ABB Relion 670 series REC670 - Page 39

Current protection
Table 28. Instantaneous phase overcurrent protection PHPIOC
Function Range or value Accuracy
Operate current (1-2500)% of lBase ± 1.0% of I
r
at I £ I
r
± 1.0% of I at I > I
r
Reset ratio > 95% -
Operate time 25 ms typically at 0 to 2 x I
set
-
Reset time 25 ms typically at 2 to 0 x I
set
-
Critical impulse time 10 ms typically at 0 to 2 x I
set
-
Operate time 10 ms typically at 0 to 10 x I
set
-
Reset time 35 ms typically at 10 to 0 x I
set
-
Critical impulse time 2 ms typically at 0 to 10 x I
set
-
Dynamic overreach < 5% at t = 100 ms -
Table 29. Four step phase overcurrent protection OC4PTOC
Function
Setting range Accuracy
Operate current (5-2500)% of lBase ± 1.0% of I
r
at I ≤ I
r
± 1.0% of I at I > I
r
Reset ratio > 95% at (50–2500)% of lBase -
Min. operating current (1-10000)% of lBase ± 1.0% of I
r
at I ≤ I
r
±1.0% of I at I > I
r
Relay characteristic angle (RCA) (40.0–65.0) degrees ± 2.0 degrees
Relay operating angle (ROA) (40.0–89.0) degrees ± 2.0 degrees
2nd harmonic blocking (5–100)% of fundamental ± 2.0% of I
r
Independent time delay at 0 to 2 x
I
set
(0.000-60.000) s ± 0.2 % or ± 35 ms whichever is
greater
Minimum operate time (0.000-60.000) s ± 2.0 % or ± 40 ms whichever is
greater
Inverse characteristics, see
table 98, table 99 and table 100
16 curve types See table 98, table 99 and table 100
Operate time, start non-directional
at 0 to 2 x I
set
Min. = 15 ms
Max. = 30 ms
Reset time, start non-directional at
2 to 0 x I
set
Min. = 15 ms
Max. = 30 ms
Critical impulse time 10 ms typically at 0 to 2 x I
set
-
Impulse margin time 15 ms typically -
Bay control REC670
1MRK511232-BEN E
Pre-configured
Product version: 1.2
ABB 39