Technical Data
4.33 DC Voltage/Current Protection (ANSI 59NDC/51NDC)
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
509
4.33 DC Voltage/Current Protection (ANSI 59NDC/51NDC)
Setting Ranges / Increments
Times
Dropout Ratios
Tolerances
Influencing Variables for Pickup Values
Voltage increase U≥ 0.1 V to 8.5 V Increments 0.1V
Voltage Decrease U≤ 0.1 V to 8.5 V Increments 0.1V
Current Increase I≥ 0.2 mA to 17.0 mA Increments 0.1 mA
Current Decrease I≤ 0.2 mA to 17.0 mA Increments 0.1 mA
For Measurement of Sinusoidal Voltages 0.1 V
rms
to 7.0 V
rms
Increments 0.1 V
rms
For Measurement of Sinusoidal Currents 0.2 mA to 14.0 mA Increments 0.1 mA
Delay Time T
DC
0.00 s to 60.00 s
or ∞ (ineffective)
Increments 0.01 s
The set times are pure delay times.
Pickup Times
Increase U>, I>
in Operating State 1
in Operating State 0
≤ 60 ms
≤ 200 ms
at f = f
N
Decrease U<, I<
in Operating State 1
in Operating State 0
≤ 60 ms
≤ 200 ms
at f = f
N
Dropout Times Same as pickup times
Voltage Increase U≥ approx. 0.95 or -0.05 V
Voltage Decrease U≤ approx. 1.05 or +0.05 V
Current Increase I≥ approx. 0.95 or. –0.15 mA
Current Decrease I≤ approx. 1.05 or +0.15 mA
Voltage Limits 1 % of setting value or 0.1 V
Current Thresholds 1 % of setting value or 0.1 mA
Delay Time T 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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