ABB REX640 - Three-Phase Directional Overcurrent Protection (Dphxpdoc)

Table 54. Three-phase directional overcurrent protection (DPHxPDOC)
Characteristic Value
Operation accuracy Depending on the frequency of the current/voltage measured: f
n
±2 Hz
DPHLPDOC
Current:
±1.5% of the set value or ±0.002 × I
n
Voltage:
±1.5% of the set value or ±0.002 × U
n
Phase angle: ±2°
DPHHPDOC Current:
±1.5% of the set value or ±0.002 × I
n
(at currents in the range of 0.1…10 × I
n
)
±5.0% of the set value
(at currents in the range of 10…40 × I
n
)
Voltage:
±1.5% of the set value or ±0.002 × U
n
Phase angle: ±2°
Start time
1)2)
Minimum Typical Maximum
I
Fault
= 2.0 × set Start value
39 ms 43 ms 47 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) Measurement mode and Pol quantity = default, current before fault = 0.0 × I
n
, voltage before fault = 1.0 × U
n
, f
n
= 50 Hz, fault current in one 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) Maximum Start value = 2.5 × I
n
, Start value multiples in range of 1.5...20
Table 55. Three-phase directional overcurrent protection (DPHxPDOC) main settings
Parameter
Function Value (Range) Step
Start value DPHLPDOC 0.05...5.00 × I
n
0.01
DPHHPDOC 0.10...40.00 × I
n
0.01
Time multiplier DPHxPDOC 0.025...15.000 0.005
Operate delay time DPHxPDOC 40...300000 ms 10
Directional mode DPHxPDOC 1 = Non-directional
2 = Forward
3 = Reverse
-
Characteristic angle DPHxPDOC -179...180° 1
Operating curve type
1)
DPHLPDOC Definite or inverse time
Curve type: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19
DPHHPDOC Definite or inverse time
Curve type: 1, 3, 5, 9, 10, 12, 15, 17
1) For further reference, see the Operating characteristics table
1MRS759144 A
REX640
Product version: 1
ABB 45