Disturbance Recorder - GE D90 Plus Instruction Manual

Line distance protection system

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DISTURBANCE RECORDER

Disturbance recorder

Figure 386: Analog channel trigger logic

The disturbance recorder is designed to capture short duration events, such as faults at a

high resolution. Under normal operation, the disturbance recorder is continuously

capturing pre-fault data and storing this data in memory. When a trigger is received, the

disturbance recorder will capture the data during the period of the fault. Both the pre-fault

and fault data are stored as a record in non-volatile memory within the D90

The disturbance recorder captures the instantaneous values of all voltage and current

signals connected to the D90

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-fault data. Triggered and re-triggered

records are merged into a single file, and the maximum number of re-triggers for a

particular fault is user-programmable.

CHAPTER 10: DIGITAL FAULT RECORDER

. In addition, the user can configure digital and analog

LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL