Publish Time: 2023-07-25 Origin: Site
power transformers are crucial devices that transfer electrical energy from one circuit to another without changing the frequency. They are widely used in power generation, transmission, distribution, and industrial applications. However, power transformers are also subject to various stresses and faults that can damage them and affect their performance. In this article, we will explore what power transformers are, how they work, and how to maintain them.
What are the Main Features of power transformer?
What are the Characteristics of power transformer?
How to Maintain power transformer?
A power transformer is a static device that consists of two or more coils of wire wrapped around a magnetic core. The coils are called primary and secondary windings, and they are electrically isolated from each other. When an alternating current (AC) flows through the primary winding, it creates a magnetic field that induces a voltage in the secondary winding. The ratio of the number of turns in the primary and secondary windings determines the voltage transformation. For example, if the primary winding has 100 turns and the secondary winding has 50 turns, the voltage in the secondary winding will be half of the voltage in the primary winding.
1. Voltage regulation: power transformers can adjust the voltage level according to the load demand and reduce the losses in transmission and distribution lines.
2. Isolation: power transformers can isolate different circuits and provide protection from short circuits, overloads, and faults.
3. Efficiency: power transformers have high efficiency (up to 99%) and low maintenance costs compared to other types of transformers.
4. Flexibility: power transformers can be customized to meet different specifications and requirements of customers.
5. Reliability: power transformers have a long lifespan (up to 30 years) and can operate under harsh conditions.
1. Checking the oil level in the main tank and conservator tank using a magnetic oil gauge (MOG). If the oil level is low, oil should be filled up to the specified level.
2. Checking the color of silica gel in breather. If the silica gel is pink or white, it means that it has absorbed moisture from the air and needs to be replaced or regenerated.
3. Checking for any oil leakage from any point of the transformer. If any leakage is found, it should be stopped using sealants or gaskets.
4. Checking the oil quality using various tests such as breakdown voltage test, acidity test, moisture content test, dissolved gas analysis (DGA), etc. If the oil quality is poor, it should be filtered or replaced.
power transformers are vital components that enable efficient and reliable power delivery across various sectors. They have many advantages over other types of transformers, such as voltage regulation, isolation, efficiency, flexibility, and reliability. However, they also need proper maintenance to prevent damage and ensure optimal performance.