General Information:
HJD Series Transformer Oil Capacitance & Tan Delta Tester, also called Automatic Precision Oil Dissipation Factor Tester, which conforms to IEC 60247 and national standard GB/T5654-2007, widely used to test capacity,dielectric loss factor, DC resistivity of insulating oil and other insulating liquids. Integrated by dielectric loss oil vessel, temperature controller, temperature sensor, test bridge, AC power supply, reference capacitor, DC HV source and etc advanced measuring principle and digitization technology, HJD makes your operation be more easy, convenient and fast.
Features:
1.The test cell adopts the three-electrode structure according to national standard GB/T5654-2007, with electrode spacing 2mm, which can eliminate the effects of the stray capacitance and leakage on dielectric loss test results. The device is equipped with the oil drainage solenoid switch, and we can empty the test cell without removing it and rinse it with the test sample oil.
2.The instrument adopts the medium frequency induction heating, PID temperature control algorithm. This heating method has the advantages of non-contact between the test cell and the heating body, uniform heating, fast speed, convenient control, and strictly control of the temperature within error range of the preset temperature.
3.Internal standard capacitor is SF6 gas-filled three-electrode capacitance, and its capacitor dielectric loss and electrical capacity are not affected by ambient temperature, humidity etc, so that the instrument accuracy can be ensured even after prolonged use.
4.AC test power supply uses AC-DC-AC conversion, which effectively prevents the fluctuations in mains voltage and frequency from affecting the dielectric loss measurement accuracy. Even a generator, the instrument can work properly.
5.Perfect protection function. When there is over voltage, over current or high-voltage short circuit, instruments can quickly cut off high voltage, and issues a warning message. When the temperature sensor failure or not connected, the instrument will also issue a warning message.
6.There is a temperature limiting relay in the medium frequency induction heating furnace. When temperature above 120 degrees, the instrument releases the relay and stops heating.
7.Convenient test parameter setting.Temperature setting range 0～125℃, AC voltage setting range 500～2200V, DC voltage setting range 0～500V.
8.Using of large-screen LCD display, with backlight and clear display. Friendly interface, simply follow the menu prompt, enter the command, the instrument can be automatically tested. And automatically store and print test results.
9.Built-in real-time clock, the test date and time can be saved, displayed and printed with the test results.
10.Empty electrode cell calibration function. The capacitance and dielectric loss factor of the empty electrode cell are measured to determine the cleaning and assembly of the empty electrode cell. Calibration data is automatically saved to facilitate accurate calculation of relative permittivity and DC resistivity.
