Sold-State Trip Units (Power +, MVT and EntelliGuard)

Power+

The Power+ trip unit is the latest addition to the list of trip units available on GE low voltage power circuit breakers. It continues to use GE’s proven technique of measuring true rms currents of both sinusoidal and harmonically distorted waveforms. The frequent sampling (48 times per cycle per phase) allows precise calculations of true rms current. The sampling rate allows waveform measurements up to the 11th harmonic. True rms sensing avoids potential under- or over-protection problems associated with peak-sensing tripping systems.

The Power+ trip unit is identified by its plug-in modules and rotary switches. The optional “target module” provides LED targets for overload, short circuit and ground fault trips. View and Reset pushbuttons are also provided to monitor status, including a battery check LED. Standard 3-volt lithium batteries, in the target module, power the indicating LEDs (batteries are not required for trip unit operation). The “rating plug module” serves the dual purpose of establishing the trip rating for the circuit breaker as well as providing ground fault protection when required. All pickup and delay settings are selected with detented rotary switches.

MVT+

Enhanced MicroVersaTrip® Plus and MicroVersaTrip® PM trip units also measure true rms currents (and voltages for MicroVersaTrip® PM trip units). The higher sampling rate (64 times per cycle) allows waveform measurements up to the 31st harmonic to achieve accuracy of 99%.

MicroVersaTrip® Plus and MicroVersaTrip® PM trip units contain a digital liquid crystal display with a five-button keypad for local setup and readout of trip settings. The trip units have a lithium battery for cold setup capability and viewing of targets without external power. The LCD and keypad also provide a three-phase ammeter and trip indicators. The Enhanced MicroVersaTrip® (MVT) PM trip unit adds power management system capability, including advanced metering and protective delaying, to the basic functions of the MVT Plus.

The MVT PM can be interfaced with either Modbus RTU or Ethernet TCP/IP compatible systems. All trip units utilize a series of interchangeable rating plugs to establish the current rating of the breaker.

EntelliGuard Global Trip Unit

System reliability and protection are the key functions of any trip unit, and the new EntelliGuard TU delivers exactly that, along with the flexibility to address an array of power distribution needs.

The EntelliGuard TU can be used as a replacement for installed MicroVersaTrip® (MVT) and Power+® trip units. The conversion kit replaces those for the current ProTrip™ and MVT for the four previous generations of North American stored energy circuit breakers – Power Break I®, Power Break II, AKR and WavePro®.

It is the standard trip unit for the new EntelliGuard G available worldwide for GE and OEM equipment and for replacements for industrial and commercial switchgear and switchboards provided under UL, CSA, NEMA and IEC standards. The EntelliGuard TU will be common across all new product lines and as a replacement trip unit for installed GE circuit breakers around the world.

For a complete listing of the 150,000 parts and $12 million dollars of inventory Parts Super Center offers simply click here.

Back to the Index