ABB ret650 - 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
IEC13000015-1-en.vsd
2
N D
H A R M
D
UseStartValue
IN1>
IN2>
IN3>
IN4>
a
b
a>b
|I
OP
|
t
t=70ms
OR
AN
D
BlkParTransf=On
q
-1
OR
2ndH_BLOCK_Int
IEC13000015 V1 EN
Figure 75: Second harmonic blocking
8.4.9 Technical data
Table 90: EF4PTOC technical data
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 current for directional
comparison, Zero sequence
(1–100)% of lBase
± 2.0% of I
r
Operate current for directional
comparison, Negative sequence
(1–100)% of lBase
± 2.0% of I
r
Min. operating current (1-10000)% of lBase ± 1.0% of I
r
at I < I
r
± 1.0% of I at I >I
r
Minimum operate time for inverse
characteristics
(0.000-60.000) s ± 0.5% ± 25 ms
Timers (0.000-60.000) s
± 0.5% ±25 ms
Inverse characteristics, see table
559, table 560 and table 561
15 curve types
1)
ANSI/IEEE C37.112
IEC 60255–151
±3% or ±40 ms
0.10 ≤ k ≤ 3.00
1.5 x I
set
≤ I ≤ 20 x I
set
Table continues on next page
1MRK 504 135-UEN A Section 8
Current protection
171
Technical manual