Thanks to frequent usage of plastics, ordinary materials were almost replaced from cable industry. But the term - plastics is often connected with the risk of fire, especially if these materials are used in proximity of explosive atmosphere or other flammable substances (mainly in&...

Power transformers play an important role in the electrical networks of each state, and from an economical point of view, they are an expensive investment. To maintain the safe and reliable function of transformers, it is necessary to have actual information. For these reasons ...

Risk management is an integral part of every state-of-art production enterprise because running enterprises always go with various kinds of risks. Therefore, it is necessary to develop and improve ways of implementation of a risk control system into enterprise processes. Risks are suppo...

A sealing is defined as an element, which should to prevent water or gases infiltration by gaps created during connections between different compounds. Sealing compound properties is possible to carry out e.g. using dynamical mechanical analysis. From the point of accuracy of the m...

This paper is focused on thermal aging and accompanied partial discharge diagnostics of two mainly used resin rich mica tapes, which are utilized as a part of insulation system of large rotating machines like turbo or hydro generators. The first tested specimen was mica compos...

Partial discharges measurement is an important method for diagnostics of high voltage machines. The insulating system of power transformers is created by the solid and the liquid part. In these parts is the method used for detection of non-homogenous areas, failures and defects. Th...

The paper deals with optimization of printed circuit board assembly (PCBA) design based on defects per million opportunities (DPMO) metric. Due to DPMO data predictions for a given new PCBA design is possible to optimize its layout in terms of yield and quality even before...

This article deals with intermetallic layers which occure at the interface between solder and soldered material. To eliminate hazardous materials, only lead-free alloys, excluding special exemptions, are used today, not only in the Europe Union. Therefore, observing of creation of intermetallic&#...

The impact of the fast voltage impulses on the reliability of insulation systems has been in the centre of interest for years. Till now, a negative impact of the fast voltage impulses have been documented and quantified. The reliability of the insulation is usually compared&#x...

The article deals with results of solderability testing of printed circuit boards. The wetting balance test was used for solderability testing. This test makes wetting force measurement possible as a function of time. Measured values are recorded automatically. Surface roughness is one ...

This paper contains very important facts about thermal analyses and degradation processes of electro-insulating materials. This area is a very important part of electrical engineering. Insulating material can be exposed to various kinds of stresses. By the help of thermal analyses we ca...

The investigation of environment influence onto each system is important discipline. The knowledge of environment influence on the properties of materials is important by reason of correct function of systems. Materials, which are used in electrical engineering such as insulating and constru...

The paper presents a description of theoretical solutions in the sphere of optimizing control of technological processes and subsequent analysis and application of the chosen control approach on the process. The basic notions and approaches associated with problems of processes optimizing an...

This paper deals with polymeric composite dielectrics, which are filled with nano- or nano/micro- particles. It is focused on electric properties of several nanocomposite insulating systems. It is described breakdown strength, voltage endurance, permittivity, loss factor, space charge, partial di...

The article deals with solderability testing in the inert atmosphere. The article also includes comparison of tested samples and the influence of the inert atmosphere. By reason of implementation of inert atmosphere into the soldering process it is necessary to apply the inert atmo...