This research presented the details of design and constructions of tesla transformer for testing insulator. The out put of the tesla transformer has a rate of 120 kV and 120 kHz. Tesla transformer consisted of primary coil and secondary coil which is wound on a PVC insulating chamber and use air insulation in part of coaxial. The Rotary Gap is rotated eletrode which use for increasing efficiency of voltage generation. This paper presented the details of design and constructions are explained. And compare the tesla Transformer reproduce which is created the voltage at 120 kV and frequency 120 kHz for used in HighVoltage Laboratory Faculty of Engineering Rajamangala University of Technology Para Nakhon.

This paper presents the analysis of electric field by using FEMLAB simulation tool to find the optimal electric field and component designs. Design of Cable terminator is tested by finding PD Value with IEC standard. This paper also proposes the electric stress when we design the cable terminator includes SF6 insulator. The modeling design is very useful for High Voltage engineers to find the optimal solution of Cable terminator design.

This paper presents a testing of three insulators namely solid fluid and gas for choosing the best electric insulators. In order to generate the ozone gas the insulator must be selected in electrode set. Nowadays the insulators do not have the optimal test procedure for getting total efficiency. Therefore in this paper a design of ozone generator is proposed by using the fundamental of electric field stress. The ozone generator is a coaxial cylindrical electric type that has solid insulator in center of glass tube. This solid insulator will be dielectric among the high voltage electrodes. Ozone gas will generate in this air gap. This paper also focuses on the insulator testing of three insulators. It will find the efficiency of 3 insulators and compares them with the density and stress of ozone gas. The experimental results show the performance and ensure the optimal ozone generator design.

This research is presented by the designing and constructing test package that are divided into three types; the liquid insulator solid insulator and gas insulator. These materials are provided by in country in order to construct the test package for the results of expected to have at least error. This leads to reliability and validity in this study. The design of the liquid insulator of test package was conducted by the standard IEC 156 in which the material tested used oil transformer. Additionally its solid insulation was the range of catching objects and adjusting using the sheet of bakelite. Furthermore its gas insulation used acrylic was consisted of gas inside oxygen of pressure at 2 Bar. Three types of test could be supplied AC high voltage to test package causing of breakdown via insulators. After that taking note the value of breakdown was the liquid insulator of test material at 29.86kV its solid insulator at 36.32kV and its gas insulator (oxygen) at 48.40 kV

Diode high voltage the equipment assembles. That have necessity and important for a room practices for test experiment research and for the instruction. But diode high voltage to bring an element in a room practices something still must buy from the foreign countries and expensive. This problem corrects by designing and establish by oneself. This project has designed and build to diode high voltage for a laboratory by diode high voltage 100 kV. That can bring assemble all circuit get the circuit voltage multiplier etc. Building from the inventory at can seek can buy in house diode high voltage. That design and build that is the series diode on print circuit and electric oil insulator. Base principle of diode data technical of the components for applies in designing. The way builds to diode high voltage diagnose of designing builds consider the test diode high voltage the office designs. Which test has followed the objective is pass the power frequency withstand voltage test 120 kV 22 mA