Three-Phase Directional Overcurrent Protection (Dphxpdoc) - ABB REF615 Product Manual

ABB
Feeder Protection and Control
REF615
Product version: 2.0
Table 26. Three-phase directional overcurrent protection (DPHxPDOC)
Operation Depending on the frequency of the current/voltage measured: f
accuracy
DPHLPDOC
DPHHPDOC
Start time 1) 2)
I
Fault
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode
Operate time accuracy in inverse time mode
Suppression of harmonics
1) Measurement mode and Pol quantity = default, current before fault = 0.0 x I
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 x I
Table 27. Three-phase directional overcurrent protection (DPHxPDOC) main settings
Parameter
Start value
Time multiplier
Operate delay time
Directional mode
Characteristic angle
Operating curve type
1)
1) For further reference please refer to the Operating characteristics table at the end of the Technical data chapter
= 2.0 x set Start value
, Start value multiples in range of 1.5 to 20
n
Function
DPHxPDOC
DPHxPDOC
DPHxPDOC
DPHxPDOC
DPHxPDOC
DPHLPDOC
DPHHPTOC
Current:
±1.5% of the set value or ±0.002 x I
Voltage:
±1.5% of the set value or ±0.002 x U
Phase angle:
±2°
Current:
±1.5% of set value or ±0.002 x I
(at currents in the range of 0.1...10 x I
±5.0% of set value
(at currents in the range of 10...40 x I
Voltage:
±1.5% of the set value or ±0.002 x U
Phase angle:
±2°
Minimum Typical
37 ms 40 ms
< 40 ms
Typical 0.96
< 35 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20
ms
3)
DFT: -50dB at f = n x f ,
n
where n = 2, 3, 4, 5,...
, voltage before fault 1.0 x U
n
Value (Range)
0.05...5.00 x I
n
0.05...15.00
40...200000 ms
1 = Non-directional
2 = Forward
3 = Reverse
-179...180 degrees
Definite or inverse time
Curve type: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
11, 12, 13, 14, 15, 17, 18, 19
Definite or inverse time
Curve type: 1, 3, 5, 9, 10, 12, 15, 17
1MRS756379 D
±2Hz
n
n
n
n
)
n
)
n
n
Maximum
42 ms
, f =
n n
Step
0.01
0.05
10
1
25