What is the main purpose of a transformer?
A transformer is an electrical device designed and manufactured to step voltage up or step down. Electrical transformers operate on the principle of magnetic induction and have no moving parts.
Where are transformers used in everyday life?
Transformer is used in the construction of electrical measuring device such as voltmeter, ammeter, relay etc. 6. It is used for rectification. Rectification is the process of converting A.C to D.C. Rectification is important for high voltage transmission.
What are the 3 types of transformers?
There are three primary types of voltage transformers (VT): electromagnetic, capacitor, and optical. The electromagnetic voltage transformer is a wire-wound transformer.
What are the two main types of transformer?
The different types of transformer are step up and step down transformer, power transformer, distribution transformer, instrument transformer, single phase and three phase transformer, auto transformer, etc.
What are the main parts of transformer?
There are four primary parts to the basic transformer. The parts include the Input Connection, the Output Connection, the Windings or Coils and the Core. Input Connections – The input side of a transformer is called the primary side because the main electrical power to be changed is connected at this point.
Why is iron used in transformers?
In real transformers, the two coils are wound onto the same iron core. The purpose of the iron core is to channel the magnetic flux generated by the current flowing around the primary coil, so that as much of it as possible also links the secondary coil.
What is the basic principle of transformer?
A transformer operates on the principle of electromagnetic induction. It has a magnetic core over which two sets of windings, termed as primary and secondary, are suitably placed. When one of the windings is connected to an AC supply, an emf is induced on the other winding which is proportional to the number of turns.
Which oil is used in transformer?
mineral oil
What is the liquid in transformers?
Transformer oil or insulating oil is an oil that is stable at high temperatures and has excellent electrical insulating properties. It is used in oil-filled transformers, some types of high-voltage capacitors, fluorescent lamp ballasts, and some types of high-voltage switches and circuit breakers.
What is the most common liquid used in transformers?
Transformer oil
What is ppm in transformer oil?
PPM stands for Parts Per Million. It is used to measure the weight of moisture divided by the value of oil. The moisture content in oil lowers the insulating system dielectric strength that permits flashover to harm a transformer. For example, for mineral oil, a generally accepted maximum moisture content is 35 ppm.
What is BDV of transformer oil?
BDV stands for Breakdown Voltage. It is also called as dielectric strength value. It is the dielectric strength of transformer oil. This can indicates the presence of contaminants.
What is the power factor of transformer oil?
Modern oil-filled power transformers should have power factors of 0.5% or less, corrected to 20°C (68°F), for individual windings to ground (CH and CL) and interwinding insulations (CHL). The National Grid transformer specification states that the power factor of the insulation system shall not exceed 0.5% at 20°C.
What is minimum breakdown voltage of transformer oil?
30 kV
What is the color of good transformer oil?
Generally, oil that is yellow, orange, or even somewhat red in color is fresher and will work as intended. As oil ages, it transforms to a brown or black color and its efficacy diminishes.
What is the BDV value of transformer?
A typical value of BDV Test result for 220 / 6.6 kV Transformer oil is 65 kV and moisture content should be less than 10 ppm.
How do you detect the presence of water in transformer oil?
Anyone can easily calculate the actual mass of iodine participated in the reaction. From the first reaction, we get that 1 mole of iodine reacts with 1 mole of water. As per the experiment, you can calculate the weight of iodine and determine the exact quantity of water present in the transformer oil.
Which is the cause for deterioration of transformer oil?
The most predominant factors responsible for causing deterioration of transformer oil and subsequently failure of transformers are: 1) Development of internal pressure in the oil. 2) The rise in temperature during operating conditions. 3) Frequent change in operating voltage levels.
What is minimum flash point value of transformer oil?
What is Flash Point of transformer oil? At which minimum temperature the transformer oil gives of vapor to ignite in the air is called the flash point of transformer oil. Commonly the flash point of transformer oil/ insulating oil is 140 degree Celsius.