There can be various reasons for electrical faults in dry-type transformers. Here are some common causes that may lead to electrical faults:

Insulation Damage: Insulating materials inside the transformer, such as insulation paper and varnish, can deteriorate due to factors like aging, overloading, and changes in environmental conditions. This can result in reduced insulation performance or complete failure, leading to short circuits or breakdowns.

Overvoltage: Prolonged exposure to overvoltage conditions can damage the insulation of the transformer, causing internal breakdowns. Overvoltage can occur due to grid faults, operational errors, lightning strikes, and other factors.

Short Circuits: Internal or external short circuit events can cause currents far exceeding the rated values, leading to insulation breakdown, overheating of coils, and other faults.

Load Overloading: Operating the transformer with a load exceeding its rated capacity can result in coil overheating, insulation aging, and related issues.

Humidity and Contamination: Environmental humidity and pollutants can impact the performance of insulation materials, leading to insulation breakdown, leakage currents, and other problems.

Mechanical Damage: Mechanical damage to the transformer, such as external impacts or vibrations, can harm insulation, coils, and other components, causing faults.

High Temperatures: Elevated ambient temperatures can affect transformer performance, leading to insulation aging, increased internal resistance, and other issues.

Aging and Wear: Prolonged usage can cause aging and wear of transformer components, affecting its overall performance.

Design or Manufacturing Defects: Defects in the design or manufacturing process, such as inappropriate material selection or process issues, could lead to problems during operation.

Improper Maintenance: Neglecting regular maintenance, inspection, and upkeep can result in the gradual accumulation of issues, eventually leading to failures.

To prevent electrical faults in dry-type transformers, regular maintenance and inspection are essential to ensure proper insulation performance, reasonable loads, and suitable environmental conditions. Additionally, proper operation and the use of protective devices can mitigate the risk of electrical faults. If there is suspicion of underlying issues with the transformer, prompt actions should be taken to investigate and rectify the situation, ensuring the equipment's safety and normal operation.

LuShan, est. 1975,  is a Chinese professional manufacturer specializing in power transformers and reactors for 48 years. Leading products are single-phase transformer, three-phase transformers, DC inductors, AC reactors, filtering reactor, expoxy resin high-voltage transformer and intermediate, high-frequency products. Our transformers and reactors are widely used in 10 application areas: rapid transit, construction machinery, renewable energy, intelligent manufacturing, medical equipment, coal mine explosion prevention , excitation system, vacuum sintering, central air conditioning.

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