ABB REU615, Product Manual, Page: 30 / 60

Table 34. Positive-sequence undervoltage protection (PSPTUV)
Characteristic Value
Operation accuracy Depending on the frequency of the voltage measured: f
n
±2 Hz
±1.5% of the set value or ±0.002 x U
n
Start time
1)2) Minimum Typical Maximum
U
Fault
= 0.99 x set
Start
value
U
Fault
= 0.9 x set
Start value
51 ms
43 ms 53 ms
45 ms 54 ms
46 ms
Reset time < 40 ms
Reset ratio Depends of the set
Relative hysteresis
Retardation time < 35 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Suppression of harmonics DFT: -50 dB at f = n x f
n
, where n = 2, 3, 4, 5,…
1)
Start value = 1.0 x U
n
, Positive sequence voltage before fault = 1.1 x U
n
, f
n
= 50 Hz, positive sequence undervoltage with nominal frequency injected
from random phase angle, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
Table 35. Positive-sequence undervoltage protection (PSPTUV) main settings
Parameter Function Value (Range) Step
Start value PSPTUV 0.010...1.200 x U
n
0.001
Operate delay time PSPTUV 40...120000 ms 10
Voltage block value PSPTUV 0.01...1.0 x U
n
0.01
Table 36. Negative-sequence overvoltage protection (NSPTOV)
Characteristic Value
Operation accuracy Depending on the frequency of the voltage measured: f
n
±2 Hz
±1.5% of the set value or ±0.002 × U
n
Start time 1)2)
Minimum Typical Maximum
U
Fault
= 1.1 × set Start value
U
Fault
= 2.0 × set
Start value
33 ms
24 ms 35 ms
26 ms 37 ms
28 ms
Reset time < 40 ms
Reset ratio Typical 0.96
Retardation time < 35 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Suppression of harmonics DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
1) Negative-sequence voltage before fault = 0.0 × U
n
, f
n
= 50 Hz, negative-sequence overvoltage with nominal frequency injected from random phase
angle, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
Voltage Protection and Control 1MRS757058 D
REU615
Product version: 4.0
30 ABB