The insulating oil tan delta test is an important way to determine the condition of transformer insulation. High tan delta values indicate that the insulation is deteriorating. The GTD-61A automatic oil tan delta & dielectric loss tester is highly automated, allowing the measurement of temperature rise, dielectric loss, and resistance to be completed all in one go. It uses medium-frequency induction heating and a PID temperature control algorithm.
Resistance Measurement
Using a tan delta tester allows you to easily see whether the insulating oil has deteriorated over time. This test method can also detect other factors that affect the quality of transformer oil such as contamination and ageing. The tan delta tester measures the dissipation factor and resistance of the insulating fluid in a power circuit with a high-frequency AC voltage. The results are shown on a clear LCD display.
It also features a powerful resistivity resolution of up to 0.001 MO*m, making it ideal for detecting subtle changes in the insulating Dielectric oil tan delta meter. It also includes a calibration checker, so you can validate the tan delta and resistivity measurements. It comes with PowerDB Lite, Megger’s asset and data management software at no extra cost, which makes it easy to download and print the results of your tests. This tan delta tester can also detect and report on any faulty connections. This ensures that your results are valid and reliable.
Temperature Measurement
The tan delta test is a precise and dependable method of assessing the quality of transformer oil. It evaluates the tangent of the transformer fluid’s dielectric loss angle, which is important for determining its capacity to absorb and dissipate electric energy. The test results can provide valuable information on the state of insulating oil and can help to determine when it is necessary for replacement or regeneration. This is essential for ensuring the insulating capacity of high voltage equipment such as power transformers, capacitors, and motors.
This automatic instrument is equipped with three-electrode type structure, and the inter electrode spacing is 2mm. This can eliminate stray capacitance and leakage effect on the test results. It adopts medium frequency induction heating and PID temperature control algorithm. It has the advantages of non-contact between oil cup and heating body, uniform heating speed, convenient operation, and the accuracy of control in temperature within the preset error range. It can complete all the procedures including heating, measuring dielectric loss, and measuring resistivity automatically.
Tan Delta Measurement
Tan delta testing allows for non-destructive, quick and easy assessment of the quality of insulating oil. This provides valuable insight into the level of contamination or degradation in a high voltage apparatus and enables operators to take appropriate maintenance measures.
Unlike solid insulation testers, tan delta testing of insulating oils can be performed without the need for extensive disassembly or sampling. This enables tests to be carried out more frequently and enables a more comprehensive inspection of the condition of dielectric insulation systems such as power transformers, instrument transformers, bushings, capacitors, and large rotating machines.
The OTD provides a comprehensive test solution for the insulating oil industry by measuring tan delta, resistance and relative permittivity in one unit. It also features a built in calibration checker and comes complete with PowerDB Lite, Megger’s asset and data management software to maximize productivity within the laboratory. Test standards are available that can be applied to both new and aged insulating oils to make evaluation of tan delta results simple and straightforward.
Resistivity Measurement
We are a renowned Manufacturer, Exporter and Supplier of Oil Tan Delta & Resistivity Test System located in Dombivli. This tester is designed to determine the insulating oils desperation factor / loss angle by applying a stress voltage to the under test oil. It is fully automatic and allows for tests to be conducted according to pre-defined standards or user specified procedures accessible in the setup menu.
A high tan delta value indicates poor quality oil. The tan delta measurement is also very sensitive to small changes in the characteristics of the oil, including moisture content. The measurements are made at ambient and high temperatures. Measuring the tan delta at high temperature can reveal ionic contamination that may not be detected when measured at ambient temperature.
The insulating oil tan delta and resistivity testing process is performed automatically, making it a very convenient instrument. This is due to the fact that the heating, measuring of the tan delta and resistivity, and evaluation of the test results are all completed at one time without any personnel involvement in the process.
The Bottom Lines
Dielectric oil tan delta meter is an instrument used for measuring the loss factor, power factor, and DC resistivity of transformer oils. It can be conducted either on the live transformer with oil inside or by taking a sample and testing in a lab.
