Question

What is the formula for the length of the tank in transformers

Answer 1

Answer:

http://www.ymcaust.ac.in/electrical/images/transformer_design.pdf

Answer 2

Answer:

Concept :

The temperature of the transformer's core and coil rises as a result of losses. In lower capacity transformers, the ambient air will be able to adequately cool the transformer and keep the temperature rise well below acceptable bounds. Losses and temperature rise rise in proportion to the transformer's capacity increase. It might be necessary to blow air over the transformer to maintain the temperature rise within reasonable bounds. This is unwise because the insulation may be harmed by ambient air that contains moisture, oil particles, and other contaminants. The transformer is housed in a steel tank that is filled with oil to prevent atmospheric risks. From the core and coil to the tank walls, the oil acts as a heat conductor.

Explanation:

• The losses and temperature rise grow as the transformer's capacity rises. It could be necessary to blow air over the transformer to reduce the temperature rise.
• The transformer is set within an oil-filled steel tank to avoid the issue of atmospheric dangers. Heat is transferred from the core and coil to the tank walls through the oil.
• Additionally, when the transformer's capacity rises, the additional loss necessitates a larger tank or a greater dissipating area.
• These raise the need for space, oil volume, expense, and transportation issues. To get around these issues, the dispersing area will be artificially enlarged without increasing the tank's volume.
• Length of tank =  external diameter of h.v windings +distance between adjacent limbs + 2 × clearance between h.v windings and tank
• Tank length is determined by the distance between the neighbouring limbs, the external diameter of the h.v. windings, and the clearance between the h.v. windings and the tank.
• The formula for a three phase transformer is length of tank = 2*distance between adjacent limbs + external diameter of h.v. windings + 2*clearance between h.v. windings and tank. The distance between neighbouring limbs is not doubled in single phase transformers.

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