ABB / Three phase overcurrent (LCP3PTOC) for DTT _ Setting & highlights _ AB2117

Overview

The “Three phase overcurrent” function is designed for overcurrent conditions. It is a single definite time stage trip function that has phase wise start and trip signals.

For more detailed information on “Three phase overcurrent” function, refer to ABB, Relion 670 Series manuals.

To see other supported functions, click here.

Function Identification

Function description	IEC 61850 identification	IEC 60617 identification	ANSI/IEEE C37.2 device number
Three phase overcurrent	LCP3PTOC	–	51

Signals & Setting Parameters

LCP3PTOC Function block

LCP3PTOC Input signals

LCP3PTOC Input signals
Name	Type	Default	Description
I3P	GROUP SIGNAL	–	Three phase group signal for current inputs
BLOCK	BOOLEAN	0	Block all binary outputs by resetting timers
BLKTR	BOOLEAN	0	Block trip of the function

LCP3PTOC Output signals

LCP3PTOC Output signals
Name	Type	Description
TRIP	BOOLEAN	Common trip signal
TRL1	BOOLEAN	Trip signal from phase L1
TRL2	BOOLEAN	Trip signal from phase L2
TRL3	BOOLEAN	Trip signal from phase L3
START	BOOLEAN	Common start signal
STL1	BOOLEAN	Start signal from phase L1
STL2	BOOLEAN	Start signal from phase L2
STL3	BOOLEAN	Start signal from phase L3

LCP3PTOC Group settings (basic)

LCP3PTOC Group settings (basic)
Name	Values (Range)	Unit	Step	Default	Description
Operation	Off On	–	–	Off	Operation On / Off
IOC>	5 – 2500	%IB	1	1000	Start value for 3 phase over current in % of IBase
tOC	0.000 – 60.000	s	0.001	0.020	Time delay to operate

LCP3PTOC Non group settings (basic)

LCP3PTOC Non group settings (basic)
Name	Values (Range)	Unit	Step	Default	Description
GlobalBaseSel	1 – 12	–	1	1	Selection of one of the Global Base Value groups

LCP3PTOC Monitored data

LCP3PTOC Monitored data
Name	Type	Values (Range)	Unit	Description
IL1	REAL	–	A	Current RMS value for phase L1
IL2	REAL	–	A	Current RMS value for phase L2
IL3	REAL	–	A	Current RMS value for phase L3