Siemens SIPROTEC 7UM62, Manual

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4.14 Out-of-Step Protection (ANSI 78)
427
7UM62 Manual
C53000-G1176-C149-3
4.14 Out-of-Step Protection (ANSI 78)
Pickup Positive Sequence Component I
1
>/I
N
20.0 % to 400.0 % (Increm. 0.1 %)
Negative Sequence ComponentI
2
</I
N
5.0 % to 100.0 % (Increm. 0.1 %)
Dropout/Pickup Ratios
– I
1
> Approx. 0.95
– I
2
< Approx. 1.05
Measuring Tolerances acc. to 3 % of setting value
VDE 0435 Part 303
Power Swing
Polygon Impedance Za (based on I
N
= 5 A
1
) 0.04
Ω
to 26.00
Ω
1
) (Increm. 0.01
Ω
)
Impedance Zb (based on I
N
= 5 A
1
) 0.02
Ω
to 26.00
Ω
1
) (Increm. 0.01
Ω
)
Impedance Zc (based on I
N
= 5 A
1
) 0.02
Ω
to 26.00
Ω
1
) (Increm. 0.01
Ω
)
Impedance Zd–Zc (based on I
N
= 5 A
1
) 0.00
Ω
to 26.00
Ω
1
) (Increm. 0.01
Ω
)
Angle of Inclination of the Polygon 60.0° to 90.0° (Increments 0.1°)
Number of Permissible Power Swings
Characteristic 1 1 to 4
Characteristic 2 1 to 8
Measuring Tolerances acc. to VDE 0435
ê
∆
Z/Z
ê
≤
5 % for 30°
≤ ϕ
K
≤
90° or 10 m
Ω
with Sinusoidal Quantities
1
) Secondary values for I
N
= 5 A; for I
N
= 1 A multiply all values by 5; the increment is
always 0.01
Ω
.
Times Holding Time of Pickup T
H
0.20 s to 60.00 s (Increments 0.01 s)
Holding Time of Out-of-Step
Annunciation
0.02 s to 0.15 s (Increments 0.01 s)
Delay Time Tolerances 1 % of setting value or 10 ms
Influencing
Variables for
Pickup Power Supply Direct Voltage in Range
0.8
≤
V
PS
/ V
PS nominal
≤
1.15 1 %
Temperature in Range
23 °F
≤ ϑ
amb
≤
131 °F 0.3 % / 10 °F
–5 °C
≤ ϑ
amb
≤
55 °C 0.5 % / 10 K
Frequency in Range
0.95
≤
f/f
N
≤
1.05 < 1 %
Harmonic Currents
– Up to 10 % 3rd Harmonics
< 1 %
– Up to 10 % 5th Harmonics < 1 %