon (Based onI
Rate of Change dz/dt
2
(Based onI
= 1 A
)
N
Power Swing Blocking Action Time
2
) Secondary values for I
always the same.
Delay Times
Shortest Tripping Time
Typical Tripping Time
Dropout Time
Holding Time of Undervoltage Seal-In
Time Expiry Tolerances
Power Supply Direct Voltage in Range
0.8 ≤ U
/ U
PS
PS nominal
Temperature in Range
23 °F ≤ ϑ
≤ 131 °F
amb
–5 °C ≤ ϑ
≤ 55 °C
amb
Frequency in Range
0.95 ≤ f/f
≤ 1.05
N
Harmonic Currents
– Up to 10 % 3rd Harmonics
– Up to 10 % 5th Harmonics
IMP I>
0.50 A to 100.00 A
Approx. 0.95
1 % of set value or 50 mA
10.0 V to 125.0 V
Approx. 1.05
Polygonal, 3 independent stages
2
0.01 Ω to 26.00 Ω
= 5 A
)
N
0.01 Ω to 13.00 Ω
2
= 5 A
)
N
2
0.01 Ω to 13.00 Ω
= 5 A
)
N
ê∆Z/Z ê ≤ 5 % for 30° ≤ ϕ
= 5 A; for I
= 1 A multiply all values by 5; the increment is
N
N
0.10 Ω to 30.00 Ω
2
= 1 A
)
N
1.0 Ω/s to 600.0 Ω/s (Increments 0.1 Ω/s)
0.00 s to 60.00 s
= 1 A, for I
= 5 A devided all values by 5; the increment is
N
N
T
0.00 s to 60.00 s
35 ms
Approx. 40 ms
Approx. 50 ms
0.10 s to 60.00 s
1 % of set value or 10 ms
≤ 1.15
1 %
0.3 % / 10 °F
0.5 % / 10 K
< 1 %
< 1 %
< 1 %
1
1
) (Increm. 0.05 A)
)
1
)
(Increments 0.1 V)
2
) (Increments 0.01 Ω)
) (Increments 0.01 Ω)
2
2
) (Increments 0.01 Ω)
≤ 90° or 10 mΩ
K
(Increments 0.01 Ω)
(Increments 0.01 s)
(Increments 0.01 s)
(Increments 0.01 s)
7UM62 Manual
C53000-G1176-C149-3
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