Three-Phase Directional Overcurrent Protection Dphxpdoc - ABB RELION 620 Series Technical Manual

1MRS757644 H
4.1.2.10 Technical data
Table 268: PH3xPTOC Technical data
Characteristic
Operation accuracy
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
4.1.3 Three-phase directional overcurrent protection
DPHxPDOC
4.1.3.1 Identification
Function description
Three-phase directional overcur-
rent protection, low stage
Three-phase directional overcur-
rent protection, high stage
1 Measurement mode = default (depends on stage), current before fault = 0.0 × I
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 Start value = 2.5 × I
Maximum
620 series
Technical Manual
PH3LPTOC
PH3HPTOC and PH3IPTOC
PH3IPTOC:
Start value
I = 2 × set
Fault
Start value
I = 10 × set
Fault
PH3HPTOC and PH3LPTOC:
I = 2 × set Start value
Fault
Start value multiples in range of 1.5...20
,
n
Value
Depending on the frequency of the measured current: f
Hz
±1.5% of the set value or ±0.002 × I
±1.5% of set value or ±0.002 × I
0.1...10 × I )
n
±5.0% of the set value (at currents in the range of 10...40 × I
Minimum Typical
15 ms 16 ms
11 ms 14 ms
23 ms 25 ms
<40 ms
Typically 0.96
<30 ms
±1.0% of the set value or ±20 ms
±5.0% of the theoretical value or ±20 ms
RMS: No suppression
DFT: -50 dB at f = n × f , where n = 2, 3, 4, 5,...
n
Peak-to-Peak: No suppression
Peak-to-Peak + backup: No suppression
IEC 61850 IEC 60617
identification identification
3I> ->
DPHLPDOC
DPHHPDOC 3I>> ->
Protection functions
±2
n
n
(at currents in the range of
n
Maximum
17 ms
17 ms
28 ms
ANSI/IEEE
C37.2 device
number
67-1
67-2
, f = 50 Hz, fault
n n
)
n
273