Three-Phase Overvoltage Protection (Phptov); Positive-Sequence Undervoltage Protection (Psptuv) - ABB REV615 Product Manual

Capacitor Bank Protection and Control
REV615
Product version: 5.0 FP1
Table 41. Three-phase overvoltage protection (PHPTOV)
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
1) Start value = 1.0 × U , Voltage before fault = 0.9 × U
n
distribution of 1000 measurements
2) Includes the delay of the signal output contact
3) Maximum Start value = 1.20 × U
Table 42. Three-phase overvoltage protection (PHPTOV) main settings
Parameter
Start value
Time multiplier
Operate delay time
1)
Operating curve type
1) For further reference, see the Operation characteristics table
Table 43. Positive-sequence undervoltage protection (PSPTUV)
Characteristic
Operation accuracy
1)2)
Start time
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Suppression of harmonics
Start value = 1.0 × U
1) , positive-sequence voltage before fault = 1.1 × U
n
on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
ABB
Start value
U = 1.1 × set
Fault
, f = 50 Hz, overvoltage in one phase-to-phase with nominal frequency injected from random phase angle, results based on statistical
n n
, Start value multiples in range of 1.10...2.00
n
Function
PHPTOV
PHPTOV
PHPTOV
PHPTOV
Start value
U = 0.99 × set
Fault
Start value
U = 0.9 × set
Fault
, f
n
Value
Depending on the frequency of the measured voltage: f
±1.5% of the set value or ±0.002 × U
Minimum
23 ms
Typically 40 ms
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
Value (Range)
0.05...1.60 × U
0.05...15.00
40...300000 ms
Definite or inverse time
Curve type: 5, 15, 17, 18, 19, 20
Value
Depending on the frequency of the measured voltage: f
±1.5% of the set value or ±0.002 × U
Minimum
52 ms
44 ms
Typically 40 ms
Depends on the set
<35 ms
±1.0% of the set value or ±20 ms
DFT: -50 dB at f = n × f
= 50 Hz, positive sequence undervoltage with nominal frequency injected from random phase angle, results based
n
n
Typical
27 ms
Relative hysteresis
3)
, where n = 2, 3, 4, 5,...
n
Step
0.01
n
0.01
10
n
Typical
55 ms
47 ms
Relative hysteresis
, where n = 2, 3, 4, 5,...
n
1MRS757952 D
±2 Hz
n
Maximum
31 ms
±2 Hz
n
Maximum
58 ms
50 ms
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