UK power quality analyser manufacturer Outram Research has released an updated PM7000 model with an ‘Interharmonics’ option to simultaneously record all harmonics up to the 100th, on all three phases and the neutral, on either current or voltage.
This new functionality makes it possible for engineers to analyse quickly and then eliminate power quality problems found due to high-frequency harmonics generated by uninterruptable power supplies (UPS), drives or inverters.
By simultaneously recording all current or voltage harmonics to the 100th and many other electrical parameters, said Outram, the PM7000I significantly reduces testing time, pinpointing potentially problematic higher-order harmonics and removing the need for a trial and error approach.
For a 3-phase 4 wire wye configuration, the ‘General Parameters’ function records over 70 power quality parameters in addition to the 400 streams of harmonic data.
Because this is automatic, users find they have all the information they need without having to configure individual recording channels. Users can also choose one of thirteen different averaging intervals, from one second to two hours.