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
16 curve types
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
Содержание Relion REG670
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