Sensitive Earth Fault Protection (Ansi 51Gn, 64R) - Siemens Siprotec 7UM611 Manual

4.17

Sensitive Earth Fault Protection (ANSI 51GN, 64R)

Setting Ranges / Increments
Times
Dropout Ratios
Tolerances
Influencing Variables
7UM61 Manual
C53000-G1176-C127-3
Pickup Current I >
EE
Delay time T >
IEE
Pickup Current I >>
EE
Delay time T >>
IEE
Measuring circuit Supervision when Used as
Rotor Earth Fault Protection I
Pickup Times
Dropout Times
Measuring Circuit Supervision (Delay)
Pickup currents I >, I >>
EE EE
Measuring Circuit Supervision I
Pickup current
Time Delay
Power Supply DC Voltage in Range
0,8 ≤ U ≤ 1.15
/U
PS PSN
Temperature in Range
23°F or –5 °C ≤ Θ ≤ 131°F or 55 °C
amb
Frequency in Range
0,95 ≤ f/f ≤ 1.05
N
Harmonics
- Up to 10 % 3rd harmonic
- Up to 10 % 5th harmonic
Note: For the purpose of high sensitivity, the linear range of the measuring input for the sensi-
tive ground fault acquisition is from 2 mA to 1600 mA.
4.17 Sensitive Earth Fault Protection (ANSI 51GN, 64R)
2 mA to 1000 mA
0.00 s to 60.00 s
or ∞ (ineffective)
2 mA to 1000 mA
0.00 s to 60.00 s
or ∞ (ineffective)
1.5 mA to 50.0 mA or 0.0
< mA (ineffective)
EE
approx. 50 ms
approx. 50 ms
approx. 2 s
approx. 0.95 or 1 mA
< approx. 1.10 or 1 mA
EE
1 % of setting value or 0.5 mA
1 % of setting value or 10 ms
≤ 1 %
≤ 0.5 % / 10 K
≤ 1 %
≤ 1 %
≤ 1 %
Increments 1 mA
Increments 0.01 s
Increments 1 mA
Increments 0.01 s
Increments 0.1 mA
331