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dreaded transformer
A time bomb near you?
Thai Rath Edition
July 1, 2022, 6:50 a.m.
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Surrounded by old transformers, there are "400 children" all over the city to heal the victims of Sampeng... the latest case of loss about "Transformer" traced back to the previous one, there was an incident..."Transformer exploded. Fireball falls on Fortuner Burning down the whole car"...This time it happened on the roadside in Mahachai City, October 2021.
In another case, at the beginning of the year, there was a fire...
kill mother and child
Transformer explodes, destroying 5 houses", Pom Prap Sattru Phai district, Bangkok, another news in April 2019, "hot, making transformers explode.
Flakes of fire caught fire on the grass on the side of the road, almost cutting off the car showroom.” The incident occurred along the Asian Road, Ban It Subdistrict, Mueang District, Ang Thong Province.
It seems that the "transformer" is another near danger that cannot be overlooked.
Try asking questions to Google...Google.
"Transformer Danger" lined up and read together to gain many more knowledge.
Emphasize the dangers that should be careful from...
“High voltage” if there is a leak during the rain or storm.
Lightning may occur on high-voltage power lines.
causing the voltage to run to the transformer
Which may cause sparks...causing fire even if the transformer has lightning protection devices, namely... "high voltage temptation" and "low voltage temptation", but should be careful
Because if there is an "electric leakage" out, it can cause "electric shock" to be more dangerous to life.
The case of "transformer explosion" is caused by a failure of the cooling system.
or the occurrence of a short circuit
which the incidence rate is not much
But if it happens, it can affect life and property.
In order to know deeply about the truth
"Electronic transformer... near-body time bomb" is dangerous, how much is it?
I have to talk to specialists in the field.
Ajarn Nattapong Prawan, Assistant Vice President and Head of Electrical Engineering Department, Institute of Electrical and Electronics Engineering
Mahanakorn University of Technology explains that "transformers" can be divided in several ways.
can be divided according to the power rating
or can be divided according to the voltage level or the purpose of use
Roughly...easy to understand if in Thailand
Usually it is divided into transformers.
Power... A large transformer that is a power transformer.
Most of them are installed at power plants, power stations.
Another type of “distribution transformer”, the transformer that was reported to explode at Sampeng, would be this type of transformer of the Metropolitan Electricity Authority.
or the Provincial Electricity Authority
This will reduce the voltage level down to one from the voltage from the Electricity Generating Authority.
and there is another type of transformer
“Measuring transformer” does not transmit power.
Now, transformers can also be divided according to the type of insulation used. There are mainly 2 types of "liquid insulation"...oil filling.
Usually use insulating paper with a transformer oil medium.
resulting in good thermal properties
It has high insulation durability.
But there is an important disadvantage that is...transformer oil can catch fire.
Emphasize that this "oil" is transformer oil.
mostly mineral oil
It can ignite, but it is not as flammable as gasoline and diesel, but it has the potential to catch fire and there is a risk of fire.
low boiling point transformer oil
The low ignition point is usually theoretically 140 degrees Celsius, meaning that ... until the transformer oil catches fire.
must be very high temperature
Therefore, most customers may have the option of using another type of transformer, “dry type”, or it could be oil-insulated but filled with non-flammable liquid insulation.
for increased safety
But most of them will use ordinary oil insulation.
Because the other model will have a very expensive price.
Conclude that most of the transformers seen outside the building are all oil-based.
But if installed in the building
According to the regulatory standards, dry solid insulators must be used.
But like this, there is a problem with cooling as well as liquid oil.
The observation point will be the fins, good heat dissipation...
The loss value is also low.
Of course... the loss is less.
More energy will be used, which is a good technical benefit.
Ask about the expiration date
"Transformer" Ajarn Nattapong said that the oil type will last 25-30 years, the dry type will be 15-25 years ... On average, our electricity grid will retire at 25 years, but most of the time. and oil-type transformers if maintained well
It is inspected annually.
Some children can use it for 30 years or more.
For example, according to the factory
There must be a regular inspection cycle every year.
There is a law to enforce ... some places are intense, maybe half a year, there are also
Usually transformers do not require much maintenance.
Most dry types just look at cleaning, removing dust, and tightening the screws at various points.
The oil type may look more.
Because it is outside the building, such as looking at the wires, are the transformer connectors loose?
Is the oil level normal?
including insulating properties
If not, then there must be an oil filter in a closed system.
Taken out through the filter and put it back in again
How regularly is the inspection and maintenance of "transformers" all over the city...all over Thailand?
It is the responsibility of the relevant agencies.
But Thai people like us and others may be able to do just observe.
abnormalities of the transformer with the naked eye and using other senses by themselves
If there is a transformer nearby
have to live through it on a daily basis
noticing something wrong
Ajarn Nattapong reiterated that before the transformer had an abnormality or even exploded.
Most of them will have to hear the sound...maybe loud but how much smoke will spark?
I have never seen the case of the latest news at Sampeng.
It may be that the fault point of the transformer is attached to the rigged communication cables.
Plus, the narrower the area, the more heat build-up.
The insulation of the wires connected to the transformer has melted.
“Most of the oil transformers are installed outdoors...be aware that they are flammable.
The first signs of a malfunction may be noise, smoke, or sparks.
If there is, it may be caused by a short circuit.
or there is a point that is not tight enough to cause sparks
or severely, the transformer has smoke or has a burning smell ... as a result of internal insulation deterioration.”
Transformer protection is also available, if the voltage is exceeded, the system will cut off.
But if the transformer itself is abnormally hot, there should be no automatic cut-off system.
Whoever is nearby, passing by regularly, must regularly observe and check for abnormalities.
When you see it, immediately inform the neighbors to know.
and promptly notify the relevant agencies
But if you can choose, it's best to stay away.
“If there is a transformer near us
Should not do any activities for a long time, whether trading, parking spaces at least 5-10 meters apart. Usually there should be warning signs around the perimeter, but the problem is that doing so will obstruct the area a lot. climb
It is best to install cables underground.
to reduce the risk
But we may use more expensive electricity.”
An old transformer is a transformer that has been used for a long time.
Usually it is more than 15 years. The main condition is the loss of the transformer, increasing from the original. Next... the insulation may not meet the standard. Must be replaced. Three... Deterioration of the internal winding.
Risk of damage, short-circuit, sparks and equipment deterioration.
"Transformer", another danger near
It's dangerous, it's dangerous
As for who would say that it was not dangerous to say now, at least most people would probably not believe it anymore.
Can be far away
If absolutely necessary, stay away from him for long periods of time.
Whether it's high voltage...low voltage.
Read more...