Q&A on Transformer Knowledge

Today, the self-control system - Senge Technology will talk about a small question and answer about transformers.

1. What are the main components of an oil immersed transformer?

Answer: Iron core, winding, oil tank, oil conservator, respirator, explosion-proof tube, radiator, insulation sleeve, tap changer, gas relay, thermometer, clean oil, etc.

2. What is a fully insulated transformer? What is a semi insulated transformer?

Answer: Semi insulation refers to the main insulation of the winding near the neutral point of a transformer, whose insulation level is lower than that of the end winding. On the contrary, the insulation level of the first and last windings of a transformer is generally called full insulation.

3. What is the main role of transformers in the power system?

Answer: The function of a transformer in the power system is to change voltage to facilitate power transmission. After the voltage is boosted by a step-up transformer, it can reduce line losses, improve the economy of power transmission, and achieve the goal of long-distance power transmission. The step-down transformer can convert the high voltage into the required voltage levels for users, meeting their needs.

4. What does the oil conservator of a transformer do?

Answer: When the volume of transformer oil expands or shrinks with changes in oil temperature, the oil conservator plays a role in storing and replenishing oil, ensuring that the oil tank is filled with oil. At the same time, due to the installation of an oil conservator, the contact surface between the transformer and air is reduced, slowing down the rate of oil degradation. The side of the oil conservator is also equipped with an oil level gauge, which can monitor changes in the oil level.

5. Why does the iron core of a transformer need to be grounded?

Answer: During operation, the iron core and other accessories of the transformer are all located in the electric field around the winding. If not grounded, the iron core and other accessories will inevitably induce a certain voltage. Under the action of external voltage, when the induced voltage exceeds the discharge voltage to ground, discharge phenomenon will occur. To avoid internal discharge of the transformer, the iron core should be grounded.

The above is a summary of the knowledge about transformers by Senge Technology, an automatic control system.

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