ABB ret650, Руководство по эксплуатации продукта

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Table 32. Four step residual overcurrent protection EF4PTOC
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
69 , table 70 and table 71
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
Minimum polarizing voltage, Zero
sequence (1–100)% of
UBase
±
0.5% of U
r
Minimum polarizing voltage,
Negative sequence (1–100)% of
UBase
± 0.5% of U
r
Minimum polarizing current, Zero
sequence (2–100)% of IBase
±
1.0% of I
r
Minimum polarizing current,
Negative sequence (2–100)% of
IBase
±
1.0% of I
r
Real part of source Z used for
current polarization
(0.50-1000.00) W /phase
-
Imaginary part of source Z used
for current polarization (0.50–3000.00)
W
/phase -
Operate time, non-directional
start function 30 ms typically at 0.5 to 2 x I
set
-
Reset time, non-directional start
function 30 ms typically at 2 to 0.5 x I
set
-
Operate time, directional start
function 30 ms typically at 0,5 to 2 x I
N
-
Reset time, directional start
function 30 ms typically at 2 to 0,5 x I
N
-
1) Note: Timing accuracy only valid when 2nd harmonic blocking is turned off.
Transformer protection RET650 1MRK 504 137-BEN B
Product version: 1.3
ABB 43