Table 48. Three-phase overvoltage protection (PHPTOV) main settings
Parameter
Function
Value (Range)
Step
Start value
PHPTOV
0.05...1.60 × U
n
0.01
Time multiplier
PHPTOV
0.05...15.00
0.01
Operate delay time
PHPTOV
40...300000 ms
10
Operating curve type
1)
PHPTOV
Definite or inverse time
Curve type: 5, 15, 17, 18, 19, 20
1)
For further reference, see the Operation characteristics table
Table 49. 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 50. 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
Generator and Interconnection Protection
1MRS758279 B
REG615
Product version: 5.0 FP1
ABB
41
