Siemens SIPROTEC 7UM62, Manual

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