ABB REC670 Product Manual page 47

ABB
Bay control REC670
Pre-configured
Product version: 1.1
Table 29. Four step residual overcurrent protection EF4PTOC
Function
Operate current
Reset ratio
Operate current for
directional comparison
Timers
Inverse characteristics,
see table 88, table 89 and
table 90
Second harmonic restrain
operation
Relay characteristic angle
Minimum polarizing
voltage
Minimum polarizing
current
Real part of source Z
used for current
polarization
Imaginary part of source
Z used for current
polarization
Operate time, start
function
Reset time, start function
Critical impulse time
Impulse margin time
Range or value
(1-2500)% of lBase
> 95%
(1–100)% of lBase
(0.000-60.000) s
18 curve types
(5–100)% of fundamental
(-180 to 180) degrees
(1–100)% of UBase
(1-30)% of IBase
(0.50-1000.00) W/phase
(0.50–3000.00) W/phase
25 ms typically at 0 to 2 x I
25 ms typically at 2 to 0 x I
10 ms typically at 0 to 2 x I
15 ms typically
1MRK 511 192-BEN B
Issued: June 2010
Accuracy
± 1.0% of I at I £ I
r
± 1.0% of I at I > I
-
± 1.0% of I
r
± 0.5% ± 10 ms
See table 88, table
table 90
± 2.0% of I
r
± 2.0 degrees
± 0.5% of U
r
±0.25% of I
r
-
-
-
set
-
set
-
set
-
r
r
89 and
47