Functionality - ABB REC650 ANSI Technical Manual

Section 6
Current protection
6.3.2
6.3.3
6.3.4
6.3.5
Table 39: EFPIOC (50N) Group settings (basic)
Name Values (Range)
Operation Disabled
Enabled
Pickup 1 - 2500
96

Functionality

The Instantaneous residual overcurrent protection EFPIOC (50N) has a low transient
overreach and short tripping times to allow the use for instantaneous ground-fault
protection, with the reach limited to less than the typical eighty percent of the line at
minimum source impedance. EFPIOC (50N) is configured to measure the residual current
from the three-phase current inputs and can be configured to measure the current from a
separate current input. EFPIOC (50N) can be blocked by activating the input BLOCK.
Function block
EFPIOC (50N)
I3P* TRIP
BLOCK
ANSI08000003-1-en.vsd
ANSI08000003 V1 EN
Figure 35: EFPIOC (50N) function block
Signals
Table 37: EFPIOC (50N) Input signals
Name Type
I3P GROUP
SIGNAL
BLOCK BOOLEAN
Table 38: EFPIOC (50N) Output signals
Name Type
TRIP BOOLEAN
Settings
Unit Step
- -
%IB 1
Default Description
- Three phase group signal for current inputs
0 Block of function
Description
Trip signal
Default Description
Disabled Disable/Enable Operation
200 Operate residual current level in % of IBase
1MRK 511 287-UUS A
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