Three-Phase Directional Overcurrent Protection Dphxpdoc (Ansi 67P/51P-1, 67P/51P-2) - ABB RELION REX640 Technical Manual

Protection functions
Characteristic
Reset time
Reset ratio
Retardation time
Operate time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Operate time accuracy in inverse time mode
Suppression of harmonics
4.1.1.13 Technical revision history
Table 388: PHLPTOC Technical revision history
Product
connectivi
ty level
PCL4
4.1.2 Three-phase directional overcurrent protection DPHxPDOC
(ANSI 67P/51P-1, 67P/51P-2)
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
Measured with static signal output (SSO).
3
Includes the delay of the signal output contact (SO).
4 Maximum Start value = 2.5 × I
344
I = 2 × set
Fault
value
I = 10 × set
Fault
value
PHHPTOC and
3
PHLPTOC:
I = 2 × set
Fault
value
Technical Change
revision
Start value maximum value extended to 10.00xIn.
G Setting
Start value multiples in the range of 1.5...20.
,
n
Value
Start
7 ms
Start
23 ms
Start
Typically <40 ms
Typically 0.96
<30 ms
±5.0% of the theoretical value or ±20 ms
RMS: No suppression
DFT: -50 dB at f = n × f
Peak-to-Peak: No suppression
P-to-P+backup: No suppression
1MRS759142 F
9 ms 12 ms
26 ms 29 ms
, where n = 2, 3, 4, 5,...
n
, f = 50 Hz, fault
n n
REX640
Technical Manual
4