This paper reports the critical reviews on gassing tendency of different insulating fluids along with precautionary measures to be considered during their fault diagnosis in transformer insulation. The experimental techniques and procedures for identifying due electrical thermal stress stray phenomenon has been elucidated. interpretation schemes used determining faults transformers results unex...

The development of power electrical systems causes attention to accuracy of protection elements and measurement values. So we need some new measuring devices with high accuracy for power transmission lines. One of these devices is Optical Current Transformer (OCT). Optical current transformers are suitable for power system protection and can replace the magnetic current transformers. In this pa...

The input and output transformers are among the most critical components in the design of a multi-octave amplifier. The total performance of the amplifier (linearity, efficiency, VSWR, gain flatness) will depend on their quality. Transformers with high impedance ratios and for low impedances are more difficult to design in general. In the transmission line transformers very low line impedances ...

Introduction This application guide addresses the limiting conditions of connecting transformers in parallel and loading considerations when turn ratios, impedances, and kVA ratings are different. Most transformers installed in parallel have the same kVA, turn ratios, and impedances, which can make it difficult for power engineers in industrial and commercial facilities to understand circulatin...

Condition assessment for critical infrastructure is a key factor the wellbeing of modern human. Especially electricity network, specific components such as oil-immersed power transformers need to be monitored their operating condition. Classic approaches condition have been proposed in past, dissolved gases analysis and respective concentration measurements insulating oils. However, these canno...

In this paper we propose transformer-based solutions to several power quality problems. Elsewhere we have shown how to solve the acoustical noise emission problems. In this paper we introduce toroidal transformers with reduced inrush currents, transformers with reduced electromagnetic emissions, and other transformers useful to reduce the transfer of harmonics. With the low-inrush transformers ...

The aging of power transformers causes several defects and damages in the insulating system, especially paper. degradation paper generates dissolved gases oil, which are measured by gas chromatography used as an indicator insulation status. state can be identified based on degree polymerization (DP) measurement. In some cases, when measurement DP is difficult, estimating accomplished through ga...