4 Technical Data
324
7UM61 Manual
C53000-G1176-C127-3
4.11 Overvoltage Protection (ANSI 59)
Setting Ranges / Increments
Times
Tolerances
Influencing Variables
Measured Quantity Maximum of the phase-to-phase voltages, calcu-
lated from the phase-to-earth voltages
Pickup thresholds U<, U<<, Up< 30.0 V to 170.0 V Increments 0.1V
Dropout ratio RV U<
(Stages U>, U>>)
0.90 to 0.99 Increments 0.01
Time Delays T U>, T U>> 0.00 s to 60.00 s
or ∞ (ineffective)
Increments 0.01
s
The set times are pure delay times.
Pickup Times U>, U>> approx. 50 ms
Dropout times U>, U>> approx. 50 ms
Pickup Voltage Limits 1 % of setting value or 0.5 V
Delay times T 1 % of setting value 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
Frequency in Range
0,95 ≤ f/f
N
≤ 1.05
≤ 1 %
Harmonics
– Up to 10 % 3rd harmonic
– Up to 10 % 5th harmonic
≤ 1 %
≤ 1 %
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