Siemens SIPROTEC 7UM62, Manual

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4 Technical Data
422
7UM62 Manual
C53000-G1176-C149-3
4.9 Earth Current Differential Protection (ANSI 87GN/TN)
Setting Ranges/
Resolution Differential Current I-REF> I/InO 0.05 to 2.00 (Increments 0.01)
Characteristic: Basepoint I/InO 0.05 to 2.00
Characteristic: Slope 0.00 to 0.95 (Increments 0.01)
Delay Times T 0.00 to 60.00 (Increments 0.01 s)
or
∞
(does not expire)
Phase Current Blocking I> I/InO 1.0 to 2.5 (Increments 0.1)
Zero Voltage Release U0> 1.0 to 100.0 (Increments 0.1 V)
oder disabled
Inherent Operating
Times Pickup Times Approx. 25 to 55 ms
Dropout Times Approx. 60 ms
Dropout Pickup Characteristic Approx. 0.90
Dropout/Pickup Ratio Approx. 0.95
Tolerances Pickup Characteristic 5 % of setpoint value or 0.02 I/InO
Phase Current Blocking I> 1 % of setting value or 0.01 I/InO
Zero Voltage Release U0> 1 % of setting value or 0.5 V
Delay Times T 1 % of setting value or 10 ms
Influencing
Variables for
Pickup Power Supply Direct Voltage in Range
0.8
≤
U
H
/U
HN
≤
1.15
≤
1 %
Temperature in Range
–5 °C
≤ ϑ
amb
≤
55 °C
≤
0.5 %/10 K
Frequency in Range
0.95
≤
f/f
N
≤
1.05
≤
1 %
Harmonics
– Up to 10 % 3rd Harmonics
≤
1 %
– Up to 10 % 5th Harmonics
≤
1 %