Positive-Sequence Overvoltage Protection (Psptov); Positive-Sequence Overvoltage Protection (Psptov) Main Settings; Positive-Sequence Undervoltage Protection (Psptuv); Positive-Sequence Undervoltage Protection (Psptuv) Main Settings - ABB REX640 Product Manual

REX640
Product version: 1
Table 84. Positive-sequence overvoltage protection (PSPTOV)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
1) Positive-sequence voltage before fault = 0.0 × U
2) Measured with static signal output (SSO)
Table 85. Positive-sequence overvoltage protection (PSPTOV) main settings
Parameter
Start value
Operate delay time
Table 86. Positive-sequence undervoltage protection (PSPTUV)
Characteristic
Operation accuracy
Start time 1)2)
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
1) Start value = 1.0 × U , positive-sequence voltage before fault = 1.1 × U
n
on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
Table 87. Positive-sequence undervoltage protection (PSPTUV) main settings
Parameter
Start value
Operate delay time
Voltage block value
56
Start value
U = 1.1 × set
Fault
Start value
U = 2 × set
Fault
, f = 50 Hz, positive-sequence overvoltage of nominal frequency injected from random phase angle
n n
Function
PSPTOV
PSPTOV
U = 0.99 × set Start value
Fault
Start value
U = 0.9 × set
Fault
, f = 50 Hz, positive sequence undervoltage with nominal frequency injected from random phase angle, results based
n n
Function
PSPTUV
PSPTUV
PSPTUV
Value
Depending on the frequency of the measured current: f
±1.5% of the set value or ±0.002 × U
Minimum Typical
29 ms 32 ms
32 ms 24 ms
Typically 40 ms
Typically 0.96
<35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
Value (Range)
0.400...1.600 × U
n
40...120000 ms
Value
Depending on the frequency of the measured voltage: f
±1.5% of the set value or ±0.002 × U
Minimum Typical
52 ms 55 ms
44 ms 47 ms
Typically 40 ms
Relative hysteresis
Depends on the set
<35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
Value (Range)
0.010...1.200 × U
n
40...120000 ms
0.01...1.00 × U
n
1MRS759144 A
±2 Hz
n
n
Maximum
34 ms
26 ms
Step
0.001
10
±2 Hz
n
n
Maximum
58 ms
50 ms
Step
0.001
10
0.01
ABB