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7 Event, alarm, and trip recording with waveform capture
PXR TRIP UNITS FOR POWER DEFENSE MOLDED CASE CIRCUIT BREAKERS MN012007EN March 2019 www.eaton.com
7 Event, alarm, and trip recording with waveform capture
The PXR trip unit will record information surrounding events, alarms, and trips into a set of
logs. The information is easily viewed using PXPM software. For simple events, only the
reason and a time-stamp (based on the trip unit’s real-time clock) are stored. Important
events additionally store a snap-shot of real-time values (currents and voltages). The most
important events store additional information, storing waveforms of current and voltage
experienced during the event as long as auxiliary power is applied. For a trip waveform, ten
cycles (six pre-event, four post-event) are saved for review using PXPM software.
Each log can store a set number of events and is managed as a first-in first-out buffer (FIFO).
As the information is stored for the most recent event, the information from the oldest event
is eliminated.
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