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Table 24. 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
(1–100)% of
lBase
±
1.0% 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
and
17 curve types
, table
table
Minimum polarizing
voltage
(1–100)% of
UBase
±
0.5% of U
r
Minimum polarizing
current
(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
-
Bay control REC650
1MRK 511 249-BEN -
Product version: 1.1
Issued: February 2011
ABB
53
Summary of Contents for REC650 ANSI
Page 1: ...Relion 650 series Bay control REC650 Product Guide...
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