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Research & Development

Pro Integris company carries out research and development projects in cooperation with scientific research institutions and professional partners.

We also conduct autonomous research, depending on the type of project. The goal of these activities is the development of the company in accordance with the current state of market and technology, increasing value and knowledge, competitiveness and opening new markets, as well as creating prerequisites for further growth of the company. When performing R&D, we use different partnership models and joint project applications for co-financing within available national and EU programs.

Our goal is the continuous growth and development of the company, and for this reason, research and development is an important segment of our business.

Smart Measuring Unit

SMU-P2 is a device that combines all types of measurement data within a digital transformer substation according to the relevant standards.

The concept of a fully digital substation means an efficient and simple exchange of measurement data through the process communication network, efficient use and storage of measurement data, and an increase in the energy efficiency of the transformer substation. Construction costs can be significantly reduced because signaling and measurement cables are not necessary.


220 x 182 x 88 mm

Analog inputs

4 x protection current inputs 1A or 5A
4 x measurement current inputs 1A or 5A
4 x protection and measurment voltage inputs 100V

Power supply

110 – 230 VAC and 110 – 230 VDC

Input signal frequency

50 Hz


1000Base – TX, VLAN


Generator protection by directly measuring the load angle

Name of the project:
Generator protection by directly measuring the load angle

Project description:
The goal of the project is to realize the out-of-step generator protection function by directly measuring the load angle. The purpose of the generator out-of-step protection function lowers the generator strain and the possibility of generator damage due to malfunctions mainly because the generator spends less time in highly unfavorable working regimes. The new concept of generator protection makes the generator fall off the grid sooner, thus directly enhancing the generator’s lifetime. The direct measurement of the generator load angle, in addition to being an input for generator out-of-step protection function, can be used to increase the generators’ scope of work (expansion of the generators’ capability curve), which contributes to the generator’s owner through more flexible production planning. The expansion of the generators’ capability curve based on the direct measurements of the generator load angle will also be looked into within the project.

Duration of the project: November 30th 2018 – November 29th, 2019

The project is co-financed by the Croatian Agency for Small Businesses, Innovations and Investments (HAMAG-BICRO) from the Proof of Concept Program.


Name of the project:
Promoting innovative cLusters and nEtworks for renewable energy synergies in Mediterranean cOasts and iSlands – PELAGOS

Project description:
The purpose of the PELAGOS project is to create and promote the national blue energy platforms in Portugal, Spain, France, Italy, Croatia, Greece and Cyprus, and subsequently the establishment and operation of the transnational Mediterranean cluster for the purpose of jointly finding opportunities and addressing the challenges of blue energy. Through the co-operation scheme, the synergy effect of promoting research, innovative ideas and competitive technologies related to blue energy in the coastal and island areas of the Mediterranean is to be achieved.

Blue energy platform participants are representatives of country administration offices (ministries, regional development agencies), research institutions, small and medium entrepreneurs, large companies, professional associations, non-governmental organizations and other participants who are specialized in activities related to blue energy and have an active role in the mentioned issues. The Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb (UNIZAG FSB) is the leader of the PELAGOS project platform for Croatia.

More details about the PELAGOS project can be found here.

Duration of the project: November 1st 2016 – July 30th 2019

The project is co-funded by the European Regional Development Fund.

Development of Smart Metering Unit (SMU)

Name of the project:
Development of a Smart Merging Unit for Smart Grid

Project description:
The aim of the project was to develop advanced solutions in the field of digital measurements of the protection systems, automation and control in secondary systems of power facilities. The final result of the project is the developed Smart Metering Unit (SMU) that has the ability to publish Sampled Values in accordance with IEC 61869 and IEC 61850-9-2 standards and synchrophasor measurements in accordance with IEEE C37.118 standards.

More details about the SMU can be found here.

University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb

Project duration: December 4th 2015 – December 31st 2017

The project was implemented with the financial support from the IRCRO program implemented by HAMAG BICRO.

Development of the Merging Unit

Name of the project:
Merging Unit – MU

Project description:
The most important result of this R&D project is the development of a functional model of the Merging Unit for the application in power system automation based on the IEC 61850 standard. The results of the project include the MU functional model that has the ability to publish SV streams according to the IEC 61850-9-2LE standard and the applications for the configuration, testing and monitoring of the MU. The goal of the project was to, by developing the MU, acquire knowledge and improve the existing technical solutions according to the technologies currently used in power systems.


FESB – Faculty of Electrical Engineering, Mechanical Engineering and Naval

IEL d.o.o., Zagreb

Project duration: January 15th 2010 – April 15th 2011

The project was implemented with the financial support from the IRCRO program implemented by HAMAG BICRO.