Siemens Siprotec 7UM611, Руководство пользователя

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4 Technical Data
328
7UM61 Manual
C53000-G1176-C127-3
4.14 Rate-of-Frequency-Change Protection df/dt (ANSI 81R)
Setting Ranges / Increments
Times
Dropout Ratios
Tolerances
Influencing Variables for Pickup Values
Stages, can be +df/dt> or –df/dt 4
Pickup values df/dt 0.1 to 10 Hz/s Increments 0.1 Hz/s
Delay times T 0.00 to 60.00 s Increments 0.01 s
or ineffective
Undervoltage Blocking U1> 10.0 to 125.0 V Increments 0.1 V
Window Length 1 to 25 cycles
Pickup Times df/dt Approx. 150 ms to 500 ms
(dep. on window length)
Dropout Times df/dt approx. 150 ms to 500 ms
(dep. on window length)
Dropout Difference
∆
f/dt 0.02 to 0.99 Hz/s (settable)
Dropout Ratio approx. 1.05
Frequency Rise
–Measuring Window < 5
approx. 5 % or 0.15 Hz/s at U > 0.5 U
N
– Measuring Window
≥
5 approx. 3 % or 0.1 Hz/s at U > 0.5 U
N
Undervoltage Blocking
1 % of setting value or 0.5 V
Delay Times 1 % or 10 ms
Power Supply DC Voltage in Range
0.8
≤
U
PS
/U
PSN
≤
1.15
≤
1 %
Temperature in Range
23
°
F or –5
°
C
≤ Θ
amb
≤
131
°
F or 55
°
C
≤
0.5 % / 10 K
Harmonics
- Up to 10 % 3rd harmonic
- Up to 10 % 5th harmonic
≤
1 %
≤
1 %
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