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4.14
Out-of-Step Protection (ANSI 78)
Pickup
Positive sequence current I
Negative sequence current I
Dropout ratios
- I
>
1
- I2<
Measuring tolerances acc. to VDE 0435
Part 303
Power Swing Polygon
Impedance Za (secondary)
Impedance Za (secondary
Impedance Zb (secondary)
Impedance Zb (secondary)
Impedance Zc (secondary)
Impedance Zc (secondary)
Impedance Zd-Zc (secondary)
Impedance Zd-Zc (secondary)
Angle of Inclination of the Polygon
Number of permissible power swings
- on crossing characteristic 1
- on crossing characteristic 2
Measuring tolerances acc. to VDE 0435
with sinusoidal quantities
Times
Pickup Seal-In Time T
Holding Time of Out-of-Step Indication
Delay Time Tolerances
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
>/I
1
N
</I
2
N
for I
= 1 A
N
for I
= 5 A
N
for I
= 1 A
N
for I
= 5 A
N
for I
= 1 A
N
for I
= 5 A
N
for I
= 1 A
N
for I
= 5 A
N
H
Aux
≤ 131.00 °F (55 °C)
amb
≤ 1.05
N
20.0 % to 400.0 %
5.0 % to 100.0 %
approx. 0.95ms
approx. 1.05
3 % of setting value
0,20 Ω up to 130.00 Ω
0,04 Ω up to 26.00 Ω
0,10 Ω up to 130.00 Ω
0,02 Ω up to 26.00 Ω
0,10 Ω up to 130.00 Ω
0,02 Ω up to 26.00 Ω
0,00 Ω up to 130.00 Ω
0,00 Ω up to 26.00 Ω
60.0° to 90.0°
1 to 10
1 to 20
|ΔZ/Z| ≤ 5 % for 30° ≤ ϕ
K
0.20 s to 60.00 s
0.02 s to 0.15 s
1 % of setting value or 10 ms
/U
≤ 1.15
≤ 1 %
AuxN
≤ 0.5 % / 10 K
≤ 1 %
≤ 1 %
≤ 1 %
Technical Data
4.14 Out-of-Step Protection (ANSI 78)
Increments 0.1 %
Increments 0.1 %
Increments 0.01 Ω
Increments 0.01 Ω
Increments 0.01 Ω
Increments 0.01 Ω
Increments 0.1°
≤ 90° or 10 mΩ
Increments 0.01 s
Increments 0.01 s
487
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