Table 118. 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 119. 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 120. Underpower protection (DUPPDPR)
Characteristic
Value
Operation accuracy
1)
Depending on the frequency of the measured current and voltage:
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 1.04
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
1MRS759144 A
REX640
Product version: 1
ABB
67
Summary of Contents for RELION REX640
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