Table 75. Reverse power/directional overpower protection (DOPPDPR)
Characteristic Value
Operation accuracy
1)
Depending on the frequency of the measured current and voltage:
f = f
n
±2 Hz
Power measurement accuracy ±3% of the set value or ±0.002 × S
n
Phase angle: ±2°
Start time
2)3)
Typically 45 ms
Reset time Typically 30 ms
Reset ratio Typically 0.94
Operate time accuracy ±1.0% of the set value of ±20 ms
Suppression of harmonics -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
1)
Measurement mode
= “Pos Seq” (default)
2) U = U
n
, f
n
= 50 Hz, results based on statistical distribution of 1000 measurements
3) Includes the delay of the signal output contact
Table 76. Reverse power/directional overpower protection (DOPPDPR) main settings
Parameter
Function Value (Range) Step
Start value DOPPDPR 0.01...2.00 × S
n
0.01
Operate delay time DOPPDPR 40...300000 ms 10
Directional mode DOPPDPR 2 = Forward
3 = Reverse
-
Power angle DOPPDPR -90...90° 1
Table 77. Three-phase under excitation protection (UEXPDIS)
Characteristic
Value
Operation accuracy Depending on the frequency of the measured current and voltage:
f = f
n
± 2 Hz
±3.0% of the set value or ±0.2% Zb
Start time
1)2)
Typically 45 ms
Reset time Typically 30 ms
Reset ratio Typically 1.04
Retardation time Total retardation time when the impedance returns from the operating
circle <40 ms
Operate time accuracy ±1.0% of the set value or ±20 ms
Suppression of harmonics -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
1) f
n
= 50Hz, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
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