ABB REG670 - Functionality; Identification; Instantaneous Residual Overcurrent Protection EFPIOC

8.3 Instantaneous residual overcurrent protection
EFPIOC
8.3.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Instantaneous residual overcurrent
protection
EFPIOC
IN>>
IEF V1 EN
50N
8.3.2 Functionality
The Instantaneous residual overcurrent protection EFPIOC has a low transient
overreach and short tripping times to allow the use for instantaneous earth-fault
protection, with the reach limited to less than the typical eighty percent of the line at
minimum source impedance. EFPIOC 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.
8.3.3 Function block
IEC06000269-2-en.vsd
EFPIOC
I3P*
BLOCK
BLKAR
MULTEN
TRIP
IEC06000269 V2 EN
Figure 162: EFPIOC function block
8.3.4 Signals
Table 165: EFPIOC Input signals
Name
Type Default Description
I3P GROUP
SIGNAL
- Three phase currents
BLOCK BOOLEAN 0 Block of function
BLKAR BOOLEAN 0 Block input for auto reclose
ENMULT BOOLEAN 0 Enable current multiplier
1MRK502052-UEN B Section 8
Current protection
351
Technical manual