ABB RELION REX640 - 4.1.1.13 Technical revision history; 4.1.2 Three-phase directional overcurrent protection DPHxPDOC (ANSI 67 P;51 P-1, 67 P;51 P-2); 4.1.2.1 Identification

Characteristic Value
I
Fault
= 2 × set Start
value
I
Fault
= 10 × set Start
value
7 ms 9 ms 12 ms
PHHPTOC and
PHLPTOC:
3
I
Fault
= 2 × set Start
value
23 ms 26 ms 29 ms
Reset time
Typically <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
4
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
P-to-P+backup: No suppression
4.1.1.13 Technical revision history
Table 388: PHLPTOC Technical revision history
Product
connectivi
ty level
Technical
revision
Change
PCL4 G Setting Start value maximum value extended to 10.00xIn.
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
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
Measured with static signal output (SSO).
3
Includes the delay of the signal output contact (SO).
4
Maximum Start value = 2.5 × I
n
, Start value multiples in the range of 1.5...20.
Protection functions 1MRS759142 F
344 REX640
Technical Manual