Disturbance Recorder - GE D90 Plus Instruction Manual

DISTURBANCE RECORDER

Disturbance recorder
520
Figure 449: Analog channel trigger logic
The disturbance recorder is designed to capture long duration events, such as power
swings at a resolution of one sample per cycle. Under normal operation, the disturbance
recorder is continuously capturing pre-event data and storing this data in memory. When
a trigger is received, the disturbance recorder will capture the data during the post-event
period. Both the pre-event and post-event data are stored as a record in non-volatile
Plus
memory within the D90
The disturbance recorder captures the user-configured digital and analog channels, each
of which can be used to trigger or re-trigger the disturbance recorder. A re-trigger captures
an additional record but with no pre-event data. Triggered and re-triggered records are
merged into a single file, and the maximum number of re-triggers for a particular event is
user-programmable.
.
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 10: DIGITAL FAULT RECORDER