Enhanced MicroVersaTrip Plus and MicroVersaTrip PM trip units give you two new ways to monitor and control circuit breakers with unprecedented ease. Through the simple keypad, the trip unit lets you program and display a variety of functions including tripping characteristics, remote communications, status information and protective relaying, and allows integration with GE POWER LEADER Power Management Systems. The trip unit display also allows viewing of many standard metering parameters as well as pickup alarms, trip target indications and fault status information. Enhanced MicroVersaTrip Plus and MicroVersaTrip PM trip units continue to use GE's proven technique of measuring true rms currents (and voltages for MicroVersaTrip PM trip units) of both sinusoidal and harmonically distorted waveforms. The frequent sampling (64 times per cycle) allows precise calculations of true rms current. The sampling rate allows waveform measurement up to the 31st harmonic to achieve accuracy of 99%. GE's true rms sensing avoids potential underprotection or overprotection problems associated with peak-sensing tripping systems. This trip unit is for use only with new circuit breakers. For replacement trip units, add an "R" to the end of the catalog number.