power transformer malfunction

Power transformers- This is the basis of any electrical power system. Often, when discussing problems with them, you fall into the field of view of superficial solutions and are silent about many nuances that directly affect the durability and reliability of the equipment. People tend to look for 'crutches' rather than getting to the root of the problem. In this article I will try to share the experience accumulated over the years of working with this equipment and highlight the most commontransformer malfunctionsand talk about approaches to their diagnosis and elimination. I can’t promise absolute comprehensiveness, but I hope the information will be useful.

Review: More than just 'broke'

When it comes totransformers, the problem often boils down to a simple 'broke'. But this is an extremely simplified view. Understanding the nature of the breakdown is key to making the right decision. From a simple winding break to complex processes occurring in the oil, the range of possible problems is huge. Incorrect diagnosis and the wrong approach to repair can lead to repeated breakdowns and even serious accidents. The main difficulty is multifactoriality. One problem often causes another, and all relationships must be considered.

Common reasons for failures

It’s worth starting with the fact that most breakdowns are associated with overloads, overvoltages and problems with the cooling system. Yes, this is banal, but this is precisely what often affects ignored factors that lead to serious consequences. For example, insufficient maintenance of the cooling system can lead to overheating of the oil and damage to the insulation. This is a classic example of a little neglect developing into a serious breakdown.

Oil diagnostics: the first thing to do

The first thing I always do when receiving a repair request istransformer- This is oil diagnostics. Yes, this may seem like a routine procedure, but it allows you to obtain a huge amount of information about the condition of the equipment. Determining the acidity of the oil, the presence of water, traces of gases - all this may indicate hidden problems. For example, increased acidity of the oil indicates decomposition of the insulation, and the presence of water indicates a violation of the seal. It is especially important to monitor gas levels as they can indicate overheating and insulation degradation.

We at Wenzhou Qiaonasen Electrical Equipment Co.,Ltd often encounter situations where the cause of the breakdown was hidden in oil insulation problems, discovered only after a thorough oil analysis. This is what makes us pay special attention to this diagnosis.

Typical malfunctions of power transformers and ways to eliminate them

Let's take a closer look at some of the most commonpower transformer malfunctions. I'll start with the problem with the windings. A break or short circuit in the windings is one of the most common causes of failures. A break often occurs due to mechanical damage or overheating, and a short circuit occurs due to insulation failure. For diagnostics, a viscometer and the electrical resistance of the windings are used. If the winding breaks, rewinding is usually required. If there is a short circuit, then it is necessary to find the damaged area and eliminate it, or replace the damaged winding.

Insulation problems: from surface cracks to complete failure

Insulation is the most important elementtransformer, ensuring its reliable operation. Damage to the insulation can be caused by overvoltages, overheating or aging of the material. Surface cracks can be eliminated by applying a special protective coating. In case of serious damage to the insulation, a complete inspection of the windings and replacement of damaged areas is required.

Malfunctions in the cooling system: overheating is a direct path to failure

Cooling systemtransformerplays a key role in its reliable operation. Malfunctions in the cooling system, such as clogged channels, pump or fan failure, lead to overheating of the oil and damage to the insulation. Regularly checking the condition of the cooling system and timely troubleshooting is the key to long and reliable operation of the transformer.

One day we were renovatingtransformer, which constantly overheated. After a thorough diagnosis, it turned out that the cause was a clogged radiator. A simple cleaning of the radiator eliminated the problem and returned the transformer to service. This case is a clear example of how a little neglect can lead to serious consequences.

Restoration and repair: practical aspects

Recoverytransformer– this is a complex and responsible process that requires high qualifications and the use of specialized equipment. After diagnosis, it is necessary to determine the extent of damage and develop a repair plan. In most cases, repairs include rewinding windings, restoring insulation and replacing damaged parts. It is important to use high-quality materials and follow repair technology to ensure the durability and reliability of the equipment.

Use of modern technologies in transformer repair

Recently, modern technologies in repair have become increasingly widespread.transformers. For example, thermography and ultrasound diagnostic methods are used to diagnose insulation. To restore insulation, new materials and technologies are used to ensure higher reliability and durability. The use of these technologies allows us to reduce repair time and improve the quality of work.

Our company, Wenzhou Qiaonasen Electrical Equipment Co., Ltd., constantly improves its repair methods by introducing the latest technology and using modern equipment. We cooperate with leading manufacturers of materials and equipment to provide our customers with the highest quality of services.

Avoiding faults: prevention is the best cure

As with any equipment, prevention is the best way to avoidpower transformer malfunctions. Regular maintenance, which includes checking the condition of the windings, insulation and cooling system, allows minor faults to be identified and corrected in a timely manner, preventing them from developing into serious problems. It is also important to follow the rules for operating the transformer and avoid overloads and overvoltages.

Particular attention should be paid to the quality of electricity. The presence of harmonics and overvoltages can lead to insulation degradation and other failures. It is recommended to use harmonic filters and surge protectors.

Conclusion

Repair and maintenancepower transformersThis is a responsible task that requires professional knowledge and experience. I hope this article will help you better understand the nature of the problems you may encounter with this equipment and help you make the right decision about whether to repair or replace it. Remember that prevention is the key to long and reliable operation of the transformer.