Sensitive Earth Fault Protection (Ansi 51Gn, 64R) - Siemens Siprotec 7UM62 Manual

4.22

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

Setting Ranges/
Resolutions
Inherent Operating
Times
Dropout
Tolerances
Influencing
Variables for
Pickup
7UM62 Manual
C53000-G1176-C149-3
Overcurrent pick-up
Delay Time
Overcurrent Pick-Up
Delay Time
Measured Value Supervision
when Used as Rotor Earth
Fault Protection
– Pickup Times
– Dropout Times
– Measured Value Supervision
Overcurrent Pick-Up
Measured Value Superv. I
Overcurrent Pick-Up
Delay Times T
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
Note: For the purpose of high sensitivity, the linear range of the measuring input for
the sensitive ground fault acquisition is from 2 mA to 1600 mA.
4.22 Sensitive Earth Fault Protection (ANSI 51GN, 64R)
I > 2 mA to 1000 mA
EE
T 0.00 s to 60.00 s
IEE>
or ∞ (does not expire)
I >> 2 mA to 1000 mA
EE
T 0.00 s to 60.00 s
IEE>>
or ∞ (does not expire)
I < 1.5 mA to 50.0 mA
EE
or 0.0 mA (ineffective)
Approx. 60 ms
Approx. 50 ms
Approx. 2 s
I >, I >> Approx. 0.95 or 1 mA
EE EE
< Approx. 1.10 or 1 mA
EE
1 % of setting value or 0.5 mA
1 % of setting value or 10 ms
≤ 1.15
1 %
0.3 % / 10 °F
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)
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