The majority of power workers in the work, often need to use the dielectric loss tester, the device is widely used in the power industry, so specifically what are the main applications of the dielectric loss tester? Dielectric loss tester is widely used for dielectric loss measurement of transformers, transformers, bushing, capacitors, lightning arresters and other equipment in the power industry.
Dielectric loss insulation test can effectively detect the overall damp deterioration of electrical equipment insulation, as well as local defects, etc., widely used in electrical manufacturing, electrical equipment installation, handover and preventive.. Anti-interference medium loss tester adopts frequency conversion power supply technology, using single chip microcomputer and electronic technology for automatic frequency conversion, analog/digital conversion and data operation, to achieve strong anti-interference ability, fast testing speed, high precision, simple operation function.. Frequency conversion power supply adopts high power switching power supply, output 45Hz and 55Hz pure sine wave, automatic pressure, can provide up to 10kV voltage; Automatic filter 50Hz interference, suitable for substation and other large electromagnetic interference field test.
After the high voltage set value starts to measure the frequency, the PID algorithm output delay frequency power is adjusted to the set value, to the high voltage measurement circuit measured frequency power, low voltage adjustment, accurate high voltage output. The forward/backward wiring is set, the current input range is automatically selected and switched according to the test measurement circuit, the Fourier transform circuit is measured to filter out the interference, the fundamental wave signal is separated, and the standard current vector is calculated on the current sample, the capacitance Angle difference is calculated on the amplitude of the TG δ. The measurement is repeated several times, and the intermediate results of the ordering are selected. At the end of the measurement, the measuring circuit sends a command to delay the frequency power down to 0V.
In the 10kV side of the power supply of the high voltage system, the high voltage is divided into two channels, one of which is fed into the machine for standard and capacitor CN. The dielectric loss of the capacitor is very small, and the dielectric loss can be considered as zero, that is, the pure capacitive current, which can be used as the capacitive current as the reference. On the side of Cx test, the test current is collected into the machine through a resistance R of data sampling, which can be decomposed into different components of technical horizontal and vertical direction, as shown in Figure 2. Tg δ value can be obtained by analyzing the ratio relationship between the horizontal and vertical components of computing power.
Dielectric loss tester is widely used in the electric power industry. The majority of electric power workers need to master the principle and application of this equipment, and get twice the result with half the effort in their work.
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