Waveforms

Waveforms are graphical representations of voltage and current that show their variations over time. The waveform displays in PME are based on logged, historical measurements that were recorded by a monitoring device. The measurements recorded by a device for a waveform capture are called samples and the speed with which these samples are taken is called sampling rate. The higher the sampling rate, the more accurately the waveform capture represents the actual voltage or current waveform. Captures taken by different device types can have different sampling rates, depending on the capabilities and settings of the device.

Use Waveforms to analyze power quality events by viewing the individual wave shapes, the magnitudes, the phase angles between voltage and current, and the timing of wave shape variations. Waveform data is also used to show voltage and current phasors and the individual harmonic components.

Prerequisites

The monitoring device data associated with the alarm or incident must include waveform captures.