The HVDTL Insulating oil dielectric loss and resistivity tester, is designed and manufactured based on GB/T5654-2007 of (Liquid insulating material of relative permittivity, dielectric loss factor and DC resistivity measurements). It is used for measuring dielectric dissipation factor and DC resistivity of insulating oil and other insulating liquids.
The instrument is characterized by integrated structure, and integrates test cell, temperature controller, temperature sensor, dielectric loss test bridge, AC test power, standard capacitor, high resistance meter, DC high voltage source and other major components. The instrument adopts full digital technology and all of the intelligent automatic measurement and the test results can be automatically stored and printed.
The instrument adopts the medium frequency induction heating, PID temperature control algorithm
This heating method has the advantages of the non-contact between the test cell and the heating body, even heating, fast speed, convenient control, strict control of the temperature within error range of the preset temperature.
Internal standard capacitor is SF6 gas-filled three-electrode capacitance, and its capacitor dielectric loss and electrical capacity is independent of ambient temperature, humidity and other effects, so that the instrument accuracy can be ensured even after prolonged use.
AC test power supply using AC-DC-AC conversion, effectively avoid the fluctuations in mains voltage and frequency on dielectric loss measurement accuracy effect.
There is a temperature limiting relay in the medium frequency induction heating furnace. When temperature above 120 degrees, the instrument frees the relay and stops heating.
Built-in real-time clock, the test date and time may be saved, displayed and printed with the test results.
The test results of each step can be automatically stored and printed.
Over voltage over current or high-voltage short circuit protection function
