Stator Earth Fault Protection With 20 Hz Voltage Injection (Ansi 64G - 100%) - Siemens SIPROTEC 7UM62 Manual

4.24 100-%-Stator Earth Fault Protection with 20 Hz Voltage Injection
(ANSI 64G - 100%)
Setting Ranges / Increments
Alarm Stage R
Tripping Stage R
Earth currrent stage I
Time Delay
Failure Monitoring 20 HZ Generator
U20
I20
Correction Angle
Times
Pickup Time R
Pickup Time I
Dropout Times R
Dropout Times I
Dropout Ratios
Dropout Ratio
Tolerances
Resistance
Current
Time Delay
Influencing Variables for Pickup Values
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
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010

4.24 100-%-Stator Earth Fault Protection with 20 Hz Voltage Injection (ANSI 64G - 100%)

<
SEF
<<
SEF
>
SEF
<, R <<
SEF SEF
>
SEF
<, R <<
SEF SEF
>
SEF
≤ 1.05
N
20 Ω to 700 Ω
20 Ω to 700 Ω
0.02 A to 1.50 A
0.00 s to 60.00 s
or ∞ (ineffective)
0.3 V to 15 V
5 mA to 40 mA
-60° to +60°
≤ 1.3 s
≤ 250 ms
≤ 0.8 s
≤ 120 ms
Approx. 1.2 to 1.7
approx. 5 % or 2 Ω
3 % or 3 mA
1 % 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 Ω
Increments 1 Ω
Increments 0.01 A
Increments 0.01 s
Increments 0.1V
Increments 1 mA
Increments 1°
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