Technical Data
4.23 100-%-Stator Earth Fault Protection with 3rd Harmonics (ANSI 27/59TN 3rd Harm.)
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
498
4.23 100-%-Stator Earth Fault Protection with 3rd Harmonics
(ANSI 27/59TN 3rd Harm.)
Setting Ranges / Increments
Times
Dropout Ratios
Tolerances
Influencing Variables
Pickup value for 3rd harmonic in undervoltage stage
U
0 (3rd harmon.)
<
0.2 V to 40.0 V Increments 0.1 V
Pickup value for 3rd harmonic in overvoltage stage
U
0 (3rd harmon.)
>
0.2 V to 40.0 V Increments 0.1 V
Delay Time T
SEF (3rd HARM)
0.00 s to 60.00 s
or ∞ (ineffective)
Increments 0.01 s
Enabling conditions
P/P
min
> 10 % to 100 %
or 0 (ineffective)
Increments 1 %
U/U
1 min
> 50.0 V to 125.0 V
or 0 (ineffective)
Increments 0.1 V
Correction factor U
03h
(V/100%) for stage U
0(3rd harmon.)
> –40.0 to +40.0 Increments 0.1
Pickup Times approx. 80 ms
Dropout Times approx. 80 ms
Undervoltage stage U0 (3rd harmon.)< approx. 1.10 V or 0.1 V
Overvoltage stage U0 (3rd harmon.)> approx. 0.90 V or -0.1 V
Enabling conditions
P/P
min
> approx. 0.90
U/U
1 min
> approx. 0.95
Displacement Voltage 3 % of setting value or 0.1 V
Delay Time T
SEF (3rd HARM)
1 % of setting value or 10 ms
Power supply direct voltage in range 0.8 ≤ U
Aux
/U
AuxN
≤ 1.15 ≤ 1 %
Temperature in range 23.00 °F (–5 °C) ≤ Θ
amb
≤ 131.00 °F (55 °C) ≤ 0.5 % / 10 K
Frequency in range 0.95 ≤ f/f
N
≤ 1.05 ≤ 1 %
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