Table 38. Residual overvoltage protection (ROVPTOV) main settings
Parameter
Function
Value (Range)
Step
Start value
ROVPTOV
0.010...1.000 × U
n
0.001
Operate delay time
ROVPTOV
40...300000 ms
1
Table 39. Three-phase undervoltage protection (PHPTUV)
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
= 0.9 × set
Start value
62 ms
66 ms
70 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
Operate time accuracy in inverse time mode
±5.0% of the theoretical value or ±20 ms
3)
Suppression of harmonics
DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
1)
Start value = 1.0 × U
n
, Voltage before fault = 1.1 × U
n
, f
n
= 50 Hz, undervoltage in one phase-to-phase 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
3)
Minimum
Start value = 0.50, Start value multiples in range of 0.90...0.20
Table 40. Three-phase undervoltage protection (PHPTUV) main settings
Parameter
Function
Value (Range)
Step
Start value
PHPTUV
0.05...1.20 × U
n
0.01
Time multiplier
PHPTUV
0.05...15.00
0.01
Operate delay time
PHPTUV
60...300000 ms
10
Operating curve type
1)
PHPTUV
Definite or inverse time
Curve type: 5, 15, 21, 22, 23
1)
For further reference, see the Operation characteristics table
Capacitor Bank Protection and Control
1MRS757952 D
REV615
Product version: 5.0 FP1
32
ABB
Summary of Contents for RELION REV615
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