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GC2010D-II Vehicle-mounted Transformer Oil Dissolved Gas Analyzer can Analyze 1
Use Argon as carrier gas, GC2010D-II Vehicle-mounted Transformer Oil Dissolved Gas Analyzer (Similar Portable DGA) can analyze 11 fault gases. That is:hydrogen(H2), oxygen(O2), nitrogen(N2), carbon monoxide(CO), carbon dioxide(CO2), methane(CH4), ethane(C2H6), ethylene(C2H4), acetylene(C2H2), cyclopropane(C3H6),Propane(C3H8).
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When to check capacitance and Tan Delta of the insulating materials?
1. During manufacturing process preferably at each stage.2. Depend on rate of change of Tan delta, Voltage, Time(Month/Year)3. Frequency of testing depends on history of past failures on same machine.4. Frequency of testing depends on environmental conditioins. More humidity, temperature, pollution would ...
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Purposes of the Capacitance and Tan Delta of the insulating materials?
1. Predict the future unexpected breakdown of the insulation of HV equipment.2. Plan the maintenance schedule.3. Repair the insulation before actual flashover, saving high cost of replacement of material which will reduce the iinventory well as delay in procurement at the last minute.4. After repair, ...
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Why to measure the Capacitance and Tan Delta of the insulating materials?
Electric properties of the insulating system change due to age and continuous electrical stress. The principal contributor to the unexpected breakdown of the high voltage equipment is the insulation failure. As compared to the magnetic, conducting and insulating materials which form the basics of any ...
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Oil Tan Delta Test
Oil Tan Delta test is also known as the Loss Tangent or Dielectric Dissipation Factor measurement. Tan Delta may be defined as the measurement of the cosine of the phase angle or the sine of the loss angle. It is basically the measurement of the leakage current through the oil, which in turn is a measure ...
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IEEE Guidelines for Power Factors
The IEEE has suggested guidelines for Power Factors depending on the type of oil and the unit it is being used in (IEEE C57, 06-1991). Some representative values are given below:
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Power Factor Test of Insulating Oil
The power factor of insulating oil equals the cosine of the phase angle between an AC voltage applied to oil and resulting current. Power factor indicates the dielectric loss of oil and, thus, its dielectric heating. The power factor test is widely used as an acceptance and preventive maintenance test ...
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Procedure of Measuring Dielectric Dissipation Factor
The details of the entire procedure are given in the ASTM D924 standard and are only briefly mentioned here. The measurements are made in specially designed cells that are machined to precise dimensions. The measurements are done at precise temperature, usually 25℃ and 100℃, thus the cells have to ...
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Significance of Dielectric Dissipation Factor
The dielectric loss factor relates to the inability of molecules in the insulating fluids to reorient themselves with an alternating electric field. This ability is dependent on the temperature of the sample, the size of the molecules involved, and their polarity. It is also dependent on the frequency ...
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Dielectric dissipation factor of transformer oil
Loss angle is an important property of transformer oil. In ideal dielectric material, the phase anlge between the voltage and current is 90. However, due to impurities, certain leakage current flows through the dielectric, the actual phase anlge is slightly less than 90. Becasue an angle is very low, ...
