Description/ Specification of Transformer Oil Test KIt

341 wordsclear Humanize AI Transformer Oil is an insulating compound which is used to insulate conducting components from the non-conducting ones in high-voltage transformers. Also, the oil acts as a heat dissipater. Oil-immersed large transformers are capital plants involving enormous amounts of investment, and hence protection of these devices is a matter of top priority to the utilities that own them. For the safe operation of this equipment, the oil must satisfy tight quality requirements. The quality of the oil degrades with ageing, moisture ingress, contaminants, internal arcing, heating, etc. The basic parameters that are being monitored in the oil are breakdown voltage (BDV), specific resistance, dielectric dissipation factor (tan delta test), dissolved gas analysis (DGA), moisture content, viscosity, acidity, flash point, and a few more. Breakdown voltage is a measure of dielectric strength of oil. Test kits for oil are primarily for the measurement of breakdown voltage. It has become common in recent years to use portable test kits, which can be carried to the field very conveniently. Under-test oil is placed within a chamber where two electrodes are kept at a specified distance, and the test voltage is put across the gap. The applied voltage is slowly increased by way of a variac to determine at what voltage an arc jumps across the electrodes; i.e., the oil insulation between them breaks down. The experiment is done 5-6 times to achieve the consistency of readings, and the average reading is noted. Typically a BDV of 30 kV/cm is regarded as satisfactory. The source of power supply employed is 220V AC, 50Hz. Oil with less water content and impurities will yield higher results in the BDV test. The test kits today are microprocessor-based, computerized and have an LCD panel display, facility to generate and store test results, a printer inbuilt, a digital voltmeter and more facilities. This can be applied to test mineral oils or synthetic ester type oils. Many protections and interlocks are set up in the kit, like overvoltage, HV chamber door interlock (prior to applying voltage), etc. This page discusses the catalogues of firms that trade in transformer oil test kits. DECLARATION: TEXT CONTENT IN THIS PAGE IS AI GENERATED