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X-Ray imaging is an important Non-Destructive Testing technique for products including circuit boards, concrete, metal parts and assemblies. X-Ray test in our company is used to:-
• Verify presence and connection of hidden components.
• Find cracks, voids or other flaws in insulators.
• Perform critical dimensional measurement.

Gas leakage can reduce the life span of insulators. We use Gas Leakage Test mainly to visualize the leakage of gas in insulators such as the SF6 insulators. It is also used to check the pressure of SF6 gas in insulators.

Partial discharge causes progressive deterioration of insulating materials, ultimately leading to electrical breakdown. Data obtained through Partial Discharge Testing and Monitoring provide critical information on the quality of insulation and its impact on overall equipment health. Partial Discharge Testing results help us to predict future performance and reliability of our insulators. Hence, partial discharge measurement is a suitable method to detect and localize imperfections in the high voltage insulators and provides a procedure for quality assurance of electrical equipment.

Insulators must be capable of withstanding over voltages during operation which affects both their life and reliability. High Voltage Test is used to test the withstanding capacity of insulators. The test is used for the measurement of capacitance, power factor or total dielectric loss, breakdown voltage and flash-over voltage. In High Voltage Testing, the voltage applied is double the normal voltage but less than the breakdown voltage.

Faulty capacitance may have a short circuit, an open circuit or may physically deteriorate to the point of failure. Capacitance Test is used to measure the capacitance of component parts of insulators.

Glass Transition Temperature is the temperature range where a thermosetting polymer changes from a hard, rigid or “glassy” state to a more pliable, compliant or “rubbery” state. Insulators which are exposed to a temperature below the Tg, exhibit higher physical strength and stiffness, as well as greater electrical insulation, dimensional stability and chemical resistance than they do above their Tg. So the insulation material will undergo Glass Transition Test to check that the temperature is below Tg.

The insulators used in different applications should bear a certain mechanical load. The Bending Test is carried out to ensure that a metal has sufficient ductility to stand bending without fracturing.

Megger Test is a method of testing by using an insulation resistance meter that will help to verify the condition of electrical insulation. The main advantage of the Megger Test is that it is non-destructive. Megger Test shows the amount of moisture and the leakage currently on the moist or dirty areas of the insulators.

Temperature Cycle Test is used to determine the existence of thermal coefficient mismatches and the sensitivity of these mismatches to repeated temperature excursions. In this test the insulator is evaluated at different temperatures. After this test there should not be any damage or deterioration in the glaze of the insulator’s surface.

Impact Test is used to check the mechanical strength or toughness of the insulators. It is very important in governing the life of insulators.