ABB RELION 615 Series Product Manual page 39

Transformer Protection and Control
RET615
Product version: 5.0 FP1
Table 36. Residual overvoltage protection (ROVPTOV) main settings
Parameter
Start value
Operate delay time
Table 37. Three-phase undervoltage protection (PHPTUV)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
Start value = 1.0 × U
1) , Voltage before fault = 1.1 × U
n
distribution of 1000 measurements
2) Includes the delay of the signal output contact
Start value = 0.50, Start value multiples in range of 0.90...0.20
3) Minimum
Table 38. Three-phase undervoltage protection (PHPTUV) main settings
Parameter
Start value
Time multiplier
Operate delay time
1)
Operating curve type
1) For further reference, see the Operation characteristics table
ABB
Function
ROVPTOV
ROVPTOV
Start value
U = 0.9 × set
Fault
, f = 50 Hz, undervoltage in one phase-to-phase with nominal frequency injected from random phase angle, results based on statistical
n n
Function
PHPTUV
PHPTUV
PHPTUV
PHPTUV
Value (Range)
0.010...1.000 × U
n
40...300000 ms
Value
Depending on the frequency of the voltage measured: f
±1.5% of the set value or ±0.002 × U
Minimum Typical
62 ms 66 ms
Typically 40 ms
Relative hysteresis
Depends on the set
<35 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20 ms
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
Value (Range)
0.05...1.20 × U
n
0.05...15.00
60...300000 ms
Definite or inverse time
Curve type: 5, 15, 21, 22, 23
1MRS756891 M
Step
0.001
1
±2 Hz
n
n
Maximum
70 ms
3)
Step
0.01
0.01
10
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