ABB RELION REX640, Руководство по эксплуатации продукта

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Table 77. 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 78. 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 79. 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 0.025...15.000 0.005
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
Table 80. Three-phase overvoltage variation protection (PHVPTOV)
Characteristic Value
Operation accuracy Depending on the frequency of the measured voltage: f
n
±1.5% of the set value or ±0.002 × U
n
Reset ratio Depends on the set
Relative hysteresis
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
1MRS759144 A
REX640
Product version: 1
54 ABB