 The instrument has 12 PD channels, one power frequency reference channel and two auxiliary inputs for external temperature and humidity sensors allowing for PD correlations with external dynamics. All PD channels have identical isolated input circuitry with protection and high pass filters. The frequency band is 0.5 to 10 MHz. Advanced signal processing techniques are utilized to eliminate noise that occurs in high noise environments such as in high voltage substations. Noise filtering includes, but not limited with, magnitude, polarity and time of arrival - almost all technologies that may found combined in different instruments on the market. PD channels may be flexibly configured to use one or another noise filtering technology or a combination of technologies.
Another unique feature built into the analyzer is a reflectometer. Use of the reflectometer will assist in locating of a defect, such as in a long cable or bus duct. The instrument is capable to record up to three time domain reflectograms per channel with different trigger levels. The trigger level may b e automaticaly adjusted to signal level or pre-determined by the operator. PD data is stored in the form of phase-resolved pulse height distribution. The instrument has 48 phase windows (7.5 Degrees) and 32 magnitude windows with a single dynamic range of 70dB without gain adjustment. A full suite of software is included that allows the user to download all data to a PC, perform analysis and present the data. |
