ABB Relion 670 Series Product Manual page 42

Busbar protection REB670
Customized
Product version: 1.2
Current protection
Table 24. Four step phase overcurrent protection OC4PTOC
Function
Operate current
Reset ratio
Min. operating current
Relay characteristic angle (RCA)
Relay operating angle (ROA)
2nd harmonic blocking
Independent time delay at 0 to 2 x
I
set
Minimum operate time
Inverse characteristics, see
table 79, table 80 and table 81
Operate time, start non-directional
at 0 to 2 x I
set
Reset time, start non-directional at
2 to 0 x I
set
Critical impulse time
Impulse margin time
Table 25. Four step single phase overcurrent protection PH4SPTOC
Function
Operate current
Reset ratio
Second harmonic blocking
Independent time delay
Minimum operate time
Inverse characteristics, see
table 79 and table 80
Operate time, start function
Reset time, start function
Critical impulse time
Impulse margin time
42
Setting range
lBase
(5-2500)% of
lBase
> 95% at (50–2500)% of
(1-10000)% of lBase
(40.0–65.0) degrees
(40.0–89.0) degrees
(5–100)% of fundamental
(0.000-60.000) s
(0.000-60.000) s
16 curve types
Min. = 15 ms
Max. = 30 ms
Min. = 15 ms
Max. = 30 ms
10 ms typically at 0 to 2 x I
set
15 ms typically
Setting range
(1-2500)% of l
base
> 95%
(5–100)% of fundamental
(0.000-60.000) s
(0.000-60.000) s
19 curve types
25 ms typically at 0 to 2 x I
set
25 ms typically at 2 to 0 x I
set
10 ms typically at 0 to 2 x I
set
15 ms typically
Accuracy
± 1.0% of I at I £ I
r r
± 1.0% of I at I > I
r
-
± 2.0% of I
r
± 0.5% ± 10 ms
± 0.5% ± 10 ms
See table 79 and table 80
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1MRK505273-BEN D
Accuracy
± 1.0% of I at I ≤ I
r r
± 1.0% of I at I > I
r
-
± 1.0% of I at I ≤ I
r r
±1.0% of I at I > I
r
± 2.0 degrees
± 2.0 degrees
± 2.0% of I
r
± 0.2 % or ± 35 ms whichever is
greater
± 2.0 % or ± 40 ms whichever is
greater
See table 79, table 80 and table
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81
ABB