ABB REX640 - Underpower Protection (DUPPDPR) Main Settings; Three-Phase Underimpedance Protection (UZPDIS); Three-Phase Underexcitation Protection (UEXPDIS)

Table 121. Underpower protection (DUPPDPR) main settings
Parameter Function Value (Range) Step
Start value DUPPDPR 0.01...2.00 × S
n
0.01
Operate delay time DUPPDPR 40...300000 ms 10
Pol reversal DUPPDPR 0 = False
1 = True
-
Disable time DUPPDPR 0...60000 ms 1000
Table 122. Three-phase underimpedance protection (UZPDIS)
Characteristic
Value
Operation accuracy Depending on the frequency of the measured current and voltage: f
n
±2
Hz
±3.0% of the set value or ±0.2 %Zb
Start time
1)2)
Typically 50 ms
Reset time Typically 40 ms
Reset ratio Typically 1.04
Retardation time <40 ms
Operate time accuracy ±1.0% of the set value or ±20 ms
1) f
n
= 50 Hz, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
Table 123. Three-phase underimpedance protection (UZPDIS) main settings
Parameter
Function Value (Range) Step
Polar reach UZPDIS 1...6000 %Z
n
1
Operate delay time UZPDIS 40...200000 ms 10
Table 124. Three-phase underexcitation 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
1MRS759144 A
REX640
Product version: 1
68 ABB