[2024] All About Winding of Transformer Explained in Detail

    Transformer winding is one of the most important part of the transformer and formed by different turns of copper or aluminium coil bundled together wound on transformer core. The number of turns of winding of the transformer depends on the input and output supply voltage and it's thickness depends on amount of current to be carried through it.

    The winding generates MMF which are transferred to another winding to have different voltage level. Bare winding is provided with enamel coating and insulation to avoid each turn to come in contact. Press board and cotton insulation is used to support the winding.

Requirement for Transformer winding

    The important requirement for transformer winding has been listed below.

1. It must be economical in terms of availability of material and efficiency.
2. The heating condition of the material used must meet the standard temperature requirement.
3. It must be mechanically stable to withstand resultant force due to sudden short circuit.
4. Its electrical strength must be adequate to withstand the over-voltage surges.

Resistance of Transformer Winding

    The transformer resistance are measured to know the assembling, poor design, maintenance and overloading on a transformer. The transformer winding resistance will assures every winding is properly connected. Transformer winding resistance will change because of loose connection, shorted turns e.t.c. Megger is used to measure the resistance of the transformer winding.

Temperature of Transformer Winding

    Transformer winding is highly effected by the temperature. When load on a transformer increases, the temperature of the winding also increases which can damage the winding insulation resulting short circuit between the turns of the winding. Hence, winding temperature indicator ( WTI ) is used to measure the temperature of the winding to operate the trip, alarm and cooler circuit.

Types of Transformer Winding

    Transformer winding are classified into two categories which are listed below.

1. Primary Winding - Connected to Source
2. Secondary Winding - Connected to Load

    Types of winding used for core type transformer are listed below.

1. Cylindrical Winding
2. Helical Winding
3. Crossover Winding
4. Disc and Continuous winding

    Types of winding used for core type transformer are listed below.

1. Sandwich Winding

Conclusion

    Hope, you have clearly understand about the winding of the transformer, its requirement, resistance, temperature and types. Make sure to leave your opinion and suggestion about this post in the comment section below.