Depending on the size of the transformer, several different types of insulator are used. These include varnishes, plastics, paper, and fabrics (to insulate the windings), wood (spacers), and oil. Transformer oil improves the insulation value of paper, fabrics, and wood when absorbed by them. The oil has a secondary purpose, which is to cool the transformer.
The effect of the insulation is to stop electric currents flowing where they should not.
The insulation of a current transformer can melt due to excessive heating caused by overcurrent conditions, which lead to high internal temperatures. This can occur if the transformer is overloaded beyond its rated capacity or if there is a fault in the electrical system, resulting in prolonged high current flow. Additionally, poor ventilation, inadequate cooling, or aging of the insulation material can exacerbate the heating effect, leading to insulation failure. Regular maintenance and proper system protection can help prevent these issues.
Basic materials to build a transformer are magnet wire, iron core and insulation material to separate the two windings.
The dc tests that can be done on a transformer are to measure the resistance of each windings and to measure the insulation resistance between the windings and between each winding and the transformer case.
What limits the use of a transformer is its operating temperature, as excessively-high temperature will act to break down its insulation. The temperature reached by a transformer is a function of its rating (expressed in volt amperes), so operating a transformer below its rating is perfectly okay.
its a type of transformer oil which provides insulation ...
To ascertain the life of insulation, or effectiveness of the insulation (HV to LV, HV to earth and LV to earth) of the transformer
The dielectric strenght of a transformer represents the maximum voltage permissible to apply across the transformer insulation i.e. between the transformer winding to another part of the transformer, normally the chassis or another winding and without break-down of the insulation ocurring (e.g. arcing). The breakdown voltage of a transformer represents a voltage that exceeds its dielectric strenght and that causes breakdown e.g. arcing across the insulation.
Knowing the power rating of a transformer will help an operator use the transformer within its design limitations with regard to heating of the windings and their insulation.
time and temperature dependence of the transformer oil and its insulation paper used
Because one of its main functions is to provide good insulation.
It depends on the rated voltage of the transformer winding -are you talking about a 12-V transformer winding or a 400-kV transformer winding? Obviously, there is no one answer to your question!
did u mean isolation transformers..?? if it is, it's already been answered..!!
The effect of the insulation is to stop electric currents flowing where they should not.
A megger would not be suitable for testing insulation resistance of a 13.2-kV transformer, as the transformer's voltage rating is significantly higher than the output voltage from a megger.
The insulation of a current transformer can melt due to excessive heating caused by overcurrent conditions, which lead to high internal temperatures. This can occur if the transformer is overloaded beyond its rated capacity or if there is a fault in the electrical system, resulting in prolonged high current flow. Additionally, poor ventilation, inadequate cooling, or aging of the insulation material can exacerbate the heating effect, leading to insulation failure. Regular maintenance and proper system protection can help prevent these issues.
If you exceed the rated voltage of your transformer, there is a high possibility that its insulation will break down and you will ruin that transformer.