ABB REV615 User Manual

Table 35. Negative-sequence overcurrent protection (NSPTOC)
Characteristic Value
Operation accuracy Depending on the frequency of the measured current: f
n
±1.5% of the set value or ±0.002 × I
n
Start time
1)2)
Minimum Typical Maximum
I
Fault
= 2 × set Start value
I
Fault
= 10 × set Start value
23 ms
15 ms
26 ms
18 ms
28 ms
20 ms
Reset time Typically 40 ms
Reset ratio Typically 0.96
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) Negative sequence current before fault = 0.0, f
n
= 50 Hz, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
3) Maximum Start value = 2.5 × I
n
, Start value multiples in range of 1.5...20
Table 36. Negative-sequence overcurrent protection (NSPTOC) main settings
Parameter
Function Value (Range) Step
Start value NSPTOC 0.01...5.00 × I
n
0.01
Time multiplier NSPTOC 0.05...15.00 0.01
Operate delay time NSPTOC 40...200000 ms 10
Operating curve type
1)
NSPTOC Definite or inverse time
Curve type: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19
1) For further reference, see the Operation characteristics table
Table 37. Residual overvoltage protection (ROVPTOV)
Characteristic
Value
Operation accuracy Depending on the frequency of the measured voltage: f
n
±2 Hz
±1.5% of the set value or ±0.002 × U
n
Start time
1)2)
Minimum Typical Maximum
U
Fault
= 2 × set Start value
48 ms 51 ms 54 ms
Reset time Typically 40 ms
Reset ratio Typically 0.96
Retardation time <35 ms
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Suppression of harmonics DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5,…
1) Residual voltage before fault = 0.0 × U
n
, f
n
= 50 Hz, residual voltage 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
Capacitor Bank Protection and Control
1MRS757952 D
REV615
Product version: 5.0 FP1
ABB 31

ABB REV615 Specifications

General

Brand	ABB
Model	REV615
Category	Power distribution unit
Language	English