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Eaton’s Next Generation Trip Unit makes it easier to Test Circuit Breakers

Eaton has launched its next generation trip unit for the global market – the Power XpertIZMX-PXR Release (PXR) platform – which enables engineers to test and configure circuit breakers from a PC via a USB port.


It is integrated into the power management company’s IZMX air circuit breakers. As a result, it is easier for users to interact with the trip unit and store test data, thereby improving control and maintenance regimes.

High current circuit breakers – for example those used in high power distribution systems in industry – are configured and periodically tested by end users to ensure they continue to work reliably in the case of over-currents, and therefore prevent expensive downtime. This new unit allows technicians to simulate short circuits and overloads using Eaton’s Power Xpert Protection Manager (PXPM) software tool, which can be downloaded at no charge.

“The unit has been developed in response to users demand for an easy-to-use system. Previously testing and configuration was being done through the use of expensive hand-held test tools” said Maphuti Levy Moholola, Product Manager Power Distribution Components. The biggest benefit to customers is the saving on the cost of test equipment. “It is now even easier to interact with the trip unit through a laptop which can be used to upload and download electrical parameters therefore there is no longer a need to use hand-held tool kits.” Moholola added.

While the PXR technology presently supports testing and configuration of Eaton’s IZMX air circuit breakers, the new electronic trip unit is the platform for the future and will be integrated into all Eaton’s moulded case circuit breaker ranges and medium voltage circuit breakers, to set a new high standard for testing in all circuit breakers

New features of PXR technology-equipped IZMX devices include the ability to capture current and optional voltage waveforms along with minimum and maximum values for the phase and neutral conductors. In addition, the waveform can give an indication of the overall quality caused by harmonics, and metering accuracy is now one per cent. The higher resolution dot matrix display has been enhanced to be always active, constantly displaying the status of zone selectivity (ZSI), battery condition and rated current. All data can be transferred via Modbus, Profibus or Ethernet communication function and for security, a password can be added to avoid unauthorized changes. In addition, a QR code has been added for easier identification and to access additional information.

“At Eaton we are dedicated to helping users increase the safety of their personnel and providing reliability of our equipment” continued Maphuti. The optional Arc flash Reduction Maintenance System (ARMS) function also reduces the tripping time and energy to further protect maintenance personnel. Moreover, the Arcon system controls an arc within 2 ms before it reaches the maximum current and the Diagnose System enables permanent thermal monitoring of the low-voltage main switch boards. Together these systems enable any emerging errors to be detected as they originate so they can easily be dealt with before they pose a risk to operators or equipment.”

To learn more about Eaton, visit www.eaton.co.za

Eaton’s electrical business is a global leader with expertise in power distribution and circuit protection; backup power protection; control and automation; lighting and security; structural solutions and wiring devices; solutions for harsh and hazardous environments; and project design services. Eaton is positioned through its global solutions to answer today’s most critical electrical power management challenges.

Eaton is a power management company that provides energy-efficient solutions that help our customers effectively manage electrical, hydraulic and mechanical power more efficiently, safely and sustainably. Eaton has approximately 96,000 employees and sells products to customers in more than 175 countries.







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