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Why Electrical Rooms Prefer Dry-Type Transformers

Oct 30,2024 | nretec

In modern buildings like malls, hospitals, and schools, choosing the right transformer is very important. Dry-type transformers are popular, but oil-filled transformers also have their uses. Let’s compare them in three ways: safety, cost, and noise. We will also look at examples of where each type is used.

1. Safety: Dry-Type Transformers Are Safer in Crowded Places

  • Dry-type transformers do not use oil, so there is no fire risk.
  • Oil-filled transformers contain oil. If the oil leaks or there is a short circuit, it can cause a fire.
    Example: In a hospital, fire can be dangerous for patients. That’s why a dry-type transformer is safer. However, in factories, oil-filled transformers are used because they provide better insulation and can handle tough conditions.

2. Cost: Dry-Type Transformers Cost Less to Maintain

  • Dry-type transformers need less maintenance because they have no oil.
  • Oil-filled transformers need regular oil changes, which can be expensive.
    Example: In a shopping mall, dry-type transformers are used to save 20-30% on maintenance costs. However, oil-filled transformers are still useful in factories where higher voltage is needed, even though they cost more to maintain.

3. Noise: Dry-Type Transformers Are Quieter

  • Dry-type transformers make less noise (around 45-60 decibels), making them good for quiet places like hospitals and offices.
  • Oil-filled transformers are louder, but they work well outdoors or in noisy factories.
    Example: In an office building, dry-type transformers are used because they run quietly and do not disturb people working. In an industrial plant, oil-filled transformers are used because they can handle extreme weather and high voltage, even though they are louder.

Example of Use

In a mall, a dry-type transformer is the best choice because it is safe and quiet, creating a better environment for shoppers. On the other hand, in a factory, an oil-filled transformer is used because it can handle heavy power needs, even though it costs more to maintain.

Conclusion

Dry-type transformers are a good choice for hospitals, malls, and schools because they are safe, quiet, and need less maintenance. Oil-filled transformers are better for factories and outdoor areas where high voltage and strong insulation are required. Choosing the right transformer helps keep people safe and saves money over time.

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