This paper introduces the oil dielectric loss tester. As an important tool, the oil dielectric loss tester is widely used in Power Supply Bureau, power plant and other places. The instrument uses a microcomputer to process information and data, automatically selects measuring range, and has high measuring accuracy. The frequency conversion technology has good anti-interference performance in external electric field. Sudden power failure in the process of boosting will not cause over-voltage. It is easy to operate and use.
In addition, the most advanced high-frequency induction heating mode is used in the heating part of the oil medium loss tester, which has the advantages of non-contact between the oil cup and the heating body, uniform heating, fast speed, convenient control, etc. The AC-DC-AC conversion mode is adopted for the AC test power supply to effectively avoid the influence of the mains voltage and frequency fluctuation on the accuracy of dielectric loss test. Even if the generator is used for power supply, the instrument can operate normally. The internal standard capacitor is SF6 gas filled three pole capacitor. The dielectric loss and capacitance of the capacitor are not affected by the ambient temperature and humidity, so as to ensure that the accuracy of the instrument is the same after long-term use.
Zc-211 precision oil dielectric loss tester is a new instrument newly developed by Zhizhuo measurement and control. It is designed and manufactured according to GB / t5654-2007 measurement of relative permittivity, dielectric loss factor and DC resistivity of liquid insulating materials. It is used to measure dielectric loss factor and DC resistivity of insulating oil and other liquid insulating media. It is an integrated structure, which integrates the main components such as dielectric loss oil cup, temperature controller, temperature sensor, dielectric loss test bridge, AC test power supply, standard capacitor, high resistance meter and DC high voltage source. The instrument is equipped with large screen (240 × 128) liquid crystal display, full Chinese menu, Chinese prompt for each step. The test result can be automatically stored and printed out, and the operator can use it without professional training.
The following is a brief summary of the characteristics of zc-211 precision oil dielectric loss tester:
1. The oil cup adopts a three electrode structure in accordance with the national standard GB / t5654-2007, with a gap of 2mm between the electrodes, which can eliminate the influence of stray capacitance and leakage on the dielectric loss test results.
2. The instrument adopts medium frequency induction heating and PID temperature control algorithm. The heating method has the advantages of non-contact between the oil cup and the heating body, uniform heating, fast speed, convenient control, etc., so that the temperature is strictly controlled within the preset temperature error range.
3. The internal standard capacitor is SF6 gas filled three electrode capacitor. The dielectric loss and capacitance of the capacitor are not affected by the ambient temperature and humidity, so that the accuracy of the instrument can still be guaranteed after long-term use.
4. AC-DC-AC conversion mode is adopted for AC test power supply to effectively avoid the influence of mains voltage and frequency fluctuation on the accuracy of dielectric loss test. Even if the generator generates power, the instrument can operate correctly.
5. Perfect protection function. When there is over-voltage, over-current, high-voltage short circuit, the instrument can quickly cut off the high voltage and send out a warning message. A warning message is issued when the temperature sensor fails or is not connected. A temperature limiting relay is set in the medium frequency induction heating furnace. When the temperature exceeds 120 ℃, the relay is released and the heating stops.
6. Convenient test parameter setting. The temperature setting range is 0-125 ℃, the AC voltage setting range is 500-2200v, and the DC voltage setting range is 0-500v.
7. Large screen LCD display with backlight and clear display. The man-machine interface is friendly, and the instrument can automatically test only according to the Chinese menu prompt and input command. And automatically store and print test results.
8. Equipped with real-time clock, test date and time can be saved, displayed and printed along with test results.
9. Empty electrode cup calibration function. Measure the capacitance and dielectric loss factor of the empty electrode cup to judge the cleaning and assembly condition of the empty electrode cup. The calibration data is saved automatically to facilitate the accurate calculation of relative permittivity and DC resistivity.
It can be seen from the above that the configuration of zc-211 precision oil medium loss tester is more humanized, intelligent and greatly improves the working efficiency of technical personnel. If there is anything unclear here, please feel free to consult our customer service personnel.
