Negative-Sequence Overvoltage Protection (Nsptov); Three-Phase Thermal Overload Protection, Two Time Constants (T2Pttr) - ABB REV615 Product Manual

Capacitor Bank Protection and Control
REV615
Product version: 5.0 FP1
Table 44. Positive-sequence undervoltage protection (PSPTUV) main settings
Parameter
Start value
Operate delay time
Voltage block value
Table 45. Negative-sequence overvoltage protection (NSPTOV)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
1) Negative-sequence voltage before fault = 0.0 × U
distribution of 1000 measurements
2) Includes the delay of the signal output contact
Table 46. Negative-sequence overvoltage protection (NSPTOV) main settings
Parameter
Start value
Operate delay time
Table 47. Three-phase thermal overload protection, two time constants (T2PTTR)
Characteristic
Operation accuracy
1)
Operate time accuracy
1) Overload current > 1.2 x Operate level temperature
34
Function
PSPTUV
PSPTUV
PSPTUV
Start value
U = 1.1 × set
Fault
Start value
U = 2.0 × set
Fault
, f = 50 Hz, negative-sequence overvoltage with nominal frequency injected from random phase angle, results based on statistical
n n
Function
NSPTOV
NSPTOV
Value (Range)
0.010...1.200 × U
n
40...120000 ms
0.01...1.00 × U
n
Value
Depending on the frequency of the voltage measured: f
±1.5% of the set value or ±0.002 × U
Minimum Typical
33 ms 35 ms
24 ms 26 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)
0.010...1.000 × U
n
40...120000 ms
Value
Depending on the frequency of the measured current: f
Current measurement: ±1.5% of the set value or ±0.002 x I
in the range of 0.01...4.00 x I )
n
±2.0% of the theoretical value or ±0.50 s
1MRS757952 D
Step
0.001
10
0.01
n
n
Maximum
37 ms
28 ms
Step
0.001
1
±2 Hz
n
(at currents
n
ABB