Eaton NZM-PXR – The new digital NZM circuit breaker is here. Compact, Reliable, Innovative

Eaton‘s NZM series circuit breakers cover rated currents of 20 to 1,600 A – with only four frame sizes. And they are also optimally matched to each other. The wide range of possible applications covers every need. Eaton took a close look at what customers really want and designed the product accordingly.

What stands out, for example, is the comprehensive system of accessories, which can be individually assembled and easily installed inside the control cabinet and in line with specific application requirements. The same goes for the flexible terminals, which

offer increased safety for operators thanks to the variety of available covers.

The circuit breakers are thus suitable for universal use – from small distribution boards to machine controls and motor-starter combinations, and all the way to large power distribution systems with a short-circuit breaking capacity of up to 150 kA.

With the Power Xpert Release (PXR) Eaton has developed a new platform for trip units. This technology has already been integrated in the IZMX series of air circuit breakers, and is now also available for the compact circuit breakers of the NZM series.

The PXR is a powerful trip unit for professional users. Our customers’ greatest possible benefi t is always our main priority. Therefore, the PXR combines easy handling across all frame sizes with state of the art technology, a wide range of practical functions and, as always, a proven safety record.

The PXR technology makes it possible to confi gure and test the circuit breakers from a PC via a USB port. This makes it very easy to access the information generated by the switchgear, to save the test data and to print it. This is the fastest and most convenient way to continuously improve control and maintenance systems. All sensitive data and settings are password-protected to prevent unauthorized access.

What the PXR is capable of:

One design for all products

The consistent design for all product groups and the clear, ergonomic arrangement of the various elements ensures that the operation is the same operation and confi guration of the PXR across the whole range of compact and open circuit breakers.

Now also with LED light for status and overload indication

A green-red dual LED indicates the current status: In start-up mode, the LED is permanently green. Green flashing indicates normal operation. Red fl ashing indicates an error in the electronic trip unit (tripping unit). The overload LED indicates the load status of the circuit breaker. This warning can also be transmitted via the integrated communications. The PXR20 is fixed at 80 % and 105 % of Ir. The PXR25 has same default-values as the PXR20, but in this case they can be adjusted as required.

Everything under control – thanks to the high-resolution display

The high-quality, full graphic display features a premium pixel matrix for enhanced contrast and brightness. The uniform menu navigation has been designed for maximum user-friendliness.

Always the right setting

The new NZM is fully adjustable over an extended range. The customary PZ2 screwdriver can still be used. The VX trip unit of the NZM2 can now also be set for the instantaneous release range. In addition the NZM2 now comes with optional ground fault protection.

The PXR – a real knack for connectivity

The PXR electronic release uses the modern communications platform provided by the CAM interface and the internal Modbus RTU module, with possible connections to numerous systems such as PROFIBUS, Profi Net, Modbus TCP etc.

Energy metering with the digital NZM:

Measurement data for ISO 50001

With Class 1 energy-metering accuracy in accordance with IEC 61557-12

Greater efficiency with ISO 50001

The EN ISO 50001 standard was defi ned at the international level to facilitate the implementation of in-house energy management systems. The most important aim of the standard is the sustainable reduction of energy costs, Energy consumption and CO2 emissions by means of organizational and technical changes. Both for globally connected companies and for small and medium-sized businesses, sound energy management can lead to enhanced cost transparency and cost savings, while also contributing to the protection of natural resources and to a better corporate image. Especially for power-intensive companies whose consumption exceeds 10 GWh, or whose electricity costs account for more than 14 % of the value added, the German Renewable Energy Sources Act harbors enormous cost reduction potentials in the form of lower energy taxes.

The importance of accurate metrics and analytics

Prerequisites for introducing an energy management system in accordance with ISO 50001 are accurate energy metrics, the identifi cation of the main Energy consumers and a full analysis of the company’s energy costs. This creates a sound foundation for realizing concrete energy-effi ciency improvements. Eaton offers a broad range of innovative products for monitoring, measuring and analyzing energy data.

Product cost effi ciency through precise measurement

To compete in today‘s markets, cost-optimized products must be manufactured. By measuring the energy requirements of production machines, the energy costs incurred for the production of the individual product can be precisely calculated. The more precise the measurement, the more precise the calculation of the proportional energy costs of the individual product. Especially when large  production volumes and short cycle times come together, a very precise measurement is profi table, as incorrect values will otherwise falsify the cost calculation.