Is the dry-type transformer prone to damage?
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Do dry-type transformers tend to fail easily? If a transformer fails, it will cause a power outage in the factory that uses that single transformer. The question is what is the probability of dry damage? What is the typical lifespan in years? If damage occurs, what usually causes the fault? This post was last edited by laoyier on 2009-3-26 10:22.]
The chance of failure is very low; small control transformers hardly ever break down； But I’ve also seen how bad it can get, and there’s probably only one reason for that: poor heat dissipation. If you pay attention to heat dissipation, then there won’t be any problems.
When installing indoors, it is necessary to monitor changes in the transformer’s temperature; usually, this is due to thermal aging. When used properly with proper protection, it generally won’t get damaged
Dry transformers are sensitive to water; it is necessary to prevent moisture and leaks, pay attention to temperature, and start the cooling fans in a timely manner to avoid insulation degradation
Buy one that doesn’t require air cooling. Install air conditioning and add fans when the load rate is high
1. For dry-type power transformers and their main components, such as on-load tap changers, temperature control and display devices, and air cooling systems, products that have passed quality certification should be selected. 2. The room in which the dry-type power transformer is installed should have an independent ventilation system. Dry-type power transformers located in areas with high ambient temperatures, as well as box-type substations exposed to outdoor sunlight, should have facilities to further improve ventilation. There should also be temperature control devices that enable the air cooling system to be activated or deactivated as needed, based on the temperature of the windings. For dry-type power transformers operating in extremely cold conditions, their maximum operating current should not exceed a certain multiple of the rated current indicated on the nameplate. 3. The rated service life of dry-type power transformers is not less than 20 years. 4. When operated and maintained in accordance with the regulations, the likelihood of damage is very low.
Dry-type transformers have a very low failure rate; the parts that tend to fail most often are the fans and temperature controllers, with no other types of failures having been observed. These two are key to dry-type transformers. High temperatures can cause aging of the transformer’s insulation, thereby affecting its lifespan. As long as attention is paid to the environment, dry-type transformers can have a fairly long lifespan.
Well said: handshake
Dry-type transformers are mainly used in areas with high fire resistance requirements. However, a fire occurred in the dry-type transformer at our facility, and the cause was primarily a quality issue – an internal short circuit that led to discharge and subsequent combustion. It’s still better to choose products from large manufacturers, as their manufacturing processes are reliable! Dry-type transformers can operate under overload conditions.
What the people upstairs have said is far too idealistic. The key issue is that today’s transformer manufacturers deliver products on an economical basis; therefore, when signing a technical agreement it is essential to pay close attention to specifying technical parameters such as the winding structure, overload capacity, capacity, and weight. Otherwise, one will end up suffering the consequences without any way to remedy the situation! It’s good that dry-type transformers perform well, but they have too high requirements for their operating environment!
Dry-type transformers are generally equipped with temperature monitors that control the automatic start and stop of the cooling fans; usually, the fans start to operate at 80 degrees and stop at 100 degrees. Our load has not exceeded 60%, and since an air conditioner is installed in the distribution room, the fans have not had to be used yet. It’s quite normal given that it has been over 4 years.
It seems that when the dry-type transformer is used in an appropriate environment and maintained properly, its failure rate remains quite low. I’ve been considering whether to get a spare transformer for my company, but it seems unnecessary now. .
If proper attention is paid to factors such as insulation and temperature when using dry-type transformers, their service life can be quite long. However, many manufacturers of dry-type transformers supply them with the most cost-effective configuration. If one purchases dry-type transformers from smaller manufacturers, it is essential to strictly specify the technical requirements in the technical agreement; otherwise, the likelihood of problems arising is high