3-Phase Autoreclose Cycle Selection; Dead Time Control; Figure 167: Three-Phase Autoreclose Cycle Selection Logic Diagram (Module 21) - GE MiCOM P40 Technical Manual

Hide thumbs Also See for MiCOM P40:

Table of Contents

3-PHASE AUTORECLOSE CYCLE SELECTION

CB1 L3 PAROK

CB1 L SPAROK

CB2 TMEM 3 P

CB2 OP 2 /3P

CB1 OP 2 /3P

CB2 OP 2 /3P

Once an Autoreclose cycle has started, the conditions to enable the dead time to run are determined by the menu

settings, the circuit breaker status, the protection status, the nature of the AR cycle (single-phase or three-phase),

and the opto-isolated inputs from external sources.

Three settings are involved in controlling the dead time start:

DT Start by Prot

3PDTStart WhenLD

DTStart by CB Op

The DT Start by Prot determines how the protection action will initiate a dead time. The setting is always visible

and has three options Protection Reset, Protection Op (protection operation), and Disable which

should be selected if you don't want protection action to start the dead time. These options set the basic

conditions for starting the dead time.

Selecting protection operation to start the dead time can, optionally, be qualified by a check that the line is dead.

Selecting protection reset to start the dead time can, optionally, be qualified by a check, that the circuit breaker is

open (DTStart by CB Op) before starting the dead time. For three-phase tripping applications, there is a further

option to check that the line is dead (3PDTStart WhenLD) before starting the dead time.

P446SV-TM-EN-1

Chapter 11 - Autoreclose

CB1 AR 3p InProg

CB2 AR 3p InProg