ABB REC650 ANSI - Monitored Data

Table 40: EFPIOC (50N) Non group settings (basic)
Name Values (Range) Unit Step Default Description
GlobalBaseSel 1 - 6 - 1 1 Selection of one of the Global Base Value
groups
6.3.6 Monitored data
Table 41: EFPIOC (50N) Monitored data
Name Type Values (Range) Unit Description
IN REAL - A Residual current
6.3.7 Operation principle
The sampled analog residual currents are pre-processed in a discrete Fourier filter (DFT)
block. From the fundamental frequency components of the residual current, as well as
from the sample values the equivalent RMS value is derived. This current value is fed to
the Instantaneous residual overcurrent protection (EFPIOC,50N). In a comparator the
RMS value is compared to the set operation current value of the function (Pickup). If the
residual current is larger than the set operation current a signal from the comparator is set
to true. This signal will, without delay, activate the output signal TRIP.
6.3.8 Technical data
Table 42: EFPIOC (50N) technical data
Function
Range or value Accuracy
Operate current (1-2500)% of lBase
± 1.0% of I
n
at I £ I
n
± 1.0% of I at I > I
n
Reset ratio > 95% -
Operate time 20 ms typically at 0 to 2 x I
set
-
Reset time 30 ms typically at 2 to 0 x I
set
-
Critical impulse time 10 ms typically at 0 to 2 x I
set
-
Operate time 10 ms typically at 0 to 5x I
set
-
Reset time 40 ms typically at 5 to 0x I
set
-
Critical impulse time 2 ms typically at 0 to 5 x I
set
-
Dynamic overreach
< 5% at t = 100 ms
-
1MRK 511 287-UUS A Section 6
Current protection
97
Technical manual