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3.3.1 DIRECTIONAL OVERCURRENT LOGIC

I>1 Timer Block

V00602

Blinder Function

3Ph(based on Z 1)

Z1 LoadBlinder

I> Blocking 2

Blinder Blk I>1

VTS Fast Block

I> Blocking

VTS Blocks I>1

Directional

check

I>1 Direction

I>1 Start A

I>1 Trip A

IA2H Start

I> Blocking

2H Blocks I>1

2H 1PH BLOCK

I>1 Current Set

IDMT/DT

Timer Settings

I2H Any Start

I> Blocking

2H Blocks I>1

2H 1PH BLOCK

Notes: This diagram does not show all stages . Other stages follow

similar principles.

This diagram does not show all phases . Other phases follow

similar principles.

Load blinder functionality is only available for stages 1, 2 and 5

and on selected directional models .

AR blocking is only available for stages 3, 4 and 6

AR Blk Main Prot

I> Blocking

AR Blocks I>3

AR blocking available for DT-only stages

Load Blinder blocking available for stages 1, 2 and 5

I> Char Angle

VAB

Figure 35: Directional Overcurrent Logic diagram (Phase A shown only)

Voltage Transformer S

upervision (VTS) can be used to block operation of directional overcurrent elements.

This is achieved using the I>Blocking cell. When the relevant bit is set to 1, operation of the VTS will block the stage

if directionalised. When set to 0, the stage will revert to non-directional upon operation of the VTS.

P14x Chapter 6 - Current Protection Functions

P14xEd1-TM-EN-1 101

Brand	GE
Model	MiCOM P142 Agile
Category	Control Unit
Language	English

GE MiCOM P142 Agile User Manual

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