ABB Relion 670 series - Functionality

8.3.1 Identification
M14887-1 v4
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Instantaneous residual overcurrent
protection
EFPIOC
IN>>
IEF V1 EN-US
50N
8.3.2 Functionality
M12701-3 v14
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.
8.3.3 Function block
M12614-3 v6
ANSI06000269-2-en.vsd
EFPIOC (50N)
I3P*
BLOCK
BLKAR
MULTPU
TRIP
ANSI06000269 V2 EN-US
Figure 252: EFPIOC (50N) function block
8.3.4 Signals
IP11448-1 v2
PID-3574-INPUTSIGNALS v3
Table 220: EFPIOC (50N) Input signals
Name Type Default Description
I3P GROUP
SIGNAL
- Three phase currents
BLOCK BOOLEAN 0 Block of function
BLKAR BOOLEAN 0 Block from auto recloser
MULTPU BOOLEAN 0 Enable current multiplier
PID-3574-OUTPUTSIGNALS v2
Table 221: EFPIOC (50N) Output signals
Name
Type Description
TRIP BOOLEAN Trip signal
Section 8 1MRK 502 066-UUS B
Current protection
468
Technical manual