ABB Relion 620 Series - Three-Phase Directional Overcurrent Protection Dphxpdoc

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