ABB REG670 - Technical Data

a
b
a>b
BLOCK
AND
I
OP
Extract second
harmonic current
component
Extract
fundamental
current component
X
2ndHarmStab
a
b
a>b
a
b
a>b
0.07*IBase
IEC13000014-2-en.vsd
2ndH_BLOCK_Int
IEC13000014 V2 EN
Figure 161: Second harmonic blocking
8.2.9 Technical data
Table 164: OC4PTOC technical data
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 959, table 960 and table 961
16 curve types See table 959, table 960 and table
961
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 -
Section 8 1MRK502052-UEN B
Current protection
350
Technical manual