CHAPTER 5: SETPOINTS
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL 5–11
value of 25%, for example, when the WAVEFORM MEMORY BUFFER is “7 x 16" cycles,
would produce a waveform of 4 pre-trip cycles and 12 post-trip cycles.
• WAVEFORM MEMORY BUFFER: Selects the partitioning of the waveform memory. The
first number indicates the number of events and the second number, the number of
cycles. The relay captures 12 samples per cycle. When more waveform captures occur
than the available storage, the oldest data will be discarded.
Courtesy of NationalSwitchgear.com
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