APPARATUS FOR TRIGGERING ALARMS AND WAVEFORM CAPTURE IN AN ELECTRONIC POWER SYSTEM

摘要

A monitor/analyzer for an ac electrical system can be programmed through a display on the front panel to respond to selected events by generating triggers signals when selected monitored electrical parameters including neutral current exceed programmed thresholds. The trigger signals initiate simultaneous waveform capture of multiple waveform in the ac system. Multiple trigger signals result in sequential waveform capture so that if a plurality of triggers are programmed for the same event, extended waveform data is captured for the event. Alarm screens are generated inresponse to the events, as well as for hardware failure, an excessive neutral-to-ground voltage or reverse sequence.