▍ brief 　↴

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　　YLJH-7065Fully automatic oil medium loss and resistivity testerAdopting an integrated structure, it integrates the main components such as dielectric loss oil cup, temperature controller, temperature sensor, dielectric loss testing bridge, AC test power supply, standard capacitor, high resistance meter, and DC high voltage source together.Fully automatic oil medium loss and resistivity testerInternally using all digital technology, all intelligent automated measurements, andFully automatic oil medium loss and resistivity testerEquipped with a large LCD touch screen display and a fully Chinese menu interface prompt, operators can proficiently use it without professional training. Test results can be automatically stored and printed out.

Insulating oil is widely used in high-voltage electrical equipment such as transformers, oil circuit breakers, oil filled cables, power capacitors, and oil bushings. Its performance directly affects the normal operation of electrical equipment, so it is necessary to conduct relevant tests on insulating oil regularly. YLJH-7065Fully automatic oil medium loss and resistivity testerIt is a testing instrument developed and designed specifically for measuring the dielectric loss factor and DC resistivity of liquid insulation media such as insulating oil, in accordance with the requirements of the national standard GB/T5564-2007 "Measurement of Relative permittivity, Dielectric Loss Factor, and DC resistivity of liquid insulation materials" by Shaanxi Yilian Electric.

▍ Functional Features 　↴

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● The fully automatic oil medium loss and resistivity tester is based on the RAM9 platform, with high testing accuracy and fast speed.

● The fully automatic oil medium loss and resistivity tester adopts medium frequency induction heating and PID temperature control algorithm. This heating method has the advantages of non-contact between the oil cup and the heating element, uniform heating, fast speed, and easy control, which strictly controls the temperature within the preset temperature error range.

●The oil cup adopts a three electrode structure that complies with the national standard GB/T5564-2007, with a spacing of 2mm between electrodes, which can eliminate the influence of stray capacitance and leakage on the dielectric loss test results.

●The internal standard capacitor is an SF6 gas filled three-point polar capacitor, whose dielectric loss and capacitance are not affected by environmental temperature, humidity, etc., ensuring the accuracy of the instrument even after long-term use.

●The AC test power supply adopts AC-DC-AC conversion method, effectively avoiding the influence of mains voltage and frequency fluctuations on the accuracy of dielectric loss testing. Even if the generator generates electricity, the instrument can operate correctly.

●Empty electrode cup calibration function. Measure the capacitance and dielectric loss factor of the empty electrode cup to determine its cleaning and assembly condition. Calibration data is automatically saved for accurate calculation of relative permittivity and DC resistivity.

●Equipped with comprehensive protection functions. When there is overvoltage, overcurrent, or high-voltage short circuit, the instrument can quickly cut off the high voltage and issue a warning message. When the temperature sensor fails or is not connected, a warning message is issued.

●A temperature limiting relay is installed inside the medium frequency induction heating furnace. When the temperature exceeds 120 degrees, the relay is released and the heating stops.

●The experimental parameters are easy to set, with a temperature setting range of 0-120 ℃, an AC voltage setting range of 200-2200V, and a DC voltage setting range of 0-500V.

●Adopting a large screen TFT pure color LCD touch display, the display is clear, and with simple settings, the instrument can automatically perform tests and automatically store and print test results.

● Equipped with a real-time clock, the test date and time can be saved, displayed, and printed along with the test results.

▍ Technical Parameter 　↴

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● Power supply voltage: AC220V ± 10%
● Power frequency: 50Hz/60Hz ± 1%
● Measurement range: capacitance: 5pF~200pF
Relative permittivity: 1.000~30.000
Dielectric loss factor: 0.00001~100
DC resistivity: 2.5M Ω m~20T Ω m
● Measurement accuracy: capacitance: ± (1% reading+0.5pF)
Relative permittivity: ± 1% reading
Dielectric loss factor: ± (1% reading+0.0001)
DC resistivity: ± 10% reading
● Resolution: Capacity: 0.01pF
Relative permittivity: 0.001
Dielectric loss factor: 0.00001
● Temperature measurement range: 0-120 ℃
● Temperature measurement error: ± 0.5 ℃
● AC experiment voltage: 200-2200V continuously adjustable, frequency 50Hz
● DC test voltage: 0-500V continuously adjustable
● Power consumption: 100W
● Dimensions: 450mm × 410mm × 320mm
● Total weight: 25kg
● Operating environment temperature: 0 ℃~40 ℃
● Relative humidity used:<75%

▍ test method 　↴

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Due to the inherent reasons of the test sample, there are many factors that can cause errors in the oil medium loss value. The following test methods are extracted from the measurement standard for the dielectric loss factor of liquid insulation materials in GB/T 5654-2007 for reference only.

　　testing voltageThe AC voltage depends on the liquid being measured, with an electric field strength between 0.03 kV/mm and 1 kV/mm, using a sine voltage with a frequency between 40-62 Hz.

　　measureAfter the oil cup is filled with the oil sample, the measurement of the loss factor begins when the temperature difference between the inner electrode and the required test temperature is not greater than ± 1 ℃, and only voltage is applied during the measurement. After completing the initial measurement, pour out the oil sample and fill the oil cup with a second sample of the same oil. The operation process is the same as the first time, but the washing is omitted. Repeat the measurement after heating, and the difference between the two readings should not exceed the sum of 0.010% and 25% of the larger of the two measurements. If the requirements cannot be met, the same oil sample should be tested again until the difference between adjacent readings does not exceed 0.010% plus 25% of the larger of the two measurements. Only then will the measured results be considered valid. After Zui, take the lower of the two valid measurements as the loss factor of the liquid sample.

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　　Yilian Electric Manufacturer Professional StudentFully automatic oil medium loss and resistivity tester, resistivity tester, oil dielectric loss and resistivity tester,Rich product selection, manufacturer prices, professional electrical testing for 10 years, looking for insulation oil dielectric loss and resistivity testers, resistivity testers, oil dielectric loss and resistivity testers, choosing Yilian Electric to create high-quality electrical testing products.