A power transformer is an electrical device used to transfer electrical energy in any electrical circuit part between a generator and its primary distribution circuits. It is commonly designed to step voltage up or down. In essence, power transformers are essential in power systems, as they help enhance the safety and efficiency of these systems by raising and reducing voltage levels when necessary. As with electric motor rewinds, transformer rewinding is essential to produce the power that you need and ensure that it runs smoothly and effectively.
However, as with any other device, power transformers also have their risks. Although their likelihood is relatively low, there are instances when a power transformer may explode and burn. These explosions and burns often lead to property damage, injuries, and deaths. Therefore, it is necessary to avoid them as much as possible. Below are some of the most critical information that you should know about transformer explosions and burns.
Common Causes of a Transformer Explosion
Accidents and faulty mechanisms are the most common reasons behind explosions and burns of power transformers. These transformers are responsible for transferring energy between various circuits while switching energy from one voltage to another. When an accident or faulty mechanism occurs, a sudden surge in voltage levels can flood the transformer with too much electricity, resulting in an explosion.
Here are some of the common causes of faults and failures in a power transformer that can lead to an explosion or burn:
A lightning strike from a storm often can damage the wiring and equipment of the power transformer. When such damage occurs, two things may result – an overload in the electricity supply that flows into the transformer or the overheating of insulation fluid beyond its fire point. Extreme weather conditions like strong winds and rains can also cause trees to fall on the transformer and cause an explosion.
Like any other electrical device, power transformers are vulnerable to failures. These electrical failures can be caused by several factors, including poor insulation, over-voltage, static electrification, partial discharges, or power surges. When an electrical failure is detected, immediately engaging a power transformer rewinding service may be necessary to prevent further damage and possible explosion.
Aside from electrical failures, mechanical failures in power transformers can also lead to explosions and burns. A mechanical failure can be caused by hoop buckling, conductor telescoping, or conductor tipping. These mechanical failures happen when you do not maintain your generators and can be easily prevented with regular maintenance. Just as the generator requires generator overhauling from time to time, the power transformer needs to be inspected and maintained now and then.
What to Do When a Transformer Explodes
As mentioned, the explosion and burn of a power transformer can result in property damage, injuries, and deaths. Transformer explosions are severe incidents that can lead to massive damage. For this reason, knowing what to do after a power transformer explodes is extremely necessary. Here are the essential measures that you should follow after a transformer explosion:
- Do not approach the power transformer
This is the most important thing to remember when a power transformer blows. Failed power transformers can create various hazards, so keeping your distance from them is imperative, especially if you are not certified to handle these accidents. What you should do instead is to report the explosion immediately to the proper personnel to prevent more damage and assess other risks.
- Seek the help of a professional
When a power transformer explodes, it interrupts the electricity service to any facilities or buildings connected to the transformer. A certified professional should replace the destroyed hardware of the transformer right away to avoid further damage and injury.
This can be done by first shutting down any incoming electrical line and shutting off other electrical services in the immediate area so that the electrical grid will not experience stress while the replacement is being done. All of these should be conducted by a professional electrical engineer. Hiring a specialist for these repairs and replacements is crucial to ensuring that your electrical device will no longer be subjected to the same risks.
Conclusion
Ultimately, knowing what typically causes power transformers to blow and burn is essential to avoid these types of incidents as much as possible. On the other hand, knowing the necessary steps following a transformer explosion is vital to prevent further damage and injury. Transformer explosions are essentially severe incidents that can result in staggering adverse outcomes. Hence, being knowledgeable about them is undoubtedly a must.
Most repairs to fix a transformer will take between one and several hours. Extensive damage from storms or natural disasters can take up to several days.
When a blown transformer causes a power outage, the first question everyone wants an answer to is how long it will take before electricity is back up and running. Our guide will get you out of the dark and walk you through how long it takes to fix a transformer, the source of electricity to your home.
Many variables determine how long it takes to fix a transformer, including the type and severity of damage and the weather conditions. The average time to fix a transformer is between one hour to several hours. But, if there is severe or widespread damage, it can be up to several days or longer.
If the lights suddenly flicker and go out, and you find yourself in the dark, the only thing that seems important is finding out when the power will be back on. The electricity coming into your house is dependent on the transformer, which converts electricity into a lower voltage power source that is safe for use in your home. If the transformer blows, how long will it take to fix it?
If the transformer has blown and you are waiting for repairs, rest assured that electrical crews are on standby to correct it as soon as possible. Keep reading if you want to learn more about how long it will take to fix the transformer!
Nothing is more frustrating than wondering how long it will take to get the electricity back on in your house. Most transformers require a fast and straightforward fix; however, there are times when it will take much longer. There is no exact time known for how long it will take to fix your transformer; many common transformer repairs will be complete in as little as a couple of hours. However, many variables will affect how long it will take to repair a transformer. In worst-case scenarios, it might take up to several days.
Most transformer issues are due to overheating, and the length of time it takes to make repairs depends on the source of the problem. A transformer uses mineral oil to keep it cool and prevent overheating. If something makes it overheat, it can cause the transformer to need repairs or replacement. Often, this overheating will cause the transformer to “blow,” and you might hear a loud boom and see smoke or a flash of light.
Transformers go out for a variety of different reasons. There is no exact time guideline for how quickly the electric company can make each repair. However, knowing why the transformer went out in the first place helps estimate how long the repairs will take.
Sometimes wildlife will build a nest on top of the transformer, causing it to overheat. Other times a squirrel or other small creature might find its way into the transformer box. In this case, the repair is usually minor. The repair crew can have the transformer working again in a short amount of time.
Generally, if the repairs to the transformer are more complex, it will require more time. For example, if a car accident knocks down an electrical pole or a tree lies on top of a powerline, many more steps will be involved in repairing the transformer. First, the pole will need to be replaced, or the tree will need to be removed, and this part of the process can take at least a couple of hours. Complicated and severe damage will always require more time to fix a transformer.
Once these repairs are complete, work can begin on fixing the transformer. If the transformer was not severely damaged, it might take as little as an hour to repair, but extensive damage may take longer. Most repairs can be completed within several hours or less.
The Power Company has special crews prepared and on standby to handle all types of transformer repairs. Once they have access to the transformer, they will assess the damage and report back to the electric company how long they think the repairs will take.
Larger electric and power companies will have an outage map available on their websites. This map will show the Estimated Restoration Time, or ERT, and is updated as the electrical crews continue work on the transformer. If you are without power and unable to check the website, you can always call the power company for updates and ERT. They will often have an automatic recording that updates the status, and you can check back to learn how the progress is going.
Another factor determining how much time it will take to fix the transformer is how fast and easily the crew can get to it. Electric trucks are not considered emergency vehicles and will face the same traffic issues you do. Often there are traffic jams, or an accident has the roads shut down. In this case, it will take the electric company longer to reach the broken transformer’s destination.
How Long Does it Take to Fix a Transformer Damaged by the Weather?
The most common cause of a blown transformer is lightning and bad weather. If lightning strikes the transformer or wiring, it can immediately cause overheating inside the transformer, causing it to blow. During storms, high winds can cause trees or debris to fall onto the power lines and result in overheating. Freezing rain and ice can also be a problem for transformers.
The time it takes an electric crew to fix the transformer will depend on how quickly the storm subsides. Electric Crews have to wait for the lightning and dangerous weather conditions to pass before it is safe for them to do the work. All fallen trees and debris on the power line will need clearing before work can begin on the transformer. Any power lines knocked down will also have to be put back in place before transformer work can begin.
Most electric companies will have crews on standby during lousy weather. When it is safe, they will first assess the damage. If it is an easy fix, it might be just an hour or two to repair the transformer, but if there is more damage from the storm, it may require other issues to be addressed and taken care of first. This can delay the time it takes to fix the transformer and vary with every situation.
Sometimes, more than one transformer will be damaged in severe weather and need repair. Depending on how many transformers are out and how much damage there is, it can take up to several days to restore the transformers. Often, electrical crews will travel in from other cities to help make the repairs. Usually, the priority is to repair the transformers that will get the power restored to most homes in the shortest and safest time frame.
What Should I Do While Waiting for the Transformer to be Fixed?
Power outages and blown transformers can cause many hazards. Keeping yourself and your family and pets safe is the most important thing. Transformers and power lines can be hazardous, so never approach them and stay far away.
If a transformer has failed and the power goes out, you should call your local power company. Usually, they will already know about the power outage. However, the more information they have, the easier it is to assess the issue and get the transformer repaired. For example, you might see a tree on the power line from your window and immediately report it to the power company. Quickly having this information will allow the power company to send out the proper crews to get the power back up and running as soon as possible.
In Conclusion:
It is always frustrating when the power goes out. Minutes can feel like hours, but hang in there! The electric crews are working hard to make the repairs as quickly and efficiently as possible.
Many factors determine how long it will take to fix the transformer. Often some problems are out of the power company’s control and need to be addressed first.
It’s not easy being patient when the power is out, but most repairs will only take between a few hours at most.