ABB Relion 615 series, Product Manual, Page: 31 / 56

Table 37. Positive-sequence undervoltage protection (PSPTUV)
Characteristic Value
Operation accuracy Depending on the frequency of the measured voltage: f
n
±2 Hz
±1.5% of the set value or ±0.002 × U
n
Start time
1)2)
Minimum Typical Maximum
U
Fault
= 0.99 × set
Start value
U
Fault
= 0.9 × set Start value
52 ms
44 ms 55 ms
47 ms 58 ms
50 ms
Reset time Typically 40 ms
Reset ratio Depends on 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 × f
n
, where n = 2, 3, 4, 5,…
1)
Start value = 1.0 × U
n
, positive-sequence voltage before fault = 1.1 × 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 38. Positive-sequence undervoltage protection (PSPTUV) main settings
Parameter Function Value (Range) Step
Start value PSPTUV 0.010...1.200 × U
n
0.001
Operate delay time PSPTUV 40...120000 ms 10
Voltage block value PSPTUV 0.01...1.00 × U
n
0.01
Table 39. Negative-sequence overvoltage protection (NSPTOV)
Characteristic Value
Operation accuracy Depending on the frequency of the voltage measured: f
n
±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 Typically 40 ms
Reset ratio Typically 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
Table 40. Negative-sequence overvoltage protection (NSPTOV) main settings
Parameter Function Value (Range) Step
Start value NSPTOV 0.010...1.000 × U
n
0.001
Operate delay time NSPTOV 40...120000 ms 1
Voltage Protection and Control 1MRS757058 K
REU615
Product version: 5.0 FP1
ABB 31