GE GEK 106168E manual Events to Trigger the Oscillography, Operation Logic, GEK-106168E

2. OPERATION LOGIC

The user can select from the following list which signals may trigger the oscillography:

Events to Trigger the

Oscillography

PICKUP

1ST STAGE TRIP

2ND STAGE TRIP

INTERNAL ARC

50BF A TRIP

50BF B TRIP

50BF C TRIP

50BF 3P TRIP

EXTERNAL TRIGGER

COMM. TRIGGER

HI-SET A PICKUP

HI-SET B PICKUP

HI-SET C PICKUP

50BF A INIT

50BF B INIT

50BF C INIT

LO-SET A PICKUP

LO-SET B PICKUP

LO-SET C PICKUP

3 POLE 50BF INIT

NEUTRAL PICKUP

ARC A PICKUP

ARC B PICKUP

ARC C PICKUP

The oscillography records are retrieved from the relay to the computer in COMTRADE international standard format using the GE_LOCAL communications program. To draw the waveforms, digital flags, phasors and post- fault analysis in general, it is suggested to use the GE_OSC oscillography program or any other that accepts COMTRADE international format (IEEE-C37.111-1991). It is also possible to import the waveforms with mathematical or spreadsheet programs (for example EXCELTM).

GEK-106168E DBF Breaker Failure Protection 11