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4.22
Sensitive Earth Fault Protection (ANSI 51GN, 64R)
Setting Ranges / Increments
Pickup current I
Delay Time T
Pickup current I
Delay time T
IEE
Measuring circuit supervision when used as rotor earth
fault protection I
Times
Pickup Times
Dropout Times
Measuring Circuit Supervision (Delay)
Dropout Ratios
Pickup current I
Measuring circuit supervision I
Tolerances
Pickup current
Time Delay
Influencing Variables
Power supply direct voltage in range 0.8 ≤ U
Temperature in range 23.00 °F (–5 °C) ≤ Θ
Frequency in range 0.95 ≤ f/f
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 sensitive earth fault
acquisition is from 2 mA to 1600 mA.
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
>
EE
>
IEE
>>
EE
>>
<
EE
>, I
>>
EE
EE
<
EE
≤ 1.05
N
4.22 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)
approx. 50 ms
approx. 50 ms
approx. 2 s
approx. 0.95 or 1 mA
approx. 1.10 or 1 mA
1 % of setting value or 0.5 mA
1 % of setting value or 10 ms
/U
≤ 1.15
≤ 1 %
Aux
AuxN
≤ 131.00 °F (55 °C)
≤ 0.5 % / 10 K
amb
≤ 1 %
≤ 1 %
≤ 1 %
Technical Data
Increments 1 mA
Increments 0.01 s
Increments 1 mA
Increments 0.01 s
Increments 0.1 mA
497
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